Merge pull request 'fix: hydration-safe banner clock (#44, v0.10.1)' (#47) from fix/hydration-jump-dispatch into master

- ADMIN button in the mission-control header opens a table picker + row grid with add/edit/delete (components/admin-panel.tsx), deliberately unauthenticated by explicit request
- /api/admin/tables and /api/admin/tables/{name}/rows driven off a name→table registry built from lib/db/schema.ts (lib/db/admin.ts) — no per-table code; 404 unknown table, 400 malformed payload, 409 constraint violation
- OpenAPI spec updated for all four admin operations + Admin* schemas
- unit: lib/db/admin.test.ts (registry, CRUD round-trips, composite PKs, error mapping); e2e: read-only admin.spec.ts

AGENTS.md

@@ -19,3 +19,13 @@
 
 ## Other
 1. For longer terminal tasks you should use pty_* tools.
+
+<!-- BEGIN:nextjs-agent-rules -->
+
+# This is NOT the Next.js you know
+
+This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` (resolved from this file's directory; in monorepos the `next` package may not be visible from the repo root) before writing any code. Heed deprecation notices.
+
+This block is written and re-added by `next dev` — verify at `node_modules/next/dist/server/lib/generate-agent-files.js`. Removing it from a diff only re-creates the uncommitted change; committing it with your work keeps the tree clean.
+
+<!-- END:nextjs-agent-rules -->

CHANGELOG.md

@@ -1,5 +1,119 @@
 # Changelog
 
+## v0.10.1 — 2026-10-03 18:36
+- Fix React 19 hydration mismatch on every production load — the banner's live clock was prerendered at build time in the static page and desynced at hydration (CI-verified: no hydration errors in the job logs). A real fix, but NOT the cause of the red e2e jump specs.
+- Fix the world-map jump dispatch — the actual cause of the three deterministically red e2e jump specs: TeamBuilder's `blocked` term was `undefined`, not `null`, whenever no jump was queued (`Array.find` returns `undefined`), so the roster rendered (truthiness check) while the DISPATCH button's `blocked !== null` guard read it as blocked and stayed disabled — the JUMP panel's dispatch was permanently dead on an empty queue (the 300 s `waitForResponse` timeout; present since the builder shipped in v0.10.0, so the UI-jump specs were red on every run since, on a fresh DB; non-JUMP panels were unaffected, their branch yielding `null`).
+
+## v0.10.0 — 2026-10-03 00:57
+- Queue-based actions (#44): every game action (jump, explore, ship upgrade/expand/build, research) is now a queued task with an assigned team — a lead + optional helpers. Validation and cost deduction happen at queue time (unknown crew → 404, busy/committed crew → 409, in-transit or second jump → 409); effects apply when the task completes, mission accept is instant and free, and mission-completion checks run when the satisfying task resolves.
+- Manual time: new `POST /api/turn` advances exactly one turn — each active task ticks down, completions resolve via per-type resolvers (reusing the existing jump/explore/ship/research logic), FIFO successors auto-start; an empty queue is a free skip. `save.turn` now only increments here, and the UI gets the NEXT TURN button (bottom-right) with the turn counter.
+- Crew teaming with a live duration preview: action buttons open an inline team builder — pick a lead (radio), toggle helpers (checkboxes) — and show the computed duration as the team changes ("Lead AVA VANCE · PILOT L2 + 1 helper → 3 turns"); busy/committed members are disabled with a reason. A new active-tasks strip (bottom-left) lists active tasks first, pending FIFO tasks dimmed.
+- Trait duration modifiers: all 15 non-combat traits now affect duration (7 good — cancel the role-mismatch penalty or −1 turn for a specific action type; 8 bad — +1 turn for a specific type or any action), applied to the lead only; the 3 combat traits are labelled STANDBY until the future encounters iteration (the 2 outcome-effect traits ship in #43).
+- New `tasks` table (schema v7; idempotent backfill for existing saves — existing saves gain an empty table, turn/crew/inventory untouched) and a single balance module `lib/game/crew-costs.ts` (work points, power bands, trait modifiers); OpenAPI spec updated accordingly.
+- Tests: unit matrix covers the duration formula, queue validation rules and tick resolution (completion effects, FIFO auto-start, in-transit blocking); the whole e2e suite was reworked from instant-resolution to the queue + NEXT TURN model (assign team → NEXT TURN ×N → assert the effect).
+
+## v0.9.12 — 2026-09-29 21:40
+- ADMIN button in the mission-control header (top right, next to the SHIP NOMINAL / SECTOR SCAN badges) opens a DB CRUD panel (#38): pick any of the ten game tables from `lib/db/schema.ts`, browse its rows in an HTML table, and add/edit/delete rows via a per-column form. Driven by new `/api/admin/` endpoints — `GET /api/admin/tables` (columns + row counts), `GET|POST|PATCH|DELETE /api/admin/tables/{name}/rows` — built off a name→table registry so there is no per-table code; unknown table names get 404, malformed payloads 400, constraint violations 409. Deliberately unauthenticated by explicit request (marked with a `ponytail:` comment).
+- e2e: new read-only spec — click ADMIN, assert the panel lists every table the API reports, open `saves` and assert its rows render matching `/api/admin/tables/saves/rows` (no mutations in specs; CRUD is covered by unit tests in lib/db/admin.test.ts).
+
+## v0.9.11 — 2026-09-29 14:49
+- NAVIGATION AI now enables multi-system jumps (#35): once the existing root tech is researched, `/api/jump` accepts targets up to two hops away (BFS over jump routes) and a multi-hop jump costs one turn per hop — single-hop jumps keep their existing cost. On the WORLD MAP chart, two-hop systems become clickable JUMP fields with a distinct `// JUMP ×2` sublabel; without the tech the range stays adjacent-only as before.
+- e2e: new spec researches NAVIGATION AI (scan loop + SKILL TREE UI) and jumps to a two-hop system in one action, asserting the world state and the +2 turn cost; the world-map button-count spec now derives its expected count from the save's tech state so it holds across retries on the shared CI DB.
+
+## v0.9.10 — 2026-09-29 12:57
+- The WORLD MAP now fills the entire available area of its tab (#36): in wide mode (pinned viewport, #21) the OPERATIONS Tabs are a full-height flex column and the world-map panel flexes to the bottom of the pane — the chart SVG sizes to the measured container instead of the old fixed 380px height, so there is no internal scrollbar on this tab at any window size. The scene keeps its viewBox and scales with the pane on resizes (pan/zoom stay accurate; re-fitting after a resize is intentionally not done). Narrow mode keeps the fixed fallback height since the page scrolls naturally there.
+- Follow-up to that layout change (CI run 382): the OPERATIONS Tabs root uses `min-height: 100%` instead of `height: 100%`. With a capped height, a tall tab's content overflowed the flex column and shrank items down to their automatic minimum — the tablist's `overflow-x: auto` zeroes that minimum per CSS spec, so the bar collapsed to ~0px with its buttons clipped out of hit-testing (every subsequent tab click failed with "div intercepts pointer events"); a capped box also released the sticky pin on deep scrolls. With min-height the box grows to fit tall tabs — the bar keeps its natural height and stays pinned across the whole scroll range, while WORLD MAP still fills the pane exactly.
+- e2e: the #31 spec no longer relies on WORLD MAP's overflow to force scrolling — it now switches to SHIP SYSTEMS, whose six always-present stacked system cards deterministically overflow the shrunk 1280×560 pane (waiting for the HULL card first), and asserts the same pinned tab bar.
+
+## v0.9.9 — 2026-09-29 11:21
+- The WORLD MAP chart is now a force-directed graph (d3-force) with pan + zoom (d3-zoom), replacing the hand-rolled static NodeGraph render (#28): nodes settle into a dynamic layout seeded from the API coordinates and visibly rearrange after every jump, then auto zoom-to-fit so the whole network stays framed in the chart box. Wheel/drag pans and zooms the scene; only systems adjacent to the current one remain clickable (same `role=button` + name contract as before), all nodes lock while a jump is in flight, and a real pan's trailing click never triggers an accidental jump. Jump flow (`POST /api/jump`, turn counter, `onJumped` refresh from #30) is unchanged; the now-orphaned hand-rolled `NodeGraph` component (world map was its only consumer) is deleted.
+
+## v0.9.8 — 2026-09-29 10:20
+- The OPERATIONS tab bar now stays pinned while its content scrolls (#31): the TabsList is `position: sticky; top: 0` with a z-index above the panel content, so it pins to the top of the OPERATIONS scroll area in wide mode (where only the center pane scrolls, #21) and to the viewport when the body scrolls in narrow mode. Its existing opaque background (`--surface-raised`) keeps scrolled content from showing through; no layout restructure needed — #21 behavior is untouched.
+- e2e: new smoke spec — shrink the viewport so WORLD MAP's fixed-height chart overflows the pane, scroll the panel to the bottom (asserting a real offset), and check the tablist's bounding box hasn't moved.
+
+## v0.9.7 — 2026-09-29 09:59
+- LOCAL SYSTEM no longer shows the previous system after a jump (#30): WorldMapPanel owns the world state and applied the `/api/jump` response locally, so MissionControl's lifted `/api/system` state (which drives the LOCAL SYSTEM tab, CARGO HOLD and the SECTOR row) went stale until a page refresh. The panel now takes an `onJumped` callback that MissionControl wires to a `/api/system` refetch after every successful jump — same failure policy as the mount fetch (keep old state on error).
+- e2e: new smoke spec — click-to-jump on WORLD MAP, wait for the chart's turn counter to update, switch to LOCAL SYSTEM and assert its header shows the NEW current system from `/api/world` (no `page.reload()` workaround; one jump per run/retry, same pattern as the existing jump test).
+
+## v0.9.6 — 2026-09-29 09:41
+- The active operations tab now survives a page refresh (#27): the selected tab ID is persisted to `localStorage` (`sw-active-tab`) on every change and restored on mount when it matches one of the seven valid tab IDs (unknown/stale values fall back to WORLD MAP). The Radix Tabs are controlled for this; SSR and first client render still agree on the default, so there is no hydration mismatch.
+- e2e: new smoke spec — click CREW, reload, assert `aria-selected=true` again (fresh context per run/retry, no API state touched, idempotent).
+
+## v0.9.5 — 2026-09-29 09:13
+- Fixed the production freeze reported after the v0.9.3 (#21) deploy ("entire UI system is now fucked"). Root cause was NOT the #21 layout change (verified healthy across all 7 tabs and multiple viewports — no clipping, middle pane scrolls internally, side panes fixed): it was world name generation. `makeName` draws from a finite pool of 16×8=128 system names with an unbounded rejection loop, so once a save grew past ~128 systems (turns of play / e2e jump loops), any jump into an undiscovered system spun forever on Node's single thread — sql.js runs synchronously, so the whole process blocked and EVERY API route hung, leaving all panels stuck at LOADING.
+- `makeName` (lib/game/world.ts) now falls back to numbered variants (`Kepler Drift 2`) once the pool is exhausted, so it always terminates; `makeCrewName` (lib/game/crew.ts) gets the same guard — the roster has no cap and its 16×22=352 pool would eventually exhaust too.
+- Tests: unit — both name generators terminate with unique numbered names after full pool exhaustion (80 tests green, was 78); e2e unchanged — no spec depends on the old behavior and a fresh CI stack never approaches 128 systems.
+
+## v0.9.4 — 2026-09-29 08:29
+- Top bar (#23): the `◄ SHIP` label in the mission control header is replaced with the app version number (e.g. `v0.9.4`). The header reads it from `package.json` via the same `@/package.json` import that `/api/version` and the OpenAPI spec use, so there is a single source of truth — no second hardcoded copy.
+- e2e: no spec changes needed — no spec asserted on the old `◄ SHIP` label (the landing-page test only checks the SpaceWanderer heading). All 15 specs compile unchanged.
+
+## v0.9.3 — 2026-09-29 08:20
+- Layout (#21): only the middle column scrolls now — the app is pinned to the viewport (`height: 100vh` + `overflow: hidden` on the root in wide mode) so body-level scrolling no longer moves the side panes. Left/right columns keep their existing `overflow-y: auto`, so any overflowing content (e.g. a long planet list) scrolls inside its own track instead.
+- Added `min-height: 0` to the BODY wrapper and the 3-column grid — flex/grid items default to a content-based minimum size, which is what let the page grow past the viewport before.
+- The middle OPERATIONS panel became a flex column with its PanelContent as the scroll area (`flex: 1; min-height: 0; overflow-y: auto`): long tab content scrolls inside the panel while the "OPERATIONS // SHIP COMMAND" header stays pinned — without this, the Panel root's default `overflow: hidden` would have clipped it.
+- Narrow layout (<900px) is unchanged: stacked columns with natural body scroll (the viewport pin applies to wide mode only).
+- e2e: no spec changes needed — none use mouse.wheel/scrollTo, and Playwright scrolls click targets into view within any scroll container. All 15 specs compile unchanged.
+
+## v0.9.2 — 2026-09-29 08:00
+- WORLD MAP (#19): the bottom JUMP ROUTES button list is gone — jumps now happen by clicking galactic chart fields. Systems adjacent to the current one (the same set as before, undiscovered included) are clickable nodes with a pointer cursor and a `// JUMP` sublabel; the current system stays bright green with CURRENT, unreachable systems are dimmed (OFFLINE) and not clickable.
+- NodeGraph (`components/ui/node-graph.tsx`) gained two optional, backward-compatible additions: an `onNodeClick(id)` prop that turns non-disabled nodes into buttons (click + Enter/Space, role=button, aria-label, focusable), and a per-node `disabled` flag — while a jump is in flight every node locks, mirroring the old disabled-button behaviour.
+- The jump flow itself is unchanged: same POST /api/jump call, world state refreshed from the response (turn counter, current system, new routes), event log entry written server-side as before.
+- e2e: two smoke tests touched the removed buttons and were updated — "world map shows…" now asserts the adjacent systems render as clickable chart fields (role=button count matches API adjacency) and "jumping to an adjacent system" clicks the target node by its accessible name. All 15 specs compile; `jumpToFreshSystem` is API-driven and needed no change.
+
+## v0.9.1 — 2026-09-29 06:47
+- UI layout pass (visual only — no game logic or API changes): CARGO HOLD // INVENTORY moved out of the LOCAL SYSTEM tab into a persistent panel in the right column; the UPCOMING ENCOUNTERS placeholder was removed entirely; the SHIP DATA placeholder was merged into VESSEL METRICS.
+- Grid: `260px / 1fr / 240px` → `320px / 1fr / 360px` (left pane ~+23%, right pane ~50% wider).
+- Cargo state wiring follows the existing lifted-state pattern: MissionControl fetches `/api/system` on mount and owns the SystemState; LocalSystemPanel receives it as a prop, keeps its planet list + scan result + explore action, and reports each scan's response up via `onChanged` (same as ShipSystemsPanel) — so CARGO HOLD mirrors scans live with no polling.
+- VESSEL METRICS now carries the two SHIP DATA rows that had real values: SECTOR (current system name from the lifted state) and TURN (`ship.turn`). The rest was dropped — HULL INTEGRITY / REACTOR OUTPUT / CREW ACTIVE duplicate the existing progress bars, TOTAL MODULES duplicates the left column's "N ONLINE" badge, DRIFT VELOCITY has no game equivalent.
+- e2e: no assertion changes needed — the LOCAL SYSTEM tests only assert panel internals (header, EXPLORE buttons, SCAN RESULT) and API state; CARGO HOLD / UPCOMING ENCOUNTERS / SHIP DATA were never referenced by any spec. All 15 specs compile unchanged.
+
+## v0.9.0 — 2026-09-29 02:47
+- EVENT LOG tab — the last of the seven tabs to go live (issue #11): the terminal now renders the save's real game events instead of a placeholder feed. Every action already appends an event row (new game, jump, scan, research, ship upgrade/expand/build, mission accept + completion); this issue adds the read side and the rendering.
+- New endpoint: `GET /api/events` → latest N events, newest first (`{id, turn, type, message, createdAt}`), auto-initializes like all other reads. Optional `?limit=` (default 50, cap 200; non-integers or out-of-range values → 400). OpenAPI spec in code updated (14 → 15 paths) with the Event schema enumerating the eight event types.
+- Read model (`lib/game/events.ts`): `getEvents(db, limit)` — ORDER BY id DESC LIMIT N over the existing append-only events table; `parseEventLimit` for the query param. No schema change — the events table and all its writers already existed.
+- EVENT LOG tab: self-fetching EventLogPanel (MissionPanel pattern — refetches on each tab open). One terminal line per event: `T<turn> // <MESSAGE>` uppercased, with the event's local time as the timestamp; new_game lines render as system lines. Placeholder feed + now() removed from mission-control.tsx.
+- Tests: unit — parseEventLimit default/accept/reject (400) and getEvents newest-first ordering + slicing; writer coverage gaps closed so every action type is asserted with correct turn/type/message (expand had no event assertion at all; build and mission-complete lacked the turn check); e2e — after a jump + scan, both events appear in GET /api/events with the newer one first and the terminal renders both lines (idempotent across retries: asserts on this run's own entries by turn/message, never absolute counts), plus the latest five log lines come back identical (ids included) after the mid-run container restart.
+
+## v0.8.0 — 2026-09-29 01:56
+- MISSIONS tab — contract generation, acceptance and completion (issue #10): the first objective loop on top of issue #9's research. The board is generated deterministically from the save seed; one mission is ACTIVE at a time; completion is checked after every jump and scan and grants its reward into the cargo hold.
+- New table (`lib/db/schema.ts` + DDL): `missions` (id/save_id/type/description/target_system_id/condition_kind/progress_target/progress/reward_kind/reward_qty/state). Seeded on new game AND as backfill step v6 — same pattern as tech; saves created by older code get their board on first read. `SCHEMA_VERSION` 5 → 6.
+- Pure mission model (`lib/game/missions.ts`, no save.ts import — the completion hooks are called FROM save.ts, one-way): three types — DELIVER (jump to a target system), EXPLORE (scan N = 2–4 bodies), FIND (haul in an item of one kind). `missionRng(seed, turn)` anchors generation exactly like world expansion does; every action costs exactly one turn, so the stream never repeats. The board is always topped up to ≥3 AVAILABLE after every action (`topUpMissionBoard`, idempotent); DELIVER targets only discovered non-current systems (none on a fresh game → initial contracts are EXPLORE/FIND).
+- Acceptance & completion: `acceptMission` — 409 while another mission is ACTIVE or the contract isn't AVAILABLE, costs one turn like every other action and writes an event. `checkMissionCompletion` runs inside jumpToSystem/explorePlanet before persist (one atomic write): DELIVER completes on arrival at its target system, EXPLORE counts scans (capped), FIND completes when a haul contains its kind; completion marks DONE, grants the reward as one neutral 'MISSION REWARD' row of the mission's kind (spenders consume by kind only) and writes an event.
+- New endpoints: `GET /api/missions` → `[{id,type,description,targetSystemId,conditionKind,progressTarget,progress,rewardKind,rewardQty,state}]`; `POST /api/missions/{id}/accept` → fresh board (400 non-integer id, 404 unknown, 409 wrong state / active conflict). OpenAPI spec in code updated (12 → 14 paths) with the Mission schema.
+- MISSIONS tab now renders REAL data: one card per contract — type title + state badge (AVAILABLE/ACTIVE/DONE), CONTRACT // #id line, objective, reward line and an EXPLORE-only progress line; ACCEPT is enabled only when the contract is AVAILABLE and nothing else is ACTIVE, each response applied directly (no polling). Placeholder encounter content removed.
+- Tests: unit — deterministic generation per type + reward range over 200 draws, same-stream determinism, DELIVER target selection / null on a fresh game, top-up idempotency + MIN_AVAILABLE floor, v6 backfill on pre-mission saves (idempotent), accept validation (404/409) + turn + event + re-top-up, per-type completion through real jump/explore actions incl. wrong-system non-completion and reward accumulation into one row; e2e — MISSIONS tab accepts a contract via the UI (card flips ACTIVE, button disables), completes it via API (scan loop for EXPLORE/FIND, BFS jump path for DELIVER) and asserts DONE + the reward landed in the hold, plus the mission board survives the mid-run container restart.
+
+## v0.7.0 — 2026-09-29 00:38
+- SKILL TREE tab — technology research unlocks (issue #9): the second spend-side loop on top of issue #8's ship systems. Researching a tech costs inventory items + a turn and its unlock effect then gates or raises ship actions, so the two tabs interlock: researching WEAPONS SYSTEMS is what makes building WEAPONS possible at all.
+- New table (`lib/db/schema.ts` + DDL): `tech` (id/save_id/slug/name/cost_kind/cost_qty/prerequisites/effect/researched, UNIQUE(save_id,slug)). Definitions are seeded from the pure module on new game AND as backfill step v5 — same pattern as ship_systems; saves created by older code get the tree on first read. `SCHEMA_VERSION` 4 → 5.
+- Pure tech model (`lib/game/tech.ts`, no DB imports — imported by both server and UI so research/cap/gate logic can't drift): six techs in two short chains (WEAPONS SYSTEMS → PLASMA CANNON, REACTOR OVERCLOCK → FUSION CORE) plus four roots. Effects: WEAPONS SYSTEMS gates building WEAPONS; the other five raise one system type's UPGRADE level cap or EXPAND capacity cap by 2–3 over the base caps. Helpers compute per-tech state (RESEARCHED / AVAILABLE / LOCKED + missing prereq names), effective caps and build gates from a set of researched slugs.
+- Research action (`lib/game/research.ts`): `getTechState` → the full tree with per-save state; `researchTech` validates prerequisites (409, naming what is missing) and the cost against the cargo hold (422), spends it through the same oldest-row-first path as ship actions, marks the tech researched, costs a turn and writes an event.
+- Ship-action gating (`lib/game/ship.ts`): `buildSystem('WEAPONS')` now 409s "requires the WEAPONS SYSTEMS tech" until it is researched; UPGRADE/EXPAND use the effective caps from researched techs, so a raised cap re-enables buttons that were capped.
+- New endpoints: `GET /api/tech` → `[{id,slug,name,costKind,costQty,prereqs,effect,state,missingPrereqs}]`; `POST /api/research {techId}` → fresh tech tree state (400 malformed body, 404 unknown id, 409 already researched / prereq missing, 422 insufficient hold). OpenAPI spec in code updated (12 paths).
+- SKILL TREE tab now renders REAL data: one card per tech with a state badge, cost line, UNLOCKS line and — when locked — the blocking prerequisite(s); RESEARCH is enabled only for AVAILABLE techs whose cost the cargo hold can pay, and each response is applied directly (no polling). SHIP SYSTEMS cards pick up the same pure helpers: effective caps drive UPGRADE/EXPAND disabling and gated builds show a red `REQUIRES // <TECH>` line with BUILD NEW disabled. Placeholder skill cards removed; MissionControl owns both states so the tabs stay in sync.
+- Tests: unit — tree seeding on new game + v5 backfill (deterministic, idempotent), per-tech state incl. locked-with-missing-prereq names, research cost validation with no mutation on failure, exact oldest-first deduction + turn + event + persistence, prereq chain unlock, WEAPONS build gated 409 → succeeds after research, REACTOR upgrade cap raised by REACTOR OVERCLOCK; e2e — SKILL TREE tab researches WEAPONS SYSTEMS via the UI (card flips to RESEARCHED) and the previously-disabled BUILD NEW on WEAPONS becomes enabled and builds, plus tech state survives the mid-run container restart.
+
+## v0.6.0 — 2026-09-28 23:46
+- SHIP SYSTEMS tab — expand / upgrade / build ship systems + save backfill plumbing (issue #8): the first spend-side game loop on top of issue #7's crew, plus a root-cause fix for saves created by older code lacking data newer code seeds. Single-player, no auth, by design.
+- Backfill plumbing: `schema_version` INTEGER added to `saves` (NULL = v1). `ensureSave` now runs ordered IDEMPOTENT backfill steps for anything below current — v2: every system without planets gets its generated bodies (same `(seed, systemId)` derivation as fresh generation), v3: starting crew if no rows. New games get the current version directly. `lib/db/client.ts` open() carries an idempotent `ALTER TABLE ... ADD COLUMN` guard for files created before the column existed — old saves open fine and backfill on first read, so DB wipes are no longer needed when deploying new versions.
+- New table (`lib/db/schema.ts` + DDL): `ship_systems` (id/save_id/type/level/capacity, UNIQUE(save_id,type)). `built` is derived, not stored — level > 0 means built; unbuilt rows sit at level/capacity 0. Starting ship seeded on new game AND as backfill step v4: core types (HULL, REACTOR, LIFE SUPPORT, NAV COMPUTER, COMMS ARRAY) built at base values, WEAPONS unbuilt until a build action.
+- Cost model (`lib/game/ship-costs.ts`, pure — imported by both the API and the UI so affordability can't drift): UPGRADE costs `level` units of any resource (capped at MAX_LEVEL 5), EXPAND costs `capacity` units of any resource (capped at MAX_CAPACITY 10), BUILD costs a flat 3 parts. Consumption takes from the oldest cargo row of the required kind first, deleting rows that hit zero; an unaffordable action mutates nothing.
+- Ship actions (`lib/game/ship.ts`): `upgradeSystem` / `expandSystem` / `buildSystem` — validate (404 unknown id/type, 409 not built / already built / at cap, 422 insufficient inventory), spend the cost, bump level/capacity or build at base values, cost one turn and write an event each.
+- New endpoints: `GET /api/ship` → `{systems:[{id,type,level,capacity,built}],inventory,turn}`; `POST /api/ship/upgrade {systemId}`, `POST /api/ship/expand {systemId}`, `POST /api/ship/build {type}` — each returns the fresh ship state. OpenAPI spec in code updated (10 paths).
+- SHIP SYSTEMS tab now renders REAL data: cards show type + level/capacity with UPGRADE / EXPAND buttons per built card and BUILD NEW for unbuilt types, disabled when unaffordable or capped; each action's response is applied directly (no polling). Left column mirrors live state too — the SHIP SYSTEMS panel lists every system with its status/level/capacity + an N ONLINE badge, and VESSEL METRICS bars are driven by real values (hull/reactor from system levels, crew roster vs a cap of 6). Placeholder constants for both removed; other tabs keep theirs until their issues land.
+- Tests: unit — backfill upgrades a hand-built v1 save in place (deterministic vs fresh generation, idempotent), starting ship seeding, cost validation with no mutation on failure, exact oldest-first inventory deduction, level/capacity caps, build-once, turn + event per action; e2e — SHIP SYSTEMS tab performs one affordable UPGRADE/BUILD via the UI after a bounded scan loop until something is affordable (asserting card + left column reflect it), and ship state survives the mid-run container restart.
+
+## v0.5.0 — 2026-09-28 22:51
+- CREW tab — crew roster with good/bad traits (issue #7): the ship's people on top of issue #6's exploration loop. Single-player, no auth, by design. Display + arrival only — no dismiss/assign actions yet.
+- New table (`lib/db/schema.ts` + DDL in `lib/db/client.ts`): `crew` (id/save_id/name/role/trait_good/trait_bad/origin). Origin is 'STARTING CREW' for the seeded crew or '<planet>, <system>' for members found while exploring.
+- Pure seeded crew generation (`lib/game/crew.ts`, same pattern as world.ts): name pools (16 first × 22 last, unique per roster), role pool of 8, good/bad trait pools of 10 each. `generateStartingCrew` gives a new game 2–3 members with unique names and roles; `rollCrewMember` finds a joining member on ~18% of scans (`CREW_CHANCE = 0.18`).
+- Starting crew is seeded in `ensureSave` from the save seed via `startingCrewRng(seed)` — same per-save derivation pattern as bodies/exploration, so a given seed always starts with the same crew.
+- Exploration extended: the crew roll draws from the SAME per-planet rng stream as the resource/part haul (called after it in `explorePlanet`), so outcomes stay deterministic per save+planet and existing hauls are unchanged. Found members join the roster with origin = '<planet>, <system>'; each body can only be scanned once, so no duplicate joins.
+- New endpoint: `GET /api/crew` → `[{id,name,role,trait_good,trait_bad,origin}]` in join order (auto-initializes like the others). `POST /api/explore` responses now also carry `crewFound` (the joining member or null). OpenAPI spec in code (`lib/openapi.ts`) updated for both.
+- CREW tab now renders REAL data: fetches `/api/crew` on mount (Radix unmounts inactive tabs, so opening the tab always refetches — no polling), cards show name + role, the good (+) and bad (−) traits and an ORIGIN line. Placeholder crew constants removed for this tab only — other tabs keep theirs until their issues land.
+
 ## v0.4.0 — 2026-09-28 22:17
 - LOCAL SYSTEM tab — planet list + exploration to find things (issue #6): the first in-system game loop on top of issue #5's save/world foundation. Single-player, no auth, by design.
 - New tables (`lib/db/schema.ts` + DDL in `lib/db/client.ts`): `planets` (id/system_id/parent_id/name/type/hazard/explored — planets have parent_id NULL, moons point at their planet) and `inventory_items` (id/save_id/kind[name]/qty — the dumb-simple cargo hold SHIP SYSTEMS (#8) will spend from later).

app/api/admin/tables/[name]/rows/route.ts

@@ -0,0 +1,55 @@
+import { getGameDb } from '@/lib/db/client'
+import { AdminError, deleteAdminRow, insertAdminRow, readAdminRows, updateAdminRow } from '@/lib/db/admin'
+
+// #38 — rows of one admin table: GET (capped list), POST (insert), PATCH ({key, values}), DELETE ({key}).
+async function jsonBody(req: Request): Promise<Record<string, unknown>> {
+  let body: unknown
+  try {
+    body = await req.json()
+  } catch {
+    throw new AdminError(400, 'Invalid JSON body')
+  }
+  if (typeof body !== 'object' || body === null || Array.isArray(body)) throw new AdminError(400, 'Body must be a JSON object')
+  return body as Record<string, unknown>
+}
+
+async function run<T>(fn: () => Promise<T>): Promise<Response> {
+  try {
+    return Response.json(await fn())
+  } catch (err) {
+    if (err instanceof AdminError) return Response.json({ error: err.message }, { status: err.status })
+    throw err
+  }
+}
+
+export async function GET(req: Request, ctx: { params: Promise<{ name: string }> }) {
+  const db = await getGameDb()
+  const { name } = await ctx.params
+  const url = new URL(req.url)
+  const limitRaw = url.searchParams.get('limit')
+  const offsetRaw = url.searchParams.get('offset')
+  const limit = limitRaw === null ? 50 : Number(limitRaw)
+  const offset = offsetRaw === null ? 0 : Number(offsetRaw)
+  return run(() => readAdminRows(db, name, limit, offset))
+}
+
+export async function POST(req: Request, ctx: { params: Promise<{ name: string }> }) {
+  const db = await getGameDb()
+  const { name } = await ctx.params
+  return run(async () => insertAdminRow(db, name, await jsonBody(req)))
+}
+
+export async function PATCH(req: Request, ctx: { params: Promise<{ name: string }> }) {
+  const db = await getGameDb()
+  const { name } = await ctx.params
+  return run(async () => {
+    const body = await jsonBody(req)
+    return updateAdminRow(db, name, body.key, body.values)
+  })
+}
+
+export async function DELETE(req: Request, ctx: { params: Promise<{ name: string }> }) {
+  const db = await getGameDb()
+  const { name } = await ctx.params
+  return run(async () => deleteAdminRow(db, name, (await jsonBody(req)).key))
+}

app/api/admin/tables/route.ts

@@ -0,0 +1,8 @@
+import { getGameDb } from '@/lib/db/client'
+import { listAdminTables } from '@/lib/db/admin'
+
+// #38 — admin DB CRUD, no auth by explicit request (ponytail: add auth before exposing beyond the dev host).
+export async function GET() {
+  const db = await getGameDb()
+  return Response.json(await listAdminTables(db))
+}

app/api/crew-team.ts

@@ -0,0 +1,35 @@
+import { MAX_TEAM_SIZE } from '@/lib/game/crew'
+
+// The crew-team half of a queueing-action body (leadCrewId + helperCrewIds) plus the route-layer
+// team rules: one task team, distinct members, the size cap. queueTask (lib) deliberately does
+// NOT validate teams, so this shared parse is the single place the team 400s live — extracted
+// verbatim from the 5a jump/explore crew-parse blocks so the six queueing routes can't drift.
+// Returns a 400-shaped error object instead of throwing, so the caller maps it to a response.
+
+export type CrewTeam =
+  | { leadCrewId: number; helperCrewIds: number[] }
+  | { error: string; status: number }
+
+export function parseCrewTeam(body: unknown): CrewTeam {
+  const leadCrewId = (body as { leadCrewId?: unknown }).leadCrewId
+  if (typeof leadCrewId !== 'number' || !Number.isInteger(leadCrewId)) {
+    return { error: 'leadCrewId must be an integer', status: 400 }
+  }
+  let helperCrewIds: number[] = []
+  const rawHelpers = (body as { helperCrewIds?: unknown }).helperCrewIds
+  if (rawHelpers !== undefined) {
+    if (!Array.isArray(rawHelpers) || !rawHelpers.every((h) => typeof h === 'number' && Number.isInteger(h))) {
+      return { error: 'helperCrewIds must be an array of integers', status: 400 }
+    }
+    helperCrewIds = rawHelpers
+  }
+  // Team rules (route layer, not queueTask's): one task team, distinct members, size cap.
+  const team = [leadCrewId, ...helperCrewIds]
+  if (new Set(team).size !== team.length) {
+    return { error: 'crew members must be unique', status: 400 }
+  }
+  if (team.length > MAX_TEAM_SIZE) {
+    return { error: `a task team holds at most ${MAX_TEAM_SIZE} crew members`, status: 400 }
+  }
+  return { leadCrewId, helperCrewIds }
+}

app/api/crew/route.ts

@@ -0,0 +1,9 @@
+import { getGameDb } from '@/lib/db/client'
+import { getCrewState } from '@/lib/game/save'
+
+// The ship's crew roster wrapped with the snapshot task queue: { crew, tasks } — the roster
+// (starting crew plus members found while exploring) and the ACTIVE + PENDING queue. Auto-initializes on first hit.
+export async function GET() {
+  const db = await getGameDb()
+  return Response.json(await getCrewState(db))
+}

app/api/events/route.ts

@@ -0,0 +1,21 @@
+import { getGameDb } from '@/lib/db/client'
+import { ensureSave } from '@/lib/game/save'
+import { EventError, getEvents, parseEventLimit } from '@/lib/game/events'
+
+// The latest game events, newest first; auto-initializes on first hit.
+export async function GET(req: Request) {
+  const db = await getGameDb()
+  await ensureSave(db) // getEvents assumes a save exists
+
+  let limit: number
+  try {
+    limit = parseEventLimit(new URL(req.url).searchParams.get('limit'))
+  } catch (err) {
+    if (err instanceof EventError) {
+      return Response.json({ error: err.message }, { status: err.status })
+    }
+    throw err
+  }
+
+  return Response.json(await getEvents(db, limit))
+}

app/api/explore/route.test.ts

@@ -0,0 +1,84 @@
+// Handler-level tests for the queueing explore route (Task 5a): POST /api/explore with a crew
+// team queues an EXPLORE row instead of resolving instantly — same system snapshot (findings key
+// kept, empty), same pre-check codes, no turn spent at queue time.
+import { eq } from 'drizzle-orm'
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getSystemState, type SystemState } from '@/lib/game/save'
+import { addCrew, buildWorldFixture, insertTaskRow } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-explore-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+const post = (body: unknown) => POST(new Request('http://localhost/api/explore', { method: 'POST', body: JSON.stringify(body) }))
+
+describe('POST /api/explore (5a)', () => {
+  it('queues an EXPLORE: row with type/payload, turn unchanged, planet not yet scanned, no haul', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    const [before] = await db.db.select().from(schema.saves)
+    const invBefore = (await db.db.select().from(schema.inventoryItems)).map((i) => [i.kind, i.name, i.qty] as const)
+
+    const res = await post({ planetId: f.p0, leadCrewId: c1, helperCrewIds: [c2] })
+    expect(res.status).toBe(200)
+    const body = await res.json()
+    const sys = await getSystemState(db)
+    for (const k of Object.keys(sys) as (keyof SystemState)[]) expect(body[k]).toEqual(sys[k]) // today's system snapshot part unchanged; the findings key stays, empty (JC-2)
+    const [row] = await db.db.select().from(schema.tasks)
+    expect(row).toMatchObject({ type: 'EXPLORE', leadCrewId: c1, status: 'ACTIVE', queuedAtTurn: before.turn })
+    expect(JSON.parse(row.helpers)).toEqual([c2]) // helpers is a JSON text column
+    expect(JSON.parse(row.payload)).toEqual({ planetId: f.p0 })
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
+    expect((await db.db.select().from(schema.planets)).find((p) => p.id === f.p0)!.explored).toBe(false) // the effect waits for the tick
+    expect((await db.db.select().from(schema.inventoryItems)).map((i) => [i.kind, i.name, i.qty] as const)).toEqual(invBefore) // no haul yet
+  })
+
+  it('unknown crew → 404 (queueTask)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    expect((await post({ planetId: f.p0, leadCrewId: 999 })).status).toBe(404)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+
+  it('busy helper → 409, nothing queued', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p1 }, leadCrewId: c2, helpers: [], duration: 2, remaining: 2, status: 'ACTIVE', queuedAtTurn: 1 })
+    expect((await post({ planetId: f.p0, leadCrewId: c1, helperCrewIds: [c2] })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(1)
+  })
+
+  it('already scanned → 409 (existing pre-check, existing code)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    await db.db.update(schema.planets).set({ explored: true }).where(eq(schema.planets.id, f.p0))
+    expect((await post({ planetId: f.p0, leadCrewId: c1 })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+})

app/api/explore/route.ts

@@ -1,8 +1,13 @@
 import { getGameDb } from '@/lib/db/client'
-import { ExploreError, explorePlanet } from '@/lib/game/save'
+import { parseCrewTeam } from '@/app/api/crew-team'
+import { checkExploreTarget, ExploreError, getSystemState, queueStateFromSave, saveTaskRow } from '@/lib/game/save'
+import { queueTask, TaskError } from '@/lib/game/tasks'
 
-// Scan one body of the current system. Body: { "planetId": number }. Returns the fresh
-// system state plus what this scan found. Costs a turn; each body can only be scanned once.
+// Scan one body of the current system: assign the crew team (lead + helpers) and queue the
+// EXPLORE task — the haul, the scanned flag, the crew roll and the event land when the task
+// completes on the turn tick (runTurn). Body: { planetId, leadCrewId, helperCrewIds? }.
+// Queueing spends no turn; returns the same system snapshot as the instant scan, with the
+// findings key empty until the scan resolves (JC-2).
 export async function POST(req: Request) {
   let body: unknown
   try {
@@ -15,12 +20,20 @@ export async function POST(req: Request) {
   if (typeof planetId !== 'number' || !Number.isInteger(planetId)) {
     return Response.json({ error: 'planetId must be an integer' }, { status: 400 })
   }
+  const team = parseCrewTeam(body)
+  if ('error' in team) {
+    return Response.json({ error: team.error }, { status: team.status })
+  }
 
   try {
     const db = await getGameDb()
-    return Response.json(await explorePlanet(db, planetId))
+    await checkExploreTarget(db, planetId) // existing pre-checks: 404 unknown body · 409 already scanned
+    const state = await queueStateFromSave(db)
+    const { task } = queueTask(state, { type: 'EXPLORE', payload: { planetId }, leadCrewId: team.leadCrewId, helperCrewIds: team.helperCrewIds })
+    await saveTaskRow(db, task) // inventory is unchanged until the scan resolves — no hold write
+    return Response.json({ ...(await getSystemState(db)), outcome: [], crewFound: null })
   } catch (err) {
-    if (err instanceof ExploreError) {
+    if (err instanceof ExploreError || err instanceof TaskError) {
       return Response.json({ error: err.message }, { status: err.status })
     }
     throw err

app/api/jump/route.test.ts

@@ -0,0 +1,109 @@
+// Handler-level tests for the queueing jump route (Task 5a): POST /api/jump with a crew
+// team queues a JUMP row instead of resolving instantly — same snapshots, same pre-check
+// codes, no turn spent at queue time.
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getWorldState } from '@/lib/game/save'
+import { addCrew, buildWorldFixture, insertTaskRow } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-jump-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+const post = (body: unknown) => POST(new Request('http://localhost/api/jump', { method: 'POST', body: JSON.stringify(body) }))
+
+describe('POST /api/jump (5a)', () => {
+  it('queues a JUMP: row with type/payload/status, turn unchanged, snapshot preserved, ship not moved', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    const [before] = await db.db.select().from(schema.saves)
+
+    const res = await post({ systemId: f.sys1, leadCrewId: c1, helperCrewIds: [c2] })
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual(await getWorldState(db)) // the same fresh snapshot as today — queueing changes nothing else
+    const [row] = await db.db.select().from(schema.tasks)
+    expect(row).toMatchObject({ type: 'JUMP', leadCrewId: c1, status: 'ACTIVE', queuedAtTurn: before.turn })
+    expect(JSON.parse(row.helpers)).toEqual([c2]) // helpers is a JSON text column
+    expect(JSON.parse(row.payload)).toEqual({ systemId: f.sys1, hops: 1 }) // route-computed via the existing reachability logic
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn) // no turn increment
+    expect((await db.db.select().from(schema.solarSystems)).filter((s) => s.isCurrent).map((s) => s.id)).toEqual([1]) // the effect waits for the tick
+  })
+
+  it('unknown crew → 404 (queueTask)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    expect((await post({ systemId: f.sys1, leadCrewId: 999 })).status).toBe(404)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+
+  it('busy helper → 409, nothing queued', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p0 }, leadCrewId: c2, helpers: [], duration: 2, remaining: 2, status: 'ACTIVE', queuedAtTurn: 1 })
+    expect((await post({ systemId: f.sys1, leadCrewId: c1, helperCrewIds: [c2] })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(1)
+  })
+
+  it('a jump in transit → 409 (blocks any new task)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    await insertTaskRow(db, { type: 'JUMP', payload: { systemId: f.sys1, hops: 1 }, leadCrewId: c2, helpers: [], duration: 3, remaining: 3, status: 'ACTIVE', queuedAtTurn: 1 })
+    expect((await post({ systemId: f.sys1, leadCrewId: c1 })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(1)
+  })
+
+  it('a jump already pending → second jump 409', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p0 }, leadCrewId: c1, helpers: [], duration: 2, remaining: 2, status: 'ACTIVE', queuedAtTurn: 1 })
+    await insertTaskRow(db, { type: 'JUMP', payload: { systemId: f.sys1, hops: 1 }, leadCrewId: c1, helpers: [], duration: 2, remaining: 2, status: 'PENDING', queuedAtTurn: 1 }) // lead chains behind its own ACTIVE
+    expect((await post({ systemId: f.sys1, leadCrewId: c2 })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(2)
+  })
+
+  it('unreachable target → 409 (existing pre-check, existing code)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    expect((await post({ systemId: f.farSystem, leadCrewId: c1 })).status).toBe(409) // JC-4: a beyond-reach system in the fixture; add it to buildWorldFixture if absent
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+
+  it('malformed crew fields → 400, nothing queued', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    expect((await post({ systemId: f.sys1 })).status).toBe(400) // leadCrewId is required
+    expect((await post({ systemId: f.sys1, leadCrewId: 'x' })).status).toBe(400)
+    expect((await post({ systemId: f.sys1, leadCrewId: 1.5 })).status).toBe(400)
+    expect((await post({ systemId: f.sys1, leadCrewId: 1, helperCrewIds: 'nope' })).status).toBe(400)
+    expect((await post({ systemId: f.sys1, leadCrewId: 1, helperCrewIds: [1, 'x'] })).status).toBe(400)
+    expect((await post('not json at all' as unknown)).status).toBe(400)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+})

app/api/jump/route.ts

@@ -1,7 +1,12 @@
 import { getGameDb } from '@/lib/db/client'
-import { JumpError, jumpToSystem } from '@/lib/game/save'
+import { parseCrewTeam } from '@/app/api/crew-team'
+import { checkJumpTarget, getWorldState, JumpError, queueStateFromSave, saveTaskRow } from '@/lib/game/save'
+import { queueTask, TaskError } from '@/lib/game/tasks'
 
-// Jump to an adjacent solar system. Body: { "systemId": number }. Returns the fresh world state.
+// Jump to a system within range: assign the crew team (lead + helpers) and queue the JUMP
+// task — the move lands when the task completes on the turn tick (runTurn). Body:
+// { systemId, leadCrewId, helperCrewIds? }. Queueing spends no turn; returns the same fresh
+// world state as the instant jump did.
 export async function POST(req: Request) {
   let body: unknown
   try {
@@ -14,12 +19,20 @@ export async function POST(req: Request) {
   if (typeof systemId !== 'number' || !Number.isInteger(systemId)) {
     return Response.json({ error: 'systemId must be an integer' }, { status: 400 })
   }
+  const team = parseCrewTeam(body)
+  if ('error' in team) {
+    return Response.json({ error: team.error }, { status: team.status })
+  }
 
   try {
     const db = await getGameDb()
-    return Response.json(await jumpToSystem(db, systemId))
+    const hops = await checkJumpTarget(db, systemId) // existing pre-checks: 404 unknown · 409 already there / out of range
+    const state = await queueStateFromSave(db)
+    const { task } = queueTask(state, { type: 'JUMP', payload: { systemId, hops }, leadCrewId: team.leadCrewId, helperCrewIds: team.helperCrewIds })
+    await saveTaskRow(db, task) // inventory is unchanged for a JUMP — no hold write
+    return Response.json(await getWorldState(db))
   } catch (err) {
-    if (err instanceof JumpError) {
+    if (err instanceof JumpError || err instanceof TaskError) {
       return Response.json({ error: err.message }, { status: err.status })
     }
     throw err

app/api/missions/[id]/accept/route.test.ts

@@ -0,0 +1,100 @@
+// Handler-level tests for mission accept (Task 5a(ii)): instant and free per the approved
+// spec (JC-19) — the AVAILABLE → ACTIVE flip and the event land at the current turn, no
+// turn is spent, no crew params; the board response shape is unchanged.
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getMissions } from '@/lib/game/missions'
+import { buildWorldFixture } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-mission-accept-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+const post = (id: string) => POST(new Request(`http://localhost/api/missions/${id}/accept`, { method: 'POST' }), { params: Promise.resolve({ id }) })
+
+// The fixture suite mints no mission rows (JC-6) — insert exactly what the test needs (same
+// shape as the insertMission helper in lib/game/missions.test.ts, plus a state override).
+async function insertMission(
+  db: GameDb,
+  fields: { type: string; description: string; targetSystemId?: number | null; conditionKind?: string | null; progressTarget?: number; rewardKind?: string; rewardQty?: number; state?: string },
+): Promise<number> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db
+    .insert(schema.missions)
+    .values({ saveId: save.id, type: fields.type, description: fields.description, targetSystemId: fields.targetSystemId ?? null, conditionKind: fields.conditionKind ?? null, progressTarget: fields.progressTarget ?? 1, rewardKind: fields.rewardKind ?? 'resource', rewardQty: fields.rewardQty ?? 1, state: fields.state ?? 'AVAILABLE' })
+    .returning()
+  return row.id
+}
+
+describe('POST /api/missions/[id]/accept (5a(ii))', () => {
+  it('happy: mission goes active, board returned, turn unchanged (free)', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const id = await insertMission(db, { type: 'DELIVER', description: 'Jump to Outpost', targetSystemId: 2 })
+    const [before] = await db.db.select().from(schema.saves)
+
+    const res = await post(String(id))
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual(await getMissions(db)) // same board shape as today
+    expect((await db.db.select().from(schema.missions)).find((m) => m.id === id)!.state).toBe('ACTIVE') // AVAILABLE → active
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn) // free — no turn cost
+  })
+
+  it('non-integer id → 400, nothing changes', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [before] = await db.db.select().from(schema.saves)
+    expect((await post('abc')).status).toBe(400)
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
+  })
+
+  it('unknown id → 404, nothing changes', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [before] = await db.db.select().from(schema.saves)
+    expect((await post('999')).status).toBe(404)
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
+  })
+
+  it('not AVAILABLE → 409 (existing code), nothing changes', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const id = await insertMission(db, { type: 'EXPLORE', description: 'Scan 2 bodies', progressTarget: 2, state: 'ACTIVE' })
+    const [before] = await db.db.select().from(schema.saves)
+    expect((await post(String(id))).status).toBe(409)
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
+  })
+
+  it('a mission already active → 409 (existing code), the target stays AVAILABLE', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    await insertMission(db, { type: 'FIND', description: 'Find a part while scanning', conditionKind: 'part', state: 'ACTIVE' })
+    const id = await insertMission(db, { type: 'EXPLORE', description: 'Scan 2 bodies', progressTarget: 2 })
+    const [before] = await db.db.select().from(schema.saves)
+    expect((await post(String(id))).status).toBe(409)
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
+    expect((await db.db.select().from(schema.missions)).find((m) => m.id === id)!.state).toBe('AVAILABLE')
+  })
+})

app/api/missions/[id]/accept/route.ts

@@ -0,0 +1,25 @@
+import { getGameDb } from '@/lib/db/client'
+import { ensureSave } from '@/lib/game/save'
+import { acceptMission, MissionError } from '@/lib/game/missions'
+
+// Accept an AVAILABLE mission — it becomes the single active one. Instant and free (no turn,
+// no body); returns the fresh board.
+export async function POST(_req: Request, ctx: { params: Promise<{ id: string }> }) {
+  const db = await getGameDb()
+  await ensureSave(db) // acceptMission assumes a save exists
+
+  const { id } = await ctx.params
+  const missionId = Number(id)
+  if (!Number.isInteger(missionId)) {
+    return Response.json({ error: 'mission id must be an integer' }, { status: 400 })
+  }
+
+  try {
+    return Response.json(await acceptMission(db, missionId))
+  } catch (err) {
+    if (err instanceof MissionError) {
+      return Response.json({ error: err.message }, { status: err.status })
+    }
+    throw err
+  }
+}

app/api/missions/route.ts

@@ -0,0 +1,10 @@
+import { getGameDb } from '@/lib/db/client'
+import { ensureSave } from '@/lib/game/save'
+import { getMissions } from '@/lib/game/missions'
+
+// The full mission board for the single active save; auto-initializes on first hit.
+export async function GET() {
+  const db = await getGameDb()
+  await ensureSave(db) // top-up inside getMissions assumes a save exists
+  return Response.json(await getMissions(db))
+}

app/api/research/route.test.ts

@@ -0,0 +1,103 @@
+// Handler-level tests for the queueing research route (Task 5a(ii)): POST /api/research with
+// a crew team queues a RESEARCH row instead of resolving instantly — the tech stays
+// unresearched until the task completes on the turn tick, the cost comes out of the cargo
+// hold at queue time, same snapshot shape, same pre-check codes, no turn spent at queue time.
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getTechState } from '@/lib/game/research'
+import { TECHS, type TechDef } from '@/lib/game/tech'
+import { addCrew, buildWorldFixture } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-research-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+const post = (body: unknown) => POST(new Request('http://localhost/api/research', { method: 'POST', body: JSON.stringify(body) }))
+
+// The fixture suite mints no tech rows (JC-6) — insert exactly what the test needs from the
+// pure TECHS definitions (WEAPONS_SYSTEMS: part cost, no prerequisites). The happy path seeds
+// every row, like the new-game backfill: the snapshot read (getTechState) maps every TECHS def.
+async function insertTech(db: GameDb, def: TechDef, over: { researched?: boolean } = {}) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db
+    .insert(schema.tech)
+    .values({ saveId: save.id, slug: def.slug, name: def.name, costKind: def.costKind, costQty: def.costQty, prerequisites: def.prereqs.join(','), effect: def.effect, researched: over.researched ?? false })
+    .returning()
+  return row
+}
+
+// The fixture suite mints no cargo hold (JC-6) — seed rows directly.
+async function seedHold(db: GameDb, rows: { kind: 'resource' | 'part'; name: string; qty: number }[]) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  for (const r of rows) {
+    await db.db.insert(schema.inventoryItems).values({ saveId: save.id, ...r })
+  }
+}
+
+describe('POST /api/research (5a(ii))', () => {
+  it('happy: row with type/payload, turn unchanged, cost deducted, tech not researched yet', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const def = TECHS[0] // WEAPONS_SYSTEMS — the tech row's cost comes from its TECHS def
+    for (const d of TECHS) await insertTech(db, d) // every row, like the new-game backfill
+    const tech = (await db.db.select().from(schema.tech)).find((t) => t.slug === def.slug)!
+    await seedHold(db, [{ kind: def.costKind, name: def.costKind === 'resource' ? 'resource' : 'part', qty: def.costQty }])
+    const [before] = await db.db.select().from(schema.saves)
+
+    const res = await post({ techId: tech.id, leadCrewId: c1 })
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual(await getTechState(db)) // the same snapshot shape the instant action returned
+    const [row] = await db.db.select().from(schema.tasks)
+    expect(row).toMatchObject({ type: 'RESEARCH', leadCrewId: c1, status: 'ACTIVE', queuedAtTurn: before.turn })
+    expect(JSON.parse(row.helpers)).toEqual([]) // helpers is a JSON text column
+    expect(JSON.parse(row.payload)).toEqual({ techId: tech.id })
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn) // no turn increment
+    expect(await db.db.select().from(schema.inventoryItems)).toHaveLength(0) // whole cost deducted at queue time
+    expect((await db.db.select().from(schema.tech)).find((t) => t.id === tech.id)!.researched).toBe(false) // the effect waits for the tick
+  })
+
+  it('unaffordable → 422 (existing spendItems message), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const def = TECHS[0]
+    const tech = await insertTech(db, def)
+    await seedHold(db, [{ kind: def.costKind, name: def.costKind === 'resource' ? 'resource' : 'part', qty: def.costQty - 1 }])
+    const res = await post({ techId: tech.id, leadCrewId: c1 })
+    expect(res.status).toBe(422)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+
+  it('already researched → 409 (existing pre-check, existing code), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const def = TECHS[0]
+    const tech = await insertTech(db, def, { researched: true })
+    expect((await post({ techId: tech.id, leadCrewId: c1 })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+})

app/api/research/route.ts

@@ -0,0 +1,43 @@
+import { getGameDb } from '@/lib/db/client'
+import { parseCrewTeam } from '@/app/api/crew-team'
+import { getTechState, checkResearchPreconditions, ResearchError } from '@/lib/game/research'
+import { queueStateFromSave, saveInventory, saveTaskRow } from '@/lib/game/save'
+import { queueTask, TaskError } from '@/lib/game/tasks'
+
+// Research one tech: assign the crew team (lead + helpers) and queue the RESEARCH task — the
+// tech cost is deducted at queue time and the tech is marked researched (unlock effect
+// included) when the task completes on the turn tick (runTurn). Body:
+// { techId, leadCrewId, helperCrewIds? }. Queueing spends no turn; returns the same fresh
+// tech tree state the instant action returned.
+export async function POST(req: Request) {
+  let body: unknown
+  try {
+    body = await req.json()
+  } catch {
+    return Response.json({ error: 'Invalid JSON body' }, { status: 400 })
+  }
+
+  const techId = (body as { techId?: unknown }).techId
+  if (typeof techId !== 'number' || !Number.isInteger(techId)) {
+    return Response.json({ error: 'techId must be an integer' }, { status: 400 })
+  }
+  const team = parseCrewTeam(body)
+  if ('error' in team) {
+    return Response.json({ error: team.error }, { status: team.status })
+  }
+
+  try {
+    const db = await getGameDb()
+    await checkResearchPreconditions(db, techId) // existing pre-checks: 404 unknown · 409 already researched / missing prereq
+    const state = await queueStateFromSave(db)
+    const { task, inventory } = queueTask(state, { type: 'RESEARCH', payload: { techId }, leadCrewId: team.leadCrewId, helperCrewIds: team.helperCrewIds })
+    await saveTaskRow(db, task)
+    await saveInventory(db, inventory) // the cost was deducted at queue time
+    return Response.json(await getTechState(db))
+  } catch (err) {
+    if (err instanceof ResearchError || err instanceof TaskError) {
+      return Response.json({ error: err.message }, { status: err.status })
+    }
+    throw err
+  }
+}

app/api/ship/build/route.test.ts

@@ -0,0 +1,96 @@
+// Handler-level tests for the queueing ship-build route (Task 5a(ii)): POST /api/ship/build
+// with a crew team queues a SHIP_BUILD row instead of resolving instantly — the build at
+// base values waits for the turn tick, the flat parts cost comes out of the cargo hold at
+// queue time, same snapshot shape, same pre-check codes, no turn spent at queue time.
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getShipState } from '@/lib/game/ship'
+import { BUILD_PART_COST } from '@/lib/game/ship-costs'
+import { addCrew, buildWorldFixture } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-ship-build-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+const post = (body: unknown) => POST(new Request('http://localhost/api/ship/build', { method: 'POST', body: JSON.stringify(body) }))
+
+// The fixture suite mints no ship rows (JC-6) — insert exactly what the test needs. HULL is
+// the only type that is unbuilt by default AND has no build gate (WEAPONS is gated behind
+// the WEAPONS SYSTEMS tech, which the fixture leaves unresearched).
+async function insertSystem(db: GameDb, over: { type: string; level: number; capacity: number }) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db.insert(schema.shipSystems).values({ saveId: save.id, ...over }).returning()
+  return row
+}
+
+// The fixture suite mints no cargo hold (JC-6) — seed rows directly.
+async function seedHold(db: GameDb, rows: { kind: 'resource' | 'part'; name: string; qty: number }[]) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  for (const r of rows) {
+    await db.db.insert(schema.inventoryItems).values({ saveId: save.id, ...r })
+  }
+}
+
+describe('POST /api/ship/build (5a(ii))', () => {
+  it('happy: row with type/payload, turn unchanged, parts deducted, not built yet', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'HULL', level: 0, capacity: 0 }) // unbuilt, no gate
+    await seedHold(db, [{ kind: 'part', name: 'part', qty: BUILD_PART_COST }]) // exactly the existing flat cost
+    const [before] = await db.db.select().from(schema.saves)
+
+    const res = await post({ type: sys.type, leadCrewId: c1 })
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual(await getShipState(db)) // the same snapshot shape the instant action returned
+    const [row] = await db.db.select().from(schema.tasks)
+    expect(row).toMatchObject({ type: 'SHIP_BUILD', leadCrewId: c1, status: 'ACTIVE', queuedAtTurn: before.turn })
+    expect(JSON.parse(row.helpers)).toEqual([]) // helpers is a JSON text column
+    expect(JSON.parse(row.payload)).toEqual({ type: sys.type })
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn) // no turn increment
+    expect(await db.db.select().from(schema.inventoryItems)).toHaveLength(0) // whole cost deducted at queue time
+    expect((await db.db.select().from(schema.shipSystems)).find((s) => s.id === sys.id)!.level).toBe(0) // the effect waits for the tick
+  })
+
+  it('unaffordable → 422 (existing spendItems message), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    await insertSystem(db, { type: 'HULL', level: 0, capacity: 0 })
+    await seedHold(db, [{ kind: 'part', name: 'part', qty: BUILD_PART_COST - 1 }])
+    const res = await post({ type: 'HULL', leadCrewId: c1 })
+    expect(res.status).toBe(422)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+
+  it('already built → 409 (existing pre-check, existing code), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'HULL', level: 1, capacity: 2 }) // built at base values
+    expect((await post({ type: sys.type, leadCrewId: c1 })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+})

app/api/ship/build/route.ts

@@ -0,0 +1,43 @@
+import { getGameDb } from '@/lib/db/client'
+import { parseCrewTeam } from '@/app/api/crew-team'
+import { checkBuildPreconditions, getShipState, ShipError } from '@/lib/game/ship'
+import { queueStateFromSave, saveInventory, saveTaskRow } from '@/lib/game/save'
+import { queueTask, TaskError } from '@/lib/game/tasks'
+
+// Build an unbuilt ship system type at base values: assign the crew team (lead + helpers)
+// and queue the SHIP_BUILD task — the flat parts cost is deducted at queue time and the
+// build lands when the task completes on the turn tick (runTurn). Body:
+// { type, leadCrewId, helperCrewIds? }. Queueing spends no turn; returns the same fresh
+// ship state the instant action returned.
+export async function POST(req: Request) {
+  let body: unknown
+  try {
+    body = await req.json()
+  } catch {
+    return Response.json({ error: 'Invalid JSON body' }, { status: 400 })
+  }
+
+  const type = (body as { type?: unknown }).type
+  if (typeof type !== 'string' || type.length === 0) {
+    return Response.json({ error: 'type must be a non-empty string' }, { status: 400 })
+  }
+  const team = parseCrewTeam(body)
+  if ('error' in team) {
+    return Response.json({ error: team.error }, { status: team.status })
+  }
+
+  try {
+    const db = await getGameDb()
+    await checkBuildPreconditions(db, type) // existing pre-checks: 404 unknown type · 409 already built / build gate
+    const state = await queueStateFromSave(db)
+    const { task, inventory } = queueTask(state, { type: 'SHIP_BUILD', payload: { type }, leadCrewId: team.leadCrewId, helperCrewIds: team.helperCrewIds })
+    await saveTaskRow(db, task)
+    await saveInventory(db, inventory) // the cost was deducted at queue time
+    return Response.json(await getShipState(db))
+  } catch (err) {
+    if (err instanceof ShipError || err instanceof TaskError) {
+      return Response.json({ error: err.message }, { status: err.status })
+    }
+    throw err
+  }
+}

app/api/ship/expand/route.test.ts

@@ -0,0 +1,94 @@
+// Handler-level tests for the queueing ship-expand route (Task 5a(ii)): POST /api/ship/expand
+// with a crew team queues a SHIP_EXPAND row instead of resolving instantly — the capacity
+// bump waits for the turn tick, the cost comes out of the cargo hold at queue time, same
+// snapshot shape, same pre-check codes, no turn spent at queue time.
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getShipState } from '@/lib/game/ship'
+import { expandCost } from '@/lib/game/ship-costs'
+import { addCrew, buildWorldFixture } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-ship-expand-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+const post = (body: unknown) => POST(new Request('http://localhost/api/ship/expand', { method: 'POST', body: JSON.stringify(body) }))
+
+// The fixture suite mints no ship rows (JC-6) — insert exactly what the test needs.
+async function insertSystem(db: GameDb, over: { type: string; level: number; capacity: number }) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db.insert(schema.shipSystems).values({ saveId: save.id, ...over }).returning()
+  return row
+}
+
+// The fixture suite mints no cargo hold (JC-6) — seed rows directly.
+async function seedHold(db: GameDb, rows: { kind: 'resource' | 'part'; name: string; qty: number }[]) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  for (const r of rows) {
+    await db.db.insert(schema.inventoryItems).values({ saveId: save.id, ...r })
+  }
+}
+
+describe('POST /api/ship/expand (5a(ii))', () => {
+  it('happy: row with type/payload, turn unchanged, cost deducted, no capacity change yet', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'REACTOR', level: 1, capacity: 2 }) // built, not maxed (base cap 10)
+    await seedHold(db, [{ kind: 'resource', name: 'resource', qty: expandCost(sys.capacity) }]) // exactly the existing cost logic
+    const [before] = await db.db.select().from(schema.saves)
+
+    const res = await post({ systemId: sys.id, leadCrewId: c1 })
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual(await getShipState(db)) // the same snapshot shape the instant action returned
+    const [row] = await db.db.select().from(schema.tasks)
+    expect(row).toMatchObject({ type: 'SHIP_EXPAND', leadCrewId: c1, status: 'ACTIVE', queuedAtTurn: before.turn })
+    expect(JSON.parse(row.helpers)).toEqual([]) // helpers is a JSON text column
+    expect(JSON.parse(row.payload)).toEqual({ systemId: sys.id })
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn) // no turn increment
+    expect(await db.db.select().from(schema.inventoryItems)).toHaveLength(0) // whole cost deducted at queue time
+    expect((await db.db.select().from(schema.shipSystems)).find((s) => s.id === sys.id)!.capacity).toBe(sys.capacity) // the effect waits for the tick
+  })
+
+  it('unaffordable → 422 (existing spendItems message), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'REACTOR', level: 1, capacity: 2 })
+    await seedHold(db, [{ kind: 'resource', name: 'resource', qty: expandCost(sys.capacity) - 1 }])
+    const res = await post({ systemId: sys.id, leadCrewId: c1 })
+    expect(res.status).toBe(422)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+
+  it('max capacity → 409 (existing pre-check, existing code), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'REACTOR', level: 1, capacity: 99 }) // above any max
+    expect((await post({ systemId: sys.id, leadCrewId: c1 })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+})

app/api/ship/expand/route.ts

@@ -0,0 +1,43 @@
+import { getGameDb } from '@/lib/db/client'
+import { parseCrewTeam } from '@/app/api/crew-team'
+import { checkExpandPreconditions, getShipState, ShipError } from '@/lib/game/ship'
+import { queueStateFromSave, saveInventory, saveTaskRow } from '@/lib/game/save'
+import { queueTask, TaskError } from '@/lib/game/tasks'
+
+// Raise a built ship system's capacity by one (capped at max capacity): assign the crew team
+// (lead + helpers) and queue the SHIP_EXPAND task — the cost (`capacity` units of any
+// resource) is deducted at queue time and the capacity bump lands when the task completes on
+// the turn tick (runTurn). Body: { systemId, leadCrewId, helperCrewIds? }. Queueing spends no
+// turn; returns the same fresh ship state the instant action returned.
+export async function POST(req: Request) {
+  let body: unknown
+  try {
+    body = await req.json()
+  } catch {
+    return Response.json({ error: 'Invalid JSON body' }, { status: 400 })
+  }
+
+  const systemId = (body as { systemId?: unknown }).systemId
+  if (typeof systemId !== 'number' || !Number.isInteger(systemId)) {
+    return Response.json({ error: 'systemId must be an integer' }, { status: 400 })
+  }
+  const team = parseCrewTeam(body)
+  if ('error' in team) {
+    return Response.json({ error: team.error }, { status: team.status })
+  }
+
+  try {
+    const db = await getGameDb()
+    await checkExpandPreconditions(db, systemId) // existing pre-checks: 404 unknown · 409 not built / max capacity
+    const state = await queueStateFromSave(db)
+    const { task, inventory } = queueTask(state, { type: 'SHIP_EXPAND', payload: { systemId }, leadCrewId: team.leadCrewId, helperCrewIds: team.helperCrewIds })
+    await saveTaskRow(db, task)
+    await saveInventory(db, inventory) // the cost was deducted at queue time
+    return Response.json(await getShipState(db))
+  } catch (err) {
+    if (err instanceof ShipError || err instanceof TaskError) {
+      return Response.json({ error: err.message }, { status: err.status })
+    }
+    throw err
+  }
+}

app/api/ship/route.ts

@@ -0,0 +1,8 @@
+import { getGameDb } from '@/lib/db/client'
+import { getShipState } from '@/lib/game/ship'
+
+// The ship's systems + cargo hold + turn; auto-initializes on first hit.
+export async function GET() {
+  const db = await getGameDb()
+  return Response.json(await getShipState(db))
+}

app/api/ship/upgrade/route.test.ts

@@ -0,0 +1,94 @@
+// Handler-level tests for the queueing ship-upgrade route (Task 5a(ii)): POST /api/ship/upgrade
+// with a crew team queues a SHIP_UPGRADE row instead of resolving instantly — the level-up
+// waits for the turn tick, the cost comes out of the cargo hold at queue time, same snapshot
+// shape, same pre-check codes, no turn spent at queue time.
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getShipState } from '@/lib/game/ship'
+import { upgradeCost } from '@/lib/game/ship-costs'
+import { addCrew, buildWorldFixture } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-ship-upgrade-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+const post = (body: unknown) => POST(new Request('http://localhost/api/ship/upgrade', { method: 'POST', body: JSON.stringify(body) }))
+
+// The fixture suite mints no ship rows (JC-6) — insert exactly what the test needs.
+async function insertSystem(db: GameDb, over: { type: string; level: number; capacity: number }) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db.insert(schema.shipSystems).values({ saveId: save.id, ...over }).returning()
+  return row
+}
+
+// The fixture suite mints no cargo hold (JC-6) — seed rows directly.
+async function seedHold(db: GameDb, rows: { kind: 'resource' | 'part'; name: string; qty: number }[]) {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  for (const r of rows) {
+    await db.db.insert(schema.inventoryItems).values({ saveId: save.id, ...r })
+  }
+}
+
+describe('POST /api/ship/upgrade (5a(ii))', () => {
+  it('happy: row with type/payload, turn unchanged, cost deducted, no level change yet', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'REACTOR', level: 2, capacity: 2 }) // built, not maxed (base cap 5)
+    await seedHold(db, [{ kind: 'resource', name: 'resource', qty: upgradeCost(sys.level) }]) // exactly the existing cost logic
+    const [before] = await db.db.select().from(schema.saves)
+
+    const res = await post({ systemId: sys.id, leadCrewId: c1 })
+    expect(res.status).toBe(200)
+    expect(await res.json()).toEqual(await getShipState(db)) // the same snapshot shape the instant action returned
+    const [row] = await db.db.select().from(schema.tasks)
+    expect(row).toMatchObject({ type: 'SHIP_UPGRADE', leadCrewId: c1, status: 'ACTIVE', queuedAtTurn: before.turn })
+    expect(JSON.parse(row.helpers)).toEqual([]) // helpers is a JSON text column
+    expect(JSON.parse(row.payload)).toEqual({ systemId: sys.id })
+    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn) // no turn increment
+    expect(await db.db.select().from(schema.inventoryItems)).toHaveLength(0) // whole cost deducted at queue time
+    expect((await db.db.select().from(schema.shipSystems)).find((s) => s.id === sys.id)!.level).toBe(sys.level) // the effect waits for the tick
+  })
+
+  it('unaffordable → 422 (existing spendItems message), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'REACTOR', level: 2, capacity: 2 })
+    await seedHold(db, [{ kind: 'resource', name: 'resource', qty: upgradeCost(sys.level) - 1 }])
+    const res = await post({ systemId: sys.id, leadCrewId: c1 })
+    expect(res.status).toBe(422)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+
+  it('max level → 409 (existing pre-check, existing code), nothing queued', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const sys = await insertSystem(db, { type: 'REACTOR', level: 99, capacity: 2 }) // above any max
+    expect((await post({ systemId: sys.id, leadCrewId: c1 })).status).toBe(409)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0)
+  })
+})

app/api/ship/upgrade/route.ts

@@ -0,0 +1,43 @@
+import { getGameDb } from '@/lib/db/client'
+import { parseCrewTeam } from '@/app/api/crew-team'
+import { checkUpgradePreconditions, getShipState, ShipError } from '@/lib/game/ship'
+import { queueStateFromSave, saveInventory, saveTaskRow } from '@/lib/game/save'
+import { queueTask, TaskError } from '@/lib/game/tasks'
+
+// Level up a built ship system by one (capped at max level): assign the crew team (lead +
+// helpers) and queue the SHIP_UPGRADE task — the cost (`level` units of any resource) is
+// deducted at queue time and the level-up lands when the task completes on the turn tick
+// (runTurn). Body: { systemId, leadCrewId, helperCrewIds? }. Queueing spends no turn;
+// returns the same fresh ship state the instant action returned.
+export async function POST(req: Request) {
+  let body: unknown
+  try {
+    body = await req.json()
+  } catch {
+    return Response.json({ error: 'Invalid JSON body' }, { status: 400 })
+  }
+
+  const systemId = (body as { systemId?: unknown }).systemId
+  if (typeof systemId !== 'number' || !Number.isInteger(systemId)) {
+    return Response.json({ error: 'systemId must be an integer' }, { status: 400 })
+  }
+  const team = parseCrewTeam(body)
+  if ('error' in team) {
+    return Response.json({ error: team.error }, { status: team.status })
+  }
+
+  try {
+    const db = await getGameDb()
+    await checkUpgradePreconditions(db, systemId) // existing pre-checks: 404 unknown · 409 not built / max level
+    const state = await queueStateFromSave(db)
+    const { task, inventory } = queueTask(state, { type: 'SHIP_UPGRADE', payload: { systemId }, leadCrewId: team.leadCrewId, helperCrewIds: team.helperCrewIds })
+    await saveTaskRow(db, task)
+    await saveInventory(db, inventory) // the cost was deducted at queue time
+    return Response.json(await getShipState(db))
+  } catch (err) {
+    if (err instanceof ShipError || err instanceof TaskError) {
+      return Response.json({ error: err.message }, { status: err.status })
+    }
+    throw err
+  }
+}

app/api/tech/route.ts

@@ -0,0 +1,8 @@
+import { getGameDb } from '@/lib/db/client'
+import { getTechState } from '@/lib/game/research'
+
+// The full tech tree with per-save state (RESEARCHED / AVAILABLE / LOCKED + missing prereqs). Auto-initializes on first hit.
+export async function GET() {
+  const db = await getGameDb()
+  return Response.json(await getTechState(db))
+}

app/api/turn/route.test.ts

@@ -0,0 +1,70 @@
+// Handler-level tests for the manual tick route (Task 5b): POST /api/turn (no body) advances
+// exactly one turn — an empty queue is a FREE SKIP (200, turn +1, nothing else changes, the
+// route never rejects), and a mid-countdown ACTIVE task decrements by exactly one in both the
+// returned snapshot and the persisted row (no resolution, no mission hook — it never hits 0).
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { getGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { addCrew, buildWorldFixture, insertTaskRow } from '@/lib/game/test-fixtures'
+import { POST } from './route'
+
+const dirs: string[] = []
+// The route talks to the app-process singleton (getGameDb), so each test points it at a
+// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
+// sql.js copies of one file would never see each other's writes.
+const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-turn-route-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  process.env.SPACE_WANDERER_DB_PATH = file
+  delete g.__spaceWandererGameDb
+  return { db: await getGameDb(), file }
+}
+
+afterAll(async () => {
+  delete process.env.SPACE_WANDERER_DB_PATH
+  delete g.__spaceWandererGameDb
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+// No request body — the handler never reads one.
+const post = () => POST()
+
+describe('POST /api/turn', () => {
+  it('empty queue → free skip: 200, turn +1, nothing else changes', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const [before] = await db.db.select().from(schema.saves)
+
+    const res = await post()
+    expect(res.status).toBe(200)
+    const snap = await res.json()
+    expect(snap.turn).toBe(before.turn + 1)
+    expect(await db.db.select().from(schema.tasks)).toHaveLength(0) // the tick creates nothing
+    expect(snap.tasks).toEqual([]) // the composed queue array is empty
+  })
+
+  it('one ACTIVE task → 200, remaining decrements by exactly 1 in the returned snapshot', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const [before] = await db.db.select().from(schema.saves)
+    // Fixture task: one ACTIVE row, mid-countdown — a direct insert on the queue table
+    // (the 4b save.test pattern: it works with the queue rows directly); it never reaches 0
+    // this tick, so no resolver and no mission hook runs
+    await insertTaskRow(db, { type: 'JUMP', payload: { systemId: f.sys1, hops: 1 }, leadCrewId: c1, helpers: [], duration: 5, remaining: 3, status: 'ACTIVE', queuedAtTurn: before.turn })
+
+    const res = await post()
+    expect(res.status).toBe(200)
+    const snap = await res.json()
+    expect(snap.turn).toBe(before.turn + 1)
+    expect(snap.tasks).toHaveLength(1)
+    expect(snap.tasks[0].remaining).toBe(2) // 3 − 1: exactly one decrement
+    expect((await db.db.select().from(schema.tasks))[0].remaining).toBe(2) // the persisted row matches the snapshot
+  })
+})

app/api/turn/route.ts

@@ -0,0 +1,21 @@
+import { getGameDb } from '@/lib/db/client'
+import { getWorldState, runTurn } from '@/lib/game/save'
+
+// The manual tick (spec §3): advance exactly one turn — every ACTIVE task ages by one, tasks
+// that reach 0 resolve (the 4a resolvers + their mission hooks, 4b), and PENDING successors
+// auto-start in FIFO order. An empty queue is a FREE SKIP: turn +1 with nothing else changed —
+// the route never rejects a tick, so the UI's NEXT TURN button is never disabled. No request
+// body. Returns the same world snapshot GET /api/world returns, composed with the tick's
+// task array (the snapshot readers do not select the tasks table, so it comes from the TickResult).
+export async function POST() {
+  try {
+    const db = await getGameDb()
+    const tick = await runTurn(db)
+    return Response.json({ ...(await getWorldState(db)), tasks: tick.tasks })
+  } catch (err) {
+    // No domain errors escape runTurn (4b fails the task instead) — anything reaching here is
+    // a non-domain rethrow, i.e. a real bug: the error-mapping pattern, 500 when no status.
+    const e = err as { status?: number; message: string }
+    return Response.json({ error: e.message }, { status: e.status ?? 500 })
+  }
+}

app/globals.css

@@ -160,6 +160,12 @@ body {
   -moz-osx-font-smoothing: grayscale;
 }
 
+/* Radix Tabs hides inactive content via the `hidden` attribute, but inline display styles (the
+   #36 pane-fill flex chain on the WORLD MAP tab) outrank the UA stylesheet — restore semantics. */
+[hidden] {
+  display: none !important;
+}
+
 #root {
   min-height: 100vh;
 }

bun.lock

@@ -10,6 +10,9 @@
         "@radix-ui/react-tabs": "^1.1.13",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
+        "d3-force": "^3.0.0",
+        "d3-selection": "^3.0.0",
+        "d3-zoom": "^3.0.0",
         "drizzle-orm": "^0.45.2",
         "next": "^16.3.5",
         "react": "^19.3.0",
@@ -20,6 +23,9 @@
       "devDependencies": {
         "@playwright/test": "1.63.0",
         "@tailwindcss/postcss": "^4.2.0",
+        "@types/d3-force": "^3.0.10",
+        "@types/d3-selection": "^3.0.12",
+        "@types/d3-zoom": "^3.0.9",
         "@types/node": "^22.20.3",
         "@types/react": "^19.3.0",
         "@types/react-dom": "^19.3.0",
@@ -221,6 +227,16 @@
 
     "@types/chai": ["@types/chai@5.2.3", "", { "dependencies": { "@types/deep-eql": "*", "assertion-error": "^2.0.1" } }, "sha512-Mw558oeA9fFbv65/y4mHtXDs9bPnFMZAL/jxdPFUpOHHIXX91mcgEHbS5Lahr+pwZFR8A7GQleRWeI6cGFC2UA=="],
 
+    "@types/d3-color": ["@types/d3-color@3.1.3", "", {}, "sha512-iO90scth9WAbmgv7ogoq57O9YpKmFBbmoEoCHDB2xMBY0+/KVrqAaCDyCE16dUspeOvIxFFRI+0sEtqDqy2b4A=="],
+
+    "@types/d3-force": ["@types/d3-force@3.0.10", "", {}, "sha512-ZYeSaCF3p73RdOKcjj+swRlZfnYpK1EbaDiYICEEp5Q6sUiqFaFQ9qgoshp5CzIyyb/yD09kD9o2zEltCexlgw=="],
+
+    "@types/d3-interpolate": ["@types/d3-interpolate@3.0.4", "", { "dependencies": { "@types/d3-color": "*" } }, "sha512-mgLPETlrpVV1YRJIglr4Ez47g7Yxjl1lj7YKsiMCb27VJH9W8NVM6Bb9d8kkpG/uAQS5AmbA48q2IAolKKo1MA=="],
+
+    "@types/d3-selection": ["@types/d3-selection@3.0.12", "", {}, "sha512-Qe/KWYhEiIIxGs7HrAAjMfShxKldx19SJtr5zu53f3afPsdZNz7HHtdTLXo/kqeiWNXVycI24kSnfzBYkTzpgw=="],
+
+    "@types/d3-zoom": ["@types/d3-zoom@3.0.9", "", { "dependencies": { "@types/d3-interpolate": "*", "@types/d3-selection": "*" } }, "sha512-0sE1406XBYJGiqD3AusTl9ZqC//2mIXix51tbom25gDCA8ri4xnSZg28CaSE8Srl6FClqABUKfsn0qghgdepMA=="],
+
     "@types/deep-eql": ["@types/deep-eql@4.0.2", "", {}, "sha512-c9h9dVVMigMPc4bwTvC5dxqtqJZwQPePsWjPlpSOnojbor6pGqdk541lfA7AqFQr5pB1BRdq0juY9db81BwyFw=="],
 
     "@types/emscripten": ["@types/emscripten@1.41.6", "", {}, "sha512-uN+9i8bFT5CUcZfyIEYDrSueACEyKGbUs5kC/72DGlZZoinh84sJfVV0i8UOJD1asdzkvLPBRrKs41kZ8MdEXg=="],
@@ -295,6 +311,28 @@
 
     "csstype": ["csstype@3.2.3", "", {}, "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ=="],
 
+    "d3-color": ["d3-color@3.1.0", "", {}, "sha512-zg/chbXyeBtMQ1LbD/WSoW2DpC3I0mpmPdW+ynRTj/x2DAWYrIY7qeZIHidozwV24m4iavr15lNwIwLxRmOxhA=="],
+
+    "d3-dispatch": ["d3-dispatch@3.0.1", "", {}, "sha512-rzUyPU/S7rwUflMyLc1ETDeBj0NRuHKKAcvukozwhshr6g6c5d8zh4c2gQjY2bZ0dXeGLWc1PF174P2tVvKhfg=="],
+
+    "d3-drag": ["d3-drag@3.0.0", "", { "dependencies": { "d3-dispatch": "1 - 3", "d3-selection": "3" } }, "sha512-pWbUJLdETVA8lQNJecMxoXfH6x+mO2UQo8rSmZ+QqxcbyA3hfeprFgIT//HW2nlHChWeIIMwS2Fq+gEARkhTkg=="],
+
+    "d3-ease": ["d3-ease@3.0.1", "", {}, "sha512-wR/XK3D3XcLIZwpbvQwQ5fK+8Ykds1ip7A2Txe0yxncXSdq1L9skcG7blcedkOX+ZcgxGAmLX1FrRGbADwzi0w=="],
+
+    "d3-force": ["d3-force@3.0.0", "", { "dependencies": { "d3-dispatch": "1 - 3", "d3-quadtree": "1 - 3", "d3-timer": "1 - 3" } }, "sha512-zxV/SsA+U4yte8051P4ECydjD/S+qeYtnaIyAs9tgHCqfguma/aAQDjo85A9Z6EKhBirHRJHXIgJUlffT4wdLg=="],
+
+    "d3-interpolate": ["d3-interpolate@3.0.1", "", { "dependencies": { "d3-color": "1 - 3" } }, "sha512-3bYs1rOD33uo8aqJfKP3JWPAibgw8Zm2+L9vBKEHJ2Rg+viTR7o5Mmv5mZcieN+FRYaAOWX5SJATX6k1PWz72g=="],
+
+    "d3-quadtree": ["d3-quadtree@3.0.1", "", {}, "sha512-04xDrxQTDTCFwP5H6hRhsRcb9xxv2RzkcsygFzmkSIOJy3PeRJP7sNk3VRIbKXcog561P9oU0/rVH6vDROAgUw=="],
+
+    "d3-selection": ["d3-selection@3.0.0", "", {}, "sha512-fmTRWbNMmsmWq6xJV8D19U/gw/bwrHfNXxrIN+HfZgnzqTHp9jOmKMhsTUjXOJnZOdZY9Q28y4yebKzqDKlxlQ=="],
+
+    "d3-timer": ["d3-timer@3.0.1", "", {}, "sha512-ndfJ/JxxMd3nw31uyKoY2naivF+r29V+Lc0svZxe1JvvIRmi8hUsrMvdOwgS1o6uBHmiz91geQ0ylPP0aj1VUA=="],
+
+    "d3-transition": ["d3-transition@3.0.1", "", { "dependencies": { "d3-color": "1 - 3", "d3-dispatch": "1 - 3", "d3-ease": "1 - 3", "d3-interpolate": "1 - 3", "d3-timer": "1 - 3" }, "peerDependencies": { "d3-selection": "2 - 3" } }, "sha512-ApKvfjsSR6tg06xrL434C0WydLr7JewBB3V+/39RMHsaXTOG0zmt/OAXeng5M5LBm0ojmxJrpomQVZ1aPvBL4w=="],
+
+    "d3-zoom": ["d3-zoom@3.0.0", "", { "dependencies": { "d3-dispatch": "1 - 3", "d3-drag": "2 - 3", "d3-interpolate": "1 - 3", "d3-selection": "2 - 3", "d3-transition": "2 - 3" } }, "sha512-b8AmV3kfQaqWAuacbPuNbL6vahnOJflOhexLzMMNLga62+/nh0JzvJ0aO/5a5MVgUFGS7Hu1P9P03o3fJkDCyw=="],
+
     "detect-libc": ["detect-libc@2.1.2", "", {}, "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ=="],
 
     "drizzle-orm": ["drizzle-orm@0.45.3", "", { "peerDependencies": { "@aws-sdk/client-rds-data": ">=3", "@cloudflare/workers-types": ">=4", "@electric-sql/pglite": ">=0.2.0", "@libsql/client": ">=0.10.0", "@libsql/client-wasm": ">=0.10.0", "@neondatabase/serverless": ">=0.10.0", "@netlify/db": ">=0.4.0", "@op-engineering/op-sqlite": ">=2", "@opentelemetry/api": "^1.4.1", "@planetscale/database": ">=1.13", "@prisma/client": "*", "@tidbcloud/serverless": "*", "@types/better-sqlite3": "*", "@types/pg": "*", "@types/sql.js": "*", "@upstash/redis": ">=1.34.7", "@vercel/postgres": ">=0.8.0", "@xata.io/client": "*", "better-sqlite3": ">=7", "bun-types": "*", "expo-sqlite": ">=14.0.0", "gel": ">=2", "knex": "*", "kysely": "*", "mysql2": ">=2", "pg": ">=8", "postgres": ">=3", "prisma": "*", "sql.js": ">=1", "sqlite3": ">=5" }, "optionalPeers": ["@aws-sdk/client-rds-data", "@cloudflare/workers-types", "@electric-sql/pglite", "@libsql/client", "@libsql/client-wasm", "@neondatabase/serverless", "@netlify/db", "@op-engineering/op-sqlite", "@opentelemetry/api", "@planetscale/database", "@prisma/client", "@tidbcloud/serverless", "@types/better-sqlite3", "@types/pg", "@types/sql.js", "@upstash/redis", "@vercel/postgres", "@xata.io/client", "better-sqlite3", "bun-types", "expo-sqlite", "gel", "knex", "kysely", "mysql2", "pg", "postgres", "prisma", "sql.js", "sqlite3"] }, "sha512-CAloER21cDdcgZ1OmjrZX82EeRNsdP+y0onX/eyoYDaYzki/adrAa91lzM5jWh7zZPK4qUbw/6LGv9J+A+uizA=="],

components/admin-panel.tsx

@@ -0,0 +1,322 @@
+'use client'
+
+import { useCallback, useEffect, useState } from 'react'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import { Panel, PanelContent, PanelHeader, PanelTitle } from '@/components/ui/panel'
+
+// #38 — direct DB CRUD for the admin. ponytail: deliberately unauthenticated (explicit request);
+// add auth before this is reachable beyond the dev host.
+interface AdminColumnInfo { name: string; type: string; pk: number }
+interface AdminTableInfo { name: string; columns: AdminColumnInfo[]; count: number }
+interface AdminRows { rows: Record<string, unknown>[]; total: number }
+
+// Form state is all strings (one input per column); parsed on save against the column type.
+function parseValue(raw: string, col: AdminColumnInfo): number | string | null {
+  const v = raw.trim()
+  if (v === '' || v.toLowerCase() === 'null') return null
+  if (/INT|REAL|FLOA|DOUB/.test(col.type)) {
+    const n = Number(v)
+    if (!Number.isFinite(n)) throw new Error(`'${col.name}' must be a number, got '${v}'`)
+    return col.type.includes('INT') ? Math.trunc(n) : n
+  }
+  return v
+}
+
+function cellText(value: unknown): string {
+  return value === null || value === undefined ? '—' : String(value)
+}
+
+export function AdminPanel({ onClose }: { onClose: () => void }) {
+  const [tables, setTables] = useState<AdminTableInfo[] | null>(null)
+  const [selected, setSelected] = useState<string | null>(null)
+  const [rows, setRows] = useState<AdminRows | null>(null)
+  // null = form closed; { key: null } = add row; { key: {...} } = edit that row.
+  const [editing, setEditing] = useState<{ key: Record<string, number> | null } | null>(null)
+  const [form, setForm] = useState<Record<string, string>>({})
+  const [error, setError] = useState<string | null>(null)
+
+  const table = tables?.find((t) => t.name === selected) ?? null
+
+  const refreshTables = useCallback(async () => {
+    try {
+      const res = await fetch('/api/admin/tables')
+      if (!res.ok) throw new Error(`HTTP ${res.status}`)
+      setTables((await res.json()) as AdminTableInfo[])
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err))
+    }
+  }, [])
+
+  const refreshRows = useCallback(async (name: string) => {
+    try {
+      const res = await fetch(`/api/admin/tables/${encodeURIComponent(name)}/rows`)
+      if (!res.ok) throw new Error(`HTTP ${res.status}`)
+      setRows((await res.json()) as AdminRows)
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err))
+    }
+  }, [])
+
+  useEffect(() => {
+    void refreshTables()
+  }, [refreshTables])
+
+  useEffect(() => {
+    if (!selected) return
+    setRows(null)
+    void refreshRows(selected)
+  }, [selected, refreshRows])
+
+  const pkColumns = (t: AdminTableInfo): AdminColumnInfo[] => t.columns.filter((c) => c.pk > 0).sort((a, b) => a.pk - b.pk)
+
+  const rowKey = (t: AdminTableInfo, row: Record<string, unknown>): Record<string, number> =>
+    Object.fromEntries(pkColumns(t).map((c) => [c.name, Number(row[c.name])]))
+
+  const openAdd = () => {
+    if (!table) return
+    setEditing({ key: null })
+    setForm(Object.fromEntries(table.columns.map((c) => [c.name, ''])))
+    setError(null)
+  }
+
+  const openEdit = (row: Record<string, unknown>) => {
+    if (!table) return
+    setEditing({ key: rowKey(table, row) })
+    setForm(Object.fromEntries(table.columns.map((c) => [c.name, row[c.name] == null ? '' : String(row[c.name])])))
+    setError(null)
+  }
+
+  const save = async () => {
+    if (!table || !editing) return
+    try {
+      const payload: Record<string, number | string | null> = {}
+      for (const col of table.columns) payload[col.name] = parseValue(form[col.name] ?? '', col)
+      const url = `/api/admin/tables/${encodeURIComponent(table.name)}/rows`
+      const res = await fetch(url, {
+        method: editing.key === null ? 'POST' : 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(editing.key === null ? payload : { key: editing.key, values: payload }),
+      })
+      const body = (await res.json()) as { error?: string } & Record<string, unknown>
+      if (!res.ok) throw new Error(body.error ?? `HTTP ${res.status}`)
+      setEditing(null)
+      setError(null)
+      await Promise.all([refreshRows(table.name), refreshTables()])
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err))
+    }
+  }
+
+  const remove = async (row: Record<string, unknown>) => {
+    if (!table) return
+    try {
+      const res = await fetch(`/api/admin/tables/${encodeURIComponent(table.name)}/rows`, {
+        method: 'DELETE',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ key: rowKey(table, row) }),
+      })
+      const body = (await res.json()) as { error?: string }
+      if (!res.ok) throw new Error(body.error ?? `HTTP ${res.status}`)
+      await Promise.all([refreshRows(table.name), refreshTables()])
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err))
+    }
+  }
+
+  const inputStyle: React.CSSProperties = {
+    width: '100%',
+    background: 'var(--background)',
+    border: '1px solid var(--border)',
+    color: 'var(--text-secondary)',
+    fontFamily: 'inherit',
+    fontSize: '0.68rem',
+    padding: '0.3rem 0.4rem',
+    outline: 'none',
+  }
+
+  return (
+    <div
+      style={{
+        position: 'fixed',
+        inset: 0,
+        zIndex: 100,
+        background: 'rgba(0, 0, 0, 0.75)',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        padding: '1rem',
+      }}
+    >
+      <Panel notch="md" style={{ width: 'min(980px, 100%)', height: 'min(640px, 100%)', display: 'flex', flexDirection: 'column' }}>
+        <PanelHeader>
+          <PanelTitle>ADMIN // DB CRUD</PanelTitle>
+          <Badge variant="WARNING">NO AUTH</Badge>
+          <div style={{ marginLeft: 'auto' }}>
+            <Button size="SM" onClick={onClose}>CLOSE</Button>
+          </div>
+        </PanelHeader>
+
+        <div style={{ flex: 1, display: 'grid', gridTemplateColumns: '200px 1fr', gap: '1px', background: 'var(--border)', minHeight: 0 }}>
+          {/* ── TABLE LIST ── */}
+          <div style={{ background: 'var(--surface)', overflowY: 'auto', padding: '0.5rem' }}>
+            {!tables ? (
+              <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING…</span>
+            ) : (
+              tables.map((t) => (
+                <button
+                  key={t.name}
+                  onClick={() => setSelected(t.name)}
+                  style={{
+                    display: 'flex',
+                    justifyContent: 'space-between',
+                    alignItems: 'center',
+                    width: '100%',
+                    gap: '0.5rem',
+                    padding: '0.4rem 0.5rem',
+                    marginBottom: '2px',
+                    background: selected === t.name ? 'var(--surface-raised)' : 'transparent',
+                    border: `1px solid ${selected === t.name ? 'var(--color-green)' : 'var(--border)'}`,
+                    color: selected === t.name ? 'var(--color-green)' : 'var(--text-secondary)',
+                    fontFamily: 'inherit',
+                    fontSize: '0.68rem',
+                    letterSpacing: '0.06em',
+                    cursor: 'pointer',
+                  }}
+                >
+                  <span>{t.name}</span>
+                  <span style={{ color: 'var(--text-muted)' }}>{t.count}</span>
+                </button>
+              ))
+            )}
+          </div>
+
+          {/* ── ROWS / EDITOR ── */}
+          <div style={{ background: 'var(--surface)', display: 'flex', flexDirection: 'column', minHeight: 0 }}>
+            {!table ? (
+              <PanelContent>
+                <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>SELECT A TABLE</span>
+              </PanelContent>
+            ) : (
+              <>
+                <div
+                  style={{
+                    display: 'flex',
+                    alignItems: 'center',
+                    gap: '0.5rem',
+                    padding: '0.4rem 0.75rem',
+                    borderBottom: '1px solid var(--border)',
+                  }}
+                >
+                  <span style={{ fontSize: '0.68rem', color: 'var(--color-green)', letterSpacing: '0.1em' }}>{table.name}</span>
+                  {rows && (
+                    <Badge variant="ACTIVE">
+                      {rows.rows.length} / {rows.total}
+                    </Badge>
+                  )}
+                  <div style={{ marginLeft: 'auto', display: 'flex', gap: '0.4rem' }}>
+                    {!editing && <Button size="SM" variant="EXEC" onClick={openAdd}>ADD ROW</Button>}
+                    {error && (
+                      <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', alignSelf: 'center' }}>{error}</span>
+                    )}
+                  </div>
+                </div>
+
+                {editing && (
+                  <div style={{ padding: '0.5rem 0.75rem', borderBottom: '1px solid var(--border)' }}>
+                    <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fill, minmax(160px, 1fr))', gap: '0.4rem' }}>
+                      {table.columns.map((c) => (
+                        <label key={c.name} style={{ display: 'flex', flexDirection: 'column', gap: '0.2rem' }}>
+                          <span style={{ fontSize: '0.58rem', color: 'var(--text-muted)', letterSpacing: '0.1em' }}>
+                            {c.name.toUpperCase()}
+                            {c.pk > 0 ? ` (PK${c.pk})` : ''} · {c.type}
+                          </span>
+                          <input
+                            style={inputStyle}
+                            value={form[c.name] ?? ''}
+                            onChange={(e) => setForm((f) => ({ ...f, [c.name]: e.target.value }))}
+                          />
+                        </label>
+                      ))}
+                    </div>
+                    <div style={{ display: 'flex', gap: '0.4rem', marginTop: '0.5rem' }}>
+                      <Button size="SM" variant="EXEC" onClick={() => void save()}>SAVE</Button>
+                      <Button size="SM" onClick={() => setEditing(null)}>CANCEL</Button>
+                    </div>
+                  </div>
+                )}
+
+                <div style={{ flex: 1, overflowY: 'auto' }}>
+                  {!rows ? (
+                    <PanelContent>
+                      <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING…</span>
+                    </PanelContent>
+                  ) : rows.rows.length === 0 ? (
+                    <PanelContent>
+                      <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>EMPTY TABLE</span>
+                    </PanelContent>
+                  ) : (
+                    <table style={{ width: '100%', borderCollapse: 'collapse', fontSize: '0.65rem' }}>
+                      <thead>
+                        <tr>
+                          {table.columns.map((c) => (
+                            <th
+                              key={c.name}
+                              style={{
+                                position: 'sticky',
+                                top: 0,
+                                background: 'var(--surface-raised)',
+                                color: 'var(--text-muted)',
+                                textAlign: 'left',
+                                padding: '0.35rem 0.5rem',
+                                borderBottom: '1px solid var(--border)',
+                                letterSpacing: '0.08em',
+                                whiteSpace: 'nowrap',
+                              }}
+                            >
+                              {c.name}
+                              {c.pk > 0 ? ` (PK${c.pk})` : ''}
+                            </th>
+                          ))}
+                          <th style={{ position: 'sticky', top: 0, background: 'var(--surface-raised)', padding: '0.35rem 0.5rem', borderBottom: '1px solid var(--border)' }} />
+                        </tr>
+                      </thead>
+                      <tbody>
+                        {rows.rows.map((row) => (
+                          <tr key={JSON.stringify(rowKey(table, row))}>
+                            {table.columns.map((c) => (
+                              <td
+                                key={c.name}
+                                style={{
+                                  padding: '0.3rem 0.5rem',
+                                  borderBottom: '1px solid var(--border)',
+                                  color: row[c.name] === null ? 'var(--text-muted)' : 'var(--text-secondary)',
+                                  whiteSpace: 'nowrap',
+                                  overflow: 'hidden',
+                                  textOverflow: 'ellipsis',
+                                  maxWidth: '220px',
+                                }}
+                              >
+                                {cellText(row[c.name])}
+                              </td>
+                            ))}
+                            <td style={{ padding: '0.3rem 0.5rem', borderBottom: '1px solid var(--border)', whiteSpace: 'nowrap' }}>
+                              <span style={{ display: 'inline-flex', gap: '0.3rem' }}>
+                                <Button size="SM" onClick={() => openEdit(row)}>EDIT</Button>
+                                <Button size="SM" variant="ABORT" onClick={() => void remove(row)}>DEL</Button>
+                              </span>
+                            </td>
+                          </tr>
+                        ))}
+                      </tbody>
+                    </table>
+                  )}
+                </div>
+              </>
+            )}
+          </div>
+        </div>
+      </Panel>
+    </div>
+  )
+}

components/crew-panel.tsx

@@ -0,0 +1,101 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { Badge } from '@/components/ui/badge'
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
+import type { CrewDto, CrewState } from '@/lib/game/save'
+
+// CREW tab — the ship's roster: starting crew plus members found while exploring. Fetches
+// /api/crew on mount; Radix unmounts inactive tabs, so opening this tab always refetches
+// (no polling needed — turn-based game). Display-only for now: no dismiss/assign actions yet.
+
+interface CrewPanelProps {
+  narrow?: boolean
+}
+
+export function CrewPanel({ narrow }: CrewPanelProps) {
+  const [roster, setRoster] = useState<CrewDto[] | null>(null)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    let cancelled = false
+    fetch('/api/crew')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as CrewState // { crew, tasks } — the endpoint wraps the roster (JC-7)
+      })
+      .then((r) => {
+        if (!cancelled) setRoster(r.crew)
+      })
+      .catch((err: unknown) => {
+        if (!cancelled) setError(err instanceof Error ? err.message : String(err))
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  if (error && !roster) {
+    return (
+      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>
+          CREW MANIFEST OFFLINE // {error.toUpperCase()}
+        </span>
+      </div>
+    )
+  }
+
+  if (!roster) {
+    return (
+      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING CREW MANIFEST…</span>
+      </div>
+    )
+  }
+
+  return (
+    <div
+      style={{
+        display: 'grid',
+        gridTemplateColumns: narrow ? '1fr' : 'repeat(2, 1fr)',
+        gap: '0.75rem',
+      }}
+    >
+      {roster.map((member) => (
+        <Card key={member.id}>
+          <CardHeader>
+            <div style={{ display: 'flex', alignItems: 'center' }}>
+              <CardTitle>{member.name}</CardTitle>
+              <Badge variant="ACTIVE" className="ml-auto">
+                ACTIVE
+              </Badge>
+            </div>
+            <p
+              style={{
+                fontSize: '0.6rem',
+                color: 'var(--text-muted)',
+                letterSpacing: '0.1em',
+                textTransform: 'uppercase',
+              }}
+            >
+              {member.role}
+            </p>
+          </CardHeader>
+          <CardContent style={{ display: 'flex', flexDirection: 'column', gap: '0.4rem' }}>
+            <div style={{ fontSize: '0.7rem', letterSpacing: '0.05em' }}>
+              <span style={{ color: 'var(--color-green)' }}>+ </span>
+              <span style={{ color: 'var(--text-secondary)' }}>{member.traitGood}</span>
+            </div>
+            <div style={{ fontSize: '0.7rem', letterSpacing: '0.05em' }}>
+              <span style={{ color: 'var(--color-red)' }}>- </span>
+              <span style={{ color: 'var(--text-secondary)' }}>{member.traitBad}</span>
+            </div>
+            <p style={{ fontSize: '0.6rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>
+              ORIGIN // {member.origin.toUpperCase()}
+            </p>
+          </CardContent>
+        </Card>
+      ))}
+    </div>
+  )
+}

components/event-log.tsx

@@ -0,0 +1,59 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { Terminal, type TerminalLine } from '@/components/ui/terminal'
+import type { EventDto } from '@/lib/game/events'
+
+// EVENT LOG tab — live data. Fetches /api/events on mount (Radix Tabs unmounts inactive tabs, so it
+// refetches whenever the tab is opened). One terminal line per event: T<turn> // <MESSAGE>, newest first.
+
+export function EventLogPanel() {
+  const [lines, setLines] = useState<TerminalLine[] | null>(null)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    let cancelled = false
+    fetch('/api/events')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as EventDto[]
+      })
+      .then((events) => {
+        if (!cancelled) {
+          setLines(
+            events.map((e) => ({
+              type: e.type === 'new_game' ? 'system' : 'output',
+              text: `T${e.turn} // ${e.message.toUpperCase()}`,
+              timestamp: new Date(e.createdAt).toLocaleTimeString('en-GB', { hour12: false }),
+            }))
+          )
+        }
+      })
+      .catch((err: unknown) => {
+        if (!cancelled) setError(err instanceof Error ? err.message : String(err))
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  if (error) {
+    return (
+      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>{error.toUpperCase()}</span>
+      </div>
+    )
+  }
+
+  if (!lines) {
+    return (
+      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING EVENT LOG…</span>
+      </div>
+    )
+  }
+
+  return (
+    <Terminal lines={lines} title="SHIP LOG" height="22rem" style={{ width: '100%' }} />
+  )
+}

components/local-system.tsx

@@ -3,67 +3,74 @@
 import { useCallback, useEffect, useState } from 'react'
 import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
-import type { ExploreResult, SystemState } from '@/lib/game/save'
+import { TeamBuilder } from '@/components/team-builder'
+import type { CrewState, ExploreResult, SystemState } from '@/lib/game/save'
 import type { FoundItem } from '@/lib/game/world'
 
 // LOCAL SYSTEM tab — the bodies of the current system (planets + staggered moons) with an
-// EXPLORE button per unexplored row. Fetches /api/system on mount; explore responses are
-// applied directly (no polling). Turn-based: one scan costs a turn, each body once.
+// EXPLORE button per unexplored row. A button click ARMS the planet (#44): the crew team
+// builder mounts at the top of the column and its DISPATCH POSTs /api/explore with the team.
+// The parent (MissionControl) owns the /api/system state so the right column's CARGO HOLD
+// mirrors scans immediately; this panel reports each scan's response up via onChanged and
+// keeps only its own UI bits locally (no polling). Turn-based: one scan costs a turn, each
+// body once.
 
-export function LocalSystemPanel() {
-  const [state, setState] = useState<SystemState | null>(null)
+interface LocalSystemPanelProps {
+  system: SystemState | null
+  onChanged: (next: SystemState) => void
+}
+
+export function LocalSystemPanel({ system, onChanged }: LocalSystemPanelProps) {
   const [lastOutcome, setLastOutcome] = useState<FoundItem[] | null>(null)
   const [error, setError] = useState<string | null>(null)
   const [exploringId, setExploringId] = useState<number | null>(null)
+  // #44 — the armed planet (the last-clicked unexplored row); the builder above the list picks
+  // the team and its DISPATCH performs the scan.
+  const [armedPlanetId, setArmedPlanetId] = useState<number | null>(null)
+  const [crew, setCrew] = useState<CrewState | null>(null)
 
-  useEffect(() => {
-    let cancelled = false
-    fetch('/api/system')
+  // JC-14 — the roster + queue the builder mirrors: fetched on mount and after every
+  // successful dispatch (the scan response updates the system state, not the roster).
+  // Keep-old-on-failure, the house .catch(() => {}) pattern.
+  const fetchCrew = useCallback(() => {
+    fetch('/api/crew')
       .then(async (res) => {
         if (!res.ok) throw new Error(`HTTP ${res.status}`)
-        return (await res.json()) as SystemState
+        return (await res.json()) as CrewState
       })
-      .then((s) => {
-        if (!cancelled) setState(s)
-      })
-      .catch((err: unknown) => {
-        if (!cancelled) setError(err instanceof Error ? err.message : String(err))
-      })
-    return () => {
-      cancelled = true
-    }
+      .then((c) => setCrew(c))
+      .catch(() => {})
   }, [])
 
-  const explore = useCallback(async (planetId: number) => {
-    setExploringId(planetId)
-    try {
-      const res = await fetch('/api/explore', {
-        method: 'POST',
-        headers: { 'content-type': 'application/json' },
-        body: JSON.stringify({ planetId }),
-      })
-      const body = (await res.json()) as ExploreResult & { error?: string }
-      if (!res.ok) throw new Error(body.error ?? `HTTP ${res.status}`)
-      setState(body) // fresh state straight from the response — no refetch needed
-      setLastOutcome(body.outcome)
-    } catch (err: unknown) {
-      setError(err instanceof Error ? err.message : String(err))
-    } finally {
-      setExploringId(null)
-    }
-  }, [])
+  useEffect(() => {
+    fetchCrew()
+  }, [fetchCrew])
 
-  if (error && !state) {
-    return (
-      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
-        <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>
-          SYSTEM SCAN OFFLINE // {error.toUpperCase()}
-        </span>
-      </div>
-    )
-  }
+  const explore = useCallback(
+    async (planetId: number, leadCrewId: number, helperCrewIds: number[]) => {
+      setExploringId(planetId)
+      setArmedPlanetId(null)
+      try {
+        const res = await fetch('/api/explore', {
+          method: 'POST',
+          headers: { 'content-type': 'application/json' },
+          body: JSON.stringify({ planetId, leadCrewId, helperCrewIds }),
+        })
+        const body = (await res.json()) as ExploreResult & { error?: string }
+        if (!res.ok) throw new Error(body.error ?? `HTTP ${res.status}`)
+        onChanged(body) // fresh state straight from the response — parent mirrors it to CARGO HOLD
+        setLastOutcome(body.outcome)
+        fetchCrew() // JC-14 — the dispatch committed a team; refresh the roster + queue for the builder
+      } catch (err: unknown) {
+        setError(err instanceof Error ? err.message : String(err))
+      } finally {
+        setExploringId(null)
+      }
+    },
+    [onChanged, fetchCrew]
+  )
 
-  if (!state) {
+  if (!system) {
     return (
       <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
         <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>SCANNING SYSTEM…</span>
@@ -76,6 +83,16 @@ export function LocalSystemPanel() {
 
   return (
     <div style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem' }}>
+      {/* #44 — the armed planet's crew picker (JC-13: mounted only while a planet is armed);
+          its DISPATCH performs the scan with the picked team. */}
+      {armedPlanetId !== null && crew !== null && (
+        <TeamBuilder
+          type="EXPLORE"
+          roster={crew.crew}
+          tasks={crew.tasks}
+          onQueue={(leadCrewId, helperCrewIds) => void explore(armedPlanetId, leadCrewId, helperCrewIds)}
+        />
+      )}
       <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', overflow: 'hidden' }}>
         <div
           style={{
@@ -88,9 +105,9 @@ export function LocalSystemPanel() {
             textTransform: 'uppercase',
           }}
         >
-          EXPLORABLE WORLDS // {state.systemName.toUpperCase()} — TURN {state.turn}
+          EXPLORABLE WORLDS // {system.systemName.toUpperCase()} — TURN {system.turn}
         </div>
-        {state.planets.map((row, i) => {
+        {system.planets.map((row, i) => {
           const depth = row.parent !== null ? 1 : 0
           const badge = badgeFor(row.explored, row.hazard)
           return (
@@ -102,7 +119,7 @@ export function LocalSystemPanel() {
                 alignItems: 'center',
                 gap: '0.5rem',
                 padding: depth ? '0.6rem 0.75rem 0.6rem 1.75rem' : '0.6rem 0.75rem',
-                borderBottom: i < state.planets.length - 1 ? '1px solid var(--border)' : 'none',
+                borderBottom: i < system.planets.length - 1 ? '1px solid var(--border)' : 'none',
               }}
             >
               <div style={{ overflow: 'hidden' }}>
@@ -117,7 +134,7 @@ export function LocalSystemPanel() {
                   {row.name}
                 </div>
                 <div style={{ fontSize: '0.57rem', color: 'var(--text-muted)', letterSpacing: '0.06em', marginTop: '2px' }}>
-                  {depth ? `MOON OF ${state.planets.find((p) => p.id === row.parent)?.name ?? '?'} // ${row.type}` : row.type}
+                  {depth ? `MOON OF ${system.planets.find((p) => p.id === row.parent)?.name ?? '?'} // ${row.type}` : row.type}
                 </div>
               </div>
               <div style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
@@ -127,9 +144,9 @@ export function LocalSystemPanel() {
                     variant="OUTLINE"
                     size="SM"
                     disabled={exploringId !== null}
-                    onClick={() => void explore(row.id)}
+                    onClick={() => setArmedPlanetId(armedPlanetId === row.id ? null : row.id)} // #44 — arms/disarms; the builder dispatches
                   >
-                    {exploringId === row.id ? 'SCANNING…' : `${row.name.toUpperCase()} // EXPLORE`}
+                    {exploringId === row.id ? 'SCANNING…' : `${row.name.toUpperCase()} // ${armedPlanetId === row.id ? 'PICK TEAM' : 'EXPLORE'}`}
                   </Button>
                 )}
               </div>
@@ -147,36 +164,6 @@ export function LocalSystemPanel() {
         </div>
       )}
 
-      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', overflow: 'hidden' }}>
-        <div
-          style={{
-            padding: '0.4rem 0.75rem',
-            borderBottom: '1px solid var(--border)',
-            background: 'var(--surface-raised)',
-            fontSize: '0.6rem',
-            color: 'var(--text-muted)',
-            letterSpacing: '0.12em',
-            textTransform: 'uppercase',
-          }}
-        >
-          CARGO HOLD // INVENTORY
-        </div>
-        {state.inventory.length === 0 ? (
-          <div style={{ padding: '0.6rem 0.75rem' }}>
-            <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>EMPTY — EXPLORE WORLDS TO FIND THINGS</span>
-          </div>
-        ) : (
-          state.inventory.map((item) => (
-            <div key={`${item.kind}-${item.name}`} style={{ display: 'flex', justifyContent: 'space-between', padding: '0.5rem 0.75rem' }}>
-              <span style={{ fontSize: '0.62rem', color: 'var(--text-secondary)', letterSpacing: '0.04em', textTransform: 'uppercase' }}>
-                {item.name} <span style={{ color: 'var(--text-muted)' }}>// {item.kind}</span>
-              </span>
-              <Badge variant="ACTIVE">×{item.qty}</Badge>
-            </div>
-          ))
-        )}
-      </div>
-
       {error && (
         <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.5rem 0.75rem' }}>
           <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>SCAN FAILED // {error.toUpperCase()}</span>

components/mission-control.tsx

@@ -1,23 +1,34 @@
 'use client'
 
-import { useEffect, useState } from 'react'
+import { useCallback, useEffect, useState } from 'react'
+import { AdminPanel } from '@/components/admin-panel'
 import { Badge } from '@/components/ui/badge'
-import { Alert, AlertDescription, AlertTitle } from '@/components/ui/alert'
 import { Button } from '@/components/ui/button'
-import { Card, CardContent, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
 import { Panel, PanelContent, PanelHeader, PanelTitle } from '@/components/ui/panel'
 import { Progress } from '@/components/ui/progress'
 import { StatCard } from '@/components/ui/stat-card'
 import { StatusGrid, type SystemEntry } from '@/components/ui/status-grid'
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
-import { Terminal, type TerminalLine } from '@/components/ui/terminal'
+import { CrewPanel } from '@/components/crew-panel'
+import { EventLogPanel } from '@/components/event-log'
 import { LocalSystemPanel } from '@/components/local-system'
+import { MissionPanel } from '@/components/missions'
+import { NextTurnButton } from '@/components/next-turn-button'
+import { ShipSystemsPanel } from '@/components/ship-systems'
+import { SkillTreePanel } from '@/components/skill-tree'
+import { TaskStrip } from '@/components/task-strip'
 import { WorldMapPanel } from '@/components/world-map'
+import { CREW_CAPACITY } from '@/lib/game/ship-costs'
+import type { CrewState, SystemState } from '@/lib/game/save'
+import type { ShipState } from '@/lib/game/ship'
+import type { TechDto } from '@/lib/game/tech'
+import pkg from '@/package.json'
 
 // Interface base: layout + visual treatment rebuilt from the scificn-ui Mission Control
-// showcase (src/app/_pages/showcase/mission-control-content.tsx in baxy5/scificn-ui). The
-// WORLD MAP and LOCAL SYSTEM tabs render live data (/api/world, /api/system); the other
-// tabs keep placeholder content until their own issues land. Single player, no auth, by design.
+// showcase (src/app/_pages/showcase/mission-control-content.tsx in baxy5/scificn-ui). All seven
+// tabs render live data (/api/world, /api/system, /api/crew, /api/ship, /api/tech, /api/missions,
+// /api/events); the right column's CARGO HOLD renders from the lifted /api/system state. Single
+// player, no auth, by design.
 
 function useNarrow(threshold = 900): boolean {
   const [narrow, setNarrow] = useState(
@@ -31,82 +42,126 @@ function useNarrow(threshold = 900): boolean {
   return narrow
 }
 
-function now(): string {
-  return new Date().toLocaleTimeString('en-GB', { hour12: false })
-}
-
-// ── Placeholder content (no game logic — real values land with the turn engine) ──
-
-const shipSystems: SystemEntry[] = [
-  { name: 'REACTOR', status: 'ACTIVE', detail: '94.2%' },
-  { name: 'LIFE SUPPORT', status: 'ACTIVE' },
-  { name: 'NAV COMPUTER', status: 'SCANNING' },
-  { name: 'WEAPONS', status: 'OFFLINE' },
-  { name: 'COMMS', status: 'ACTIVE' },
-]
-
-const crew = [
-  { name: 'CMDR. E. VANCE', role: 'COMMANDER', good: 'STEADY UNDER PRESSURE', bad: 'RIGID — SLOW TO ADAPT' },
-  { name: 'LT. M. OKONKWO', role: 'PILOT', good: 'RECKLESS COURAGE', bad: 'SHORT FUSE' },
-  { name: 'DR. I. SORENSEN', role: 'MEDIC', good: 'CALM IN A CRISIS', bad: 'OVERCAUTIOUS' },
-  { name: 'R. "SPARK" DELACRUZ', role: 'ENGINEER', good: 'FIXES ANYTHING', bad: 'CARELESS WITH FUSES' },
-]
-
-const shipSystemCards = [
-  { name: 'REACTOR', level: 'LV 2', status: 'ACTIVE' as const, actions: ['EXPAND', 'UPGRADE'] },
-  { name: 'LIFE SUPPORT', level: 'LV 1', status: 'ACTIVE' as const, actions: ['EXPAND', 'UPGRADE'] },
-  { name: 'NAV COMPUTER', level: 'LV 3', status: 'SCANNING' as const, actions: ['EXPAND', 'UPGRADE'] },
-  { name: 'WEAPONS', level: 'OFFLINE', status: 'OFFLINE' as const, actions: ['BUILD NEW'] },
-  { name: 'COMMS ARRAY', level: 'LV 1', status: 'ACTIVE' as const, actions: ['EXPAND', 'UPGRADE'] },
-]
-
-const skillCards = [
-  { name: 'ADVANCED FUSION CORE', unlocks: 'REACTOR LV 4 + OVERCLOCK', state: 'AVAILABLE' as const },
-  { name: 'HULL PLATING SCHEMATICS', unlocks: 'BUILD ARMOR BAY MODULES', state: 'AVAILABLE' as const },
-  { name: 'CREW TRAINING PROTOCOLS', unlocks: 'RETRAIN CREW TRAITS', state: 'LOCKED' as const },
-  { name: 'JUMP DRIVE TUNING', unlocks: 'SHORTER JUMP COOLDOWN', state: 'LOCKED' as const },
-]
-
-const encounters = [
-  { name: 'DERELICT FREIGHTER', when: 'T-07:14', id: '#E-102' },
-  { name: 'PIRATE SKIRMISH', when: 'T-22:40', id: '#E-103' },
-  { name: 'ANOMALY FIELD', when: 'T-48:12', id: '#E-104' },
-]
-
-const shipData = [
-  { label: 'TOTAL MODULES', value: '34' },
-  { label: 'HULL INTEGRITY', value: '87%' },
-  { label: 'REACTOR OUTPUT', value: '94.2%' },
-  { label: 'CREW ACTIVE', value: '3 / 6' },
-  { label: 'SECTOR', value: '7G // DRIFT LANE' },
-  { label: 'DRIFT VELOCITY', value: '0.4 KM/S' },
-  { label: 'TURN', value: '12' },
-]
-
-const logLines: TerminalLine[] = [
-  { type: 'system', text: 'SPACEWANDERER // INITIALIZING SHIP SYSTEMS...', timestamp: now() },
-  { type: 'output', text: 'HULL SCAN COMPLETE — INTEGRITY 87%', timestamp: now() },
-  { type: 'output', text: 'REACTOR OUTPUT STABLE AT 94.2%', timestamp: now() },
-  { type: 'output', text: 'CREW MANIFEST LOADED — 3 ACTIVE PERSONNEL', timestamp: now() },
-  { type: 'warn', text: 'WEAPONS OFFLINE — MODULE NOT INSTALLED', timestamp: now() },
-  { type: 'system', text: 'ALL SYSTEMS NOMINAL. AWAITING FIRST TURN.', timestamp: now() },
-]
+// Must match the TabsTrigger values in the render below — used to validate the tab persisted for
+// #27 (an unknown stored value falls back to the default).
+const TAB_IDS = ['world-map', 'local-system', 'crew', 'ship-systems', 'skill-tree', 'missions', 'event-log']
+const ACTIVE_TAB_KEY = 'sw-active-tab'
 
 export function MissionControl() {
   const narrow = useNarrow()
   const [tick, setTick] = useState(0)
+  // Ship + system state is owned here (not in the tab panels): the SHIP SYSTEMS tab mirrors ship
+  // actions via setShip, and the right column's CARGO HOLD renders from the lifted inventory —
+  // the LOCAL SYSTEM tab reports each scan's response up via setSystem. Crew count feeds the
+  // roster bar — refetched on page load, like the other panels.
+  const [ship, setShip] = useState<ShipState | null>(null)
+  const [system, setSystem] = useState<SystemState | null>(null)
+  const [techs, setTechs] = useState<TechDto[] | null>(null)
+  const [crewCount, setCrewCount] = useState<number | null>(null)
+  // #27 — the active tab survives a page refresh. Restored from localStorage on mount; null until
+  // then so SSR and the first client render agree on the default tab (no hydration mismatch).
+  const [activeTab, setActiveTab] = useState<string | null>(null)
+  // #38 — admin DB CRUD overlay, opened from the header.
+  const [adminOpen, setAdminOpen] = useState(false)
+  // #44 (v0.10.1) — true only after hydration: the banner clock must render '' in both SSR and the
+  // first client render, otherwise the prerendered (build-time) string desyncs at hydration.
+  const [hydrated, setHydrated] = useState(false)
+
+  // #44 — the four mount fetches, extracted into a callback so the NEXT TURN button (5b) can
+  // re-run them after /api/turn: a tick can change all four snapshots (the turn always; inventory
+  // on an explore resolve, system on a jump resolve, the roster on a recruit, tech on a research
+  // completion) — a strict superset of refreshSystem, which stays for the jump callback. Same
+  // failure policy as the mount fetch — keep the old state on error.
+  const refreshAll = useCallback(() => {
+    let cancelled = false
+    fetch('/api/ship')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as ShipState
+      })
+      .then((s) => {
+        if (!cancelled) setShip(s)
+      })
+      .catch(() => {}) // left column + tab keep their loading state on failure
+    fetch('/api/system')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as SystemState
+      })
+      .then((s) => {
+        if (!cancelled) setSystem(s)
+      })
+      .catch(() => {})
+    fetch('/api/tech')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as TechDto[]
+      })
+      .then((t) => {
+        if (!cancelled) setTechs(t)
+      })
+      .catch(() => {})
+    fetch('/api/crew')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as CrewState // { crew, tasks } — the endpoint wraps the roster (JC-7)
+      })
+      .then((c) => {
+        if (!cancelled) setCrewCount(c.crew.length)
+      })
+      .catch(() => {})
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  // The effect returns refreshAll's cleanup, so unmount still cancels the in-flight setStates.
+  useEffect(() => refreshAll(), [refreshAll])
 
   useEffect(() => {
     const id = setInterval(() => setTick((t) => t + 1), 1000)
     return () => clearInterval(id)
   }, [])
 
-  const timeStr = new Date().toLocaleTimeString('en-GB', { hour12: false })
+  // #44 (v0.10.1) — flip after hydration so the banner clock can start (SSR/first render both '').
+  useEffect(() => setHydrated(true), [])
+
+  // #27 — restore the persisted tab once on mount (validated against TAB_IDS).
+  useEffect(() => {
+    const stored = window.localStorage.getItem(ACTIVE_TAB_KEY)
+    if (stored && TAB_IDS.includes(stored)) setActiveTab(stored)
+  }, [])
+
+  // #30 — re-fetch /api/system after a jump: WorldMapPanel owns the world state, so without this
+  // the lifted system state stays on the previous system until a page refresh. Same failure
+  // policy as the mount fetch — keep the old state on error.
+  const refreshSystem = useCallback(() => {
+    fetch('/api/system')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as SystemState
+      })
+      .then((s) => setSystem(s))
+      .catch(() => {})
+  }, [])
+
+  // #44 (v0.10.1) — hydration-safe: '' until hydrated (SSR and first client render agree), then the
+  // live time on the 1s tick — no more build-time clock baked into the prerendered HTML.
+  const timeStr = hydrated ? new Date().toLocaleTimeString('en-GB', { hour12: false }) : ''
+
+  // Slugs of the researched techs — drives the effective caps + build gates in the SHIP SYSTEMS
+  // tab via the same pure helpers the API enforces (lib/game/tech.ts).
+  const researchedSlugs = new Set((techs ?? []).filter((t) => t.state === 'RESEARCHED').map((t) => t.slug))
+  const navAi = researchedSlugs.has('NAV_AI') // #35 — two-hop systems become jumpable chart fields
 
   return (
     <div
       style={{
         minHeight: '100vh',
+        // Wide layout is pinned to the viewport so only the columns scroll internally (#21);
+        // narrow keeps natural flow with body scroll.
+        height: narrow ? undefined : '100vh',
+        overflow: narrow ? undefined : 'hidden',
         background: 'var(--background)',
         display: 'flex',
         flexDirection: 'column',
@@ -137,7 +192,7 @@ export function MissionControl() {
             flexShrink: 0,
           }}
         >
-          ◄ SHIP
+          v{pkg.version}
         </span>
 
         <span style={{ color: 'var(--border)', flexShrink: 0 }}>│</span>
@@ -177,6 +232,9 @@ export function MissionControl() {
 
         <Badge variant="SCANNING">SECTOR SCAN</Badge>
 
+        {/* #38 — admin DB CRUD, no auth by design (see components/admin-panel.tsx) */}
+        <Button size="SM" onClick={() => setAdminOpen(true)}>ADMIN</Button>
+
         <span
           style={{
             color: 'var(--color-green)',
@@ -192,10 +250,13 @@ export function MissionControl() {
         </span>
       </header>
 
+      {adminOpen && <AdminPanel onClose={() => setAdminOpen(false)} />}
+
       {/* ── BODY ── */}
       <div
         style={{
           flex: 1,
+          minHeight: 0, // let the grid below be constrained to the viewport instead of growing it
           display: 'flex',
           flexDirection: 'column',
           gap: '1px',
@@ -242,8 +303,9 @@ export function MissionControl() {
         <div
           style={{
             flex: 1,
+            minHeight: 0, // same — the columns' overflowY:auto then scrolls inside their tracks
             display: 'grid',
-            gridTemplateColumns: narrow ? '1fr' : '260px 1fr 240px',
+            gridTemplateColumns: narrow ? '1fr' : '320px 1fr 360px',
             gap: '1px',
             background: 'var(--border)',
           }}
@@ -263,11 +325,25 @@ export function MissionControl() {
               <PanelHeader>
                 <PanelTitle>SHIP SYSTEMS</PanelTitle>
                 <div style={{ marginLeft: 'auto' }}>
-                  <Badge variant="ACTIVE">4 ONLINE</Badge>
+                  <Badge variant={ship && ship.systems.some((s) => s.built) ? 'ACTIVE' : 'OFFLINE'}>
+                    {ship ? `${ship.systems.filter((s) => s.built).length} ONLINE` : '—'}
+                  </Badge>
                 </div>
               </PanelHeader>
 
-              <StatusGrid systems={shipSystems} />
+              {ship ? (
+                <StatusGrid
+                  systems={ship.systems.map((s) => ({
+                    name: s.type,
+                    status: s.built ? ('ACTIVE' as const) : ('OFFLINE' as const),
+                    detail: s.built ? `LV ${s.level} · CAP ${s.capacity}` : undefined,
+                  }))}
+                />
+              ) : (
+                <div style={{ padding: '0.5rem 0.75rem' }}>
+                  <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING…</span>
+                </div>
+              )}
             </Panel>
 
             <Panel notch="sm">
@@ -275,11 +351,40 @@ export function MissionControl() {
                 <PanelTitle>VESSEL METRICS</PanelTitle>
               </PanelHeader>
               <PanelContent>
-                <div style={{ display: 'flex', flexDirection: 'column', gap: '0.875rem' }}>
-                  <Progress label="HULL INTEGRITY" value={87} />
-                  <Progress label="REACTOR OUTPUT" value={94} />
-                  <Progress label="CREW ROSTER / 6" value={50} />
-                </div>
+                {ship ? (
+                  // Bars driven by real values: hull/reactor from system levels (level × 20, capped),
+                  // crew roster vs the display cap; SECTOR/TURN rows folded in from the old SHIP DATA
+                  // placeholder (the rest of it duplicated these bars or had no game equivalent).
+                  <div style={{ display: 'flex', flexDirection: 'column', gap: '0.875rem' }}>
+                    <Progress label="HULL INTEGRITY" value={Math.min(100, (ship.systems.find((s) => s.type === 'HULL')?.level ?? 0) * 20)} />
+                    <Progress label="REACTOR OUTPUT" value={Math.min(100, (ship.systems.find((s) => s.type === 'REACTOR')?.level ?? 0) * 20)} />
+                    <Progress label={`CREW ROSTER / ${CREW_CAPACITY}`} value={Math.round(((crewCount ?? 0) / CREW_CAPACITY) * 100)} />
+                    <div style={{ display: 'flex', flexDirection: 'column' }}>
+                      {[
+                        { label: 'SECTOR', value: (system?.systemName ?? '—').toUpperCase() },
+                        { label: 'TURN', value: String(ship.turn) },
+                      ].map((item, i) => (
+                        <div
+                          key={item.label}
+                          style={{
+                            display: 'flex',
+                            justifyContent: 'space-between',
+                            alignItems: 'center',
+                            padding: '0.4rem 0',
+                            borderBottom: i < 1 ? '1px solid var(--border)' : 'none',
+                          }}
+                        >
+                          <span style={{ fontSize: '0.6rem', color: 'var(--text-muted)', letterSpacing: '0.1em' }}>{item.label}</span>
+                          <span style={{ fontSize: '0.78rem', color: 'var(--color-green)', textShadow: 'var(--text-glow-green)', letterSpacing: '0.04em', fontWeight: 600 }}>
+                            {item.value}
+                          </span>
+                        </div>
+                      ))}
+                    </div>
+                  </div>
+                ) : (
+                  <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING…</span>
+                )}
               </PanelContent>
             </Panel>
           </div>
@@ -295,7 +400,9 @@ export function MissionControl() {
               overflowY: 'auto',
             }}
           >
-            <Panel notch="md" style={{ flex: 1 }}>
+            {/* flex column + minHeight:0 so the tab content scrolls inside the panel (#21) —
+                the Panel root's default overflow:hidden would otherwise clip it */}
+            <Panel notch="md" style={{ flex: 1, minHeight: 0, display: 'flex', flexDirection: 'column' }}>
               <PanelHeader>
                 <PanelTitle>OPERATIONS // SHIP COMMAND</PanelTitle>
                 <div style={{ marginLeft: 'auto', display: 'flex', gap: '0.5rem' }}>
@@ -303,15 +410,29 @@ export function MissionControl() {
                 </div>
               </PanelHeader>
 
-              <PanelContent style={{ padding: 0 }}>
-                <Tabs defaultValue="world-map">
-                  <TabsList
-                    style={{
-                      padding: '0 1rem',
-                      background: 'var(--surface-raised)',
-                      overflowX: 'auto',
-                    }}
-                  >
+              <PanelContent style={{ padding: 0, flex: 1, minHeight: 0, overflowY: 'auto' }}>
+                {/* Flex column at least pane-tall so a tab can fill it (#36). min-height, not height:
+                    tall tabs grow the box to their content, which keeps the sticky tab bar's containing
+                    block spanning the whole scroll range (a capped height releases the pin on deep
+                    scrolls) and means items never overflow the box, so nothing gets shrink-squashed. */}
+                <Tabs
+                  value={activeTab ?? 'world-map'}
+                  onValueChange={(v) => {
+                    setActiveTab(v)
+                    window.localStorage.setItem(ACTIVE_TAB_KEY, v) // #27 — keep the tab across refreshes
+                  }}
+                  style={{ display: 'flex', flexDirection: 'column', minHeight: '100%' }}
+                >
+                    <TabsList
+                      style={{
+                        padding: '0 1rem',
+                        background: 'var(--surface-raised)', // opaque — content scrolls under it (#31)
+                        overflowX: 'auto',
+                        position: 'sticky', // #31 — pinned in both modes: to the top of the OPERATIONS
+                        top: 0, // scroll area (wide) and to the viewport when the body scrolls (narrow)
+                        zIndex: 1,
+                      }}
+                    >
                     <TabsTrigger value="world-map">WORLD MAP</TabsTrigger>
                     <TabsTrigger value="local-system">LOCAL SYSTEM</TabsTrigger>
                     <TabsTrigger value="crew">CREW</TabsTrigger>
@@ -321,203 +442,51 @@ export function MissionControl() {
                     <TabsTrigger value="event-log">EVENT LOG</TabsTrigger>
                   </TabsList>
 
-                  {/* WORLD MAP TAB — live data from /api/world */}
-                  <TabsContent value="world-map" style={{ margin: 0, padding: '1rem' }}>
-                    <WorldMapPanel height={380} />
+                  {/* WORLD MAP TAB — live data from /api/world; fills the whole pane (#36). Wide mode:
+                      flex column so the panel can fill it with pure flex sizing (a min-height-only
+                      container breaks percentage resolution, so no height:'100%' anywhere in this chain). */}
+                  <TabsContent
+                    value="world-map"
+                    style={{ margin: 0, padding: '1rem', ...(!narrow ? { display: 'flex', flexDirection: 'column', flex: 1, minHeight: 0 } : {}) }}
+                  >
+                    <WorldMapPanel height={380} narrow={narrow} navAi={navAi} onJumped={refreshSystem} />
                   </TabsContent>
 
-                  {/* LOCAL SYSTEM TAB — live data from /api/system */}
+                  {/* LOCAL SYSTEM TAB — live data (state owned by MissionControl; scans report up) */}
                   <TabsContent value="local-system" style={{ margin: 0, padding: '1rem' }}>
-                    <LocalSystemPanel />
+                    <LocalSystemPanel system={system} onChanged={setSystem} />
                   </TabsContent>
 
-                  {/* CREW TAB */}
+                  {/* CREW TAB — live data from /api/crew */}
                   <TabsContent value="crew" style={{ margin: 0, padding: '1rem' }}>
-                    <div
-                      style={{
-                        display: 'grid',
-                        gridTemplateColumns: narrow ? '1fr' : 'repeat(2, 1fr)',
-                        gap: '0.75rem',
-                      }}
-                    >
-                      {crew.map((member) => (
-                        <Card key={member.name}>
-                          <CardHeader>
-                            <div style={{ display: 'flex', alignItems: 'center' }}>
-                              <CardTitle>{member.name}</CardTitle>
-                              <Badge variant="ACTIVE" className="ml-auto">
-                                ACTIVE
-                              </Badge>
-                            </div>
-                            <p
-                              style={{
-                                fontSize: '0.6rem',
-                                color: 'var(--text-muted)',
-                                letterSpacing: '0.1em',
-                                textTransform: 'uppercase',
-                              }}
-                            >
-                              {member.role}
-                            </p>
-                          </CardHeader>
-                          <CardContent style={{ display: 'flex', flexDirection: 'column', gap: '0.4rem' }}>
-                            <div style={{ fontSize: '0.7rem', letterSpacing: '0.05em' }}>
-                              <span style={{ color: 'var(--color-green)' }}>+ </span>
-                              <span style={{ color: 'var(--text-secondary)' }}>{member.good}</span>
-                            </div>
-                            <div style={{ fontSize: '0.7rem', letterSpacing: '0.05em' }}>
-                              <span style={{ color: 'var(--color-red)' }}>- </span>
-                              <span style={{ color: 'var(--text-secondary)' }}>{member.bad}</span>
-                            </div>
-                          </CardContent>
-                        </Card>
-                      ))}
-                    </div>
+                    <CrewPanel narrow={narrow} />
                   </TabsContent>
 
-                  {/* SHIP SYSTEMS TAB */}
+                  {/* SHIP SYSTEMS TAB — live data from /api/ship (state owned by MissionControl) */}
                   <TabsContent value="ship-systems" style={{ margin: 0, padding: '1rem' }}>
-                    <div
-                      style={{
-                        display: 'grid',
-                        gridTemplateColumns: narrow ? '1fr' : 'repeat(2, 1fr)',
-                        gap: '0.75rem',
-                      }}
-                    >
-                      {shipSystemCards.map((system) => (
-                        <Card key={system.name}>
-                          <CardHeader>
-                            <div style={{ display: 'flex', alignItems: 'center' }}>
-                              <CardTitle>{system.name}</CardTitle>
-                              <Badge variant={system.status} className="ml-auto">
-                                {system.level}
-                              </Badge>
-                            </div>
-                          </CardHeader>
-                          <CardContent>
-                            <p style={{ fontSize: '0.65rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>
-                              MODULE BAY // PLACEHOLDER READOUT
-                            </p>
-                          </CardContent>
-                          <CardFooter className="gap-2">
-                            {system.actions.map((action) => (
-                              <Button key={action} variant="OUTLINE" size="SM">
-                                {action}
-                              </Button>
-                            ))}
-                          </CardFooter>
-                        </Card>
-                      ))}
-                    </div>
+                    <ShipSystemsPanel ship={ship} narrow={narrow} onChanged={setShip} researchedSlugs={researchedSlugs} />
                   </TabsContent>
 
-                  {/* SKILL TREE TAB */}
+                  {/* SKILL TREE TAB — live data from /api/tech (state owned by MissionControl) */}
                   <TabsContent value="skill-tree" style={{ margin: 0, padding: '1rem' }}>
-                    <div
-                      style={{
-                        display: 'grid',
-                        gridTemplateColumns: narrow ? '1fr' : 'repeat(2, 1fr)',
-                        gap: '0.75rem',
-                      }}
-                    >
-                      {skillCards.map((skill) => (
-                        <Card key={skill.name}>
-                          <CardHeader>
-                            <div style={{ display: 'flex', alignItems: 'center' }}>
-                              <CardTitle>{skill.name}</CardTitle>
-                              <Badge variant={skill.state === 'AVAILABLE' ? 'ACTIVE' : 'OFFLINE'} className="ml-auto">
-                                {skill.state}
-                              </Badge>
-                            </div>
-                          </CardHeader>
-                          <CardContent>
-                            <p style={{ fontSize: '0.65rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>
-                              UNLOCKS: {skill.unlocks}
-                            </p>
-                          </CardContent>
-                          <CardFooter>
-                            <Button variant="OUTLINE" size="SM">
-                              RESEARCH
-                            </Button>
-                          </CardFooter>
-                        </Card>
-                      ))}
-                    </div>
+                    <SkillTreePanel techs={techs} ship={ship} narrow={narrow} onResearched={setTechs} />
                   </TabsContent>
 
-                  {/* MISSIONS TAB */}
+                  {/* MISSIONS TAB — live data from /api/missions */}
                   <TabsContent value="missions" style={{ margin: 0, padding: '1rem' }}>
-                    <div
-                      style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem' }}
-                    >
-                      <Alert variant="STATUS">
-                        <AlertTitle>ENCOUNTER #E-102 — DERELICT FREIGHTER</AlertTitle>
-                        <AlertDescription>
-                          Placeholder briefing. Real encounter resolution lands with the turn engine.
-                        </AlertDescription>
-                      </Alert>
-
-                      <div
-                        style={{
-                          display: 'grid',
-                          gridTemplateColumns: narrow ? '1fr' : '1fr 1fr',
-                          gap: '0.625rem',
-                        }}
-                      >
-                        {[
-                          { label: 'DESTINATION', value: 'SECTOR 7G // DRIFT LANE' },
-                          { label: 'ETA', value: 'T-07:14 (PLACEHOLDER)' },
-                          { label: 'THREAT LEVEL', value: 'LOW — UNMANNED' },
-                          { label: 'CARGO MANIFEST', value: 'UNKNOWN' },
-                        ].map((item) => (
-                          <div
-                            key={item.label}
-                            style={{
-                              padding: '0.75rem',
-                              background: 'var(--surface)',
-                              border: '1px solid var(--border)',
-                            }}
-                          >
-                            <div
-                              style={{
-                                fontSize: '0.55rem',
-                                color: 'var(--text-muted)',
-                                letterSpacing: '0.12em',
-                                marginBottom: '0.35rem',
-                              }}
-                            >
-                              {item.label}
-                            </div>
-                            <div
-                              style={{
-                                fontSize: '0.8rem',
-                                color: 'var(--text-secondary)',
-                                letterSpacing: '0.04em',
-                              }}
-                            >
-                              {item.value}
-                            </div>
-                          </div>
-                        ))}
-                      </div>
-                    </div>
+                    <MissionPanel />
                   </TabsContent>
 
                   {/* EVENT LOG TAB */}
                   <TabsContent value="event-log" style={{ margin: 0, padding: '1rem' }}>
-                    <Terminal
-                      lines={logLines}
-                      title="SHIP LOG // PLACEHOLDER FEED"
-                      height="22rem"
-                      style={{ width: '100%' }}
-                    />
+                    <EventLogPanel />
                   </TabsContent>
                 </Tabs>
               </PanelContent>
             </Panel>
           </div>
 
-          {/* ── RIGHT: UPCOMING ENCOUNTERS + SHIP DATA ── */}
+          {/* ── RIGHT: CARGO HOLD (persistent — inventory lifted from /api/system) ── */}
           <div
             style={{
               background: 'var(--background)',
@@ -530,110 +499,34 @@ export function MissionControl() {
           >
             <Panel notch="sm">
               <PanelHeader>
-                <PanelTitle>UPCOMING ENCOUNTERS</PanelTitle>
-                <div style={{ marginLeft: 'auto' }}>
-                  <Badge variant="SCANNING">{encounters.length} QUEUED</Badge>
-                </div>
+                <PanelTitle>CARGO HOLD // INVENTORY</PanelTitle>
+                {system && (
+                  <div style={{ marginLeft: 'auto' }}>
+                    <Badge variant={system.inventory.length > 0 ? 'ACTIVE' : 'OFFLINE'}>
+                      {system.inventory.reduce((n, i) => n + i.qty, 0)} UNITS
+                    </Badge>
+                  </div>
+                )}
               </PanelHeader>
               <PanelContent style={{ padding: 0 }}>
-                <div style={{ display: 'flex', flexDirection: 'column' }}>
-                  {encounters.map((enc, i) => {
-                    const isNext = i === 0
-                    const isLast = i === encounters.length - 1
-                    return (
-                      <div
-                        key={enc.id}
-                        style={{
-                          padding: '0.6rem 0.75rem',
-                          borderBottom: isLast ? 'none' : '1px solid var(--border)',
-                          background: isNext ? 'var(--surface-raised)' : 'transparent',
-                        }}
-                      >
-                        <div
-                          style={{
-                            display: 'flex',
-                            justifyContent: 'space-between',
-                            alignItems: 'flex-start',
-                            gap: '0.5rem',
-                          }}
-                        >
-                          <div style={{ overflow: 'hidden', flex: 1 }}>
-                            <div
-                              style={{
-                                fontSize: '0.68rem',
-                                color: isNext ? 'var(--text-secondary)' : 'var(--text-muted)',
-                                letterSpacing: '0.04em',
-                                overflow: 'hidden',
-                                textOverflow: 'ellipsis',
-                                whiteSpace: 'nowrap',
-                                textTransform: 'uppercase',
-                              }}
-                            >
-                              {enc.name}
-                            </div>
-                            <div
-                              style={{
-                                fontSize: '0.57rem',
-                                color: 'var(--text-muted)',
-                                letterSpacing: '0.06em',
-                                marginTop: '2px',
-                              }}
-                            >
-                              {enc.when} // {enc.id}
-                            </div>
-                          </div>
-                          <Badge variant={isNext ? 'WARNING' : 'SCANNING'}>
-                            {isNext ? 'NEXT' : 'SCHED'}
-                          </Badge>
-                        </div>
-                      </div>
-                    )
-                  })}
-                </div>
-              </PanelContent>
-            </Panel>
-
-            <Panel notch="sm">
-              <PanelHeader>
-                <PanelTitle>SHIP DATA</PanelTitle>
-              </PanelHeader>
-              <PanelContent>
-                <div style={{ display: 'flex', flexDirection: 'column' }}>
-                  {shipData.map((item, i) => (
-                    <div
-                      key={item.label}
-                      style={{
-                        display: 'flex',
-                        justifyContent: 'space-between',
-                        alignItems: 'center',
-                        padding: '0.4rem 0',
-                        borderBottom:
-                          i < shipData.length - 1 ? '1px solid var(--border)' : 'none',
-                      }}
-                    >
-                      <span
-                        style={{
-                          fontSize: '0.6rem',
-                          color: 'var(--text-muted)',
-                          letterSpacing: '0.1em',
-                        }}
-                      >
-                        {item.label}
-                      </span>
-                      <span
-                        style={{
-                          fontSize: '0.78rem',
-                          color: 'var(--color-green)',
-                          textShadow: 'var(--text-glow-green)',
-                          letterSpacing: '0.04em',
-                          fontWeight: 600,
-                        }}
-                      >
-                        {item.value}
+                {!system ? (
+                  <div style={{ padding: '0.6rem 0.75rem' }}>
+                    <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING…</span>
+                  </div>
+                ) : system.inventory.length === 0 ? (
+                  <div style={{ padding: '0.6rem 0.75rem' }}>
+                    <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>EMPTY — EXPLORE WORLDS TO FIND THINGS</span>
+                  </div>
+                ) : (
+                  system.inventory.map((item) => (
+                    <div key={`${item.kind}-${item.name}`} style={{ display: 'flex', justifyContent: 'space-between', padding: '0.5rem 0.75rem' }}>
+                      <span style={{ fontSize: '0.62rem', color: 'var(--text-secondary)', letterSpacing: '0.04em', textTransform: 'uppercase' }}>
+                        {item.name} <span style={{ color: 'var(--text-muted)' }}>// {item.kind}</span>
                       </span>
+                      <Badge variant="ACTIVE">×{item.qty}</Badge>
                     </div>
-                  ))}
-                </div>
+                  ))
+                )}
               </PanelContent>
             </Panel>
           </div>
@@ -673,6 +566,17 @@ export function MissionControl() {
 
         <Badge variant="ACTIVE">SYS ONLINE</Badge>
       </footer>
+
+      {/* #44 — the manual tick control (5b): fixed bottom-right, outside the tab grid so it
+          stays visible on every tab (Radix unmounts inactive tabs — the button only refreshes
+          the snapshots this shell owns) */}
+      <NextTurnButton turn={ship?.turn ?? null} onTicked={refreshAll} />
+
+      {/* #44 — the active-tasks strip: fixed bottom-left (same mount convention as the button —
+          outside the tab grid so it stays visible on every tab). Data: the shell's system
+          snapshot (JC-15) — refreshAll re-runs /api/system on every turn, so it updates on
+          every shell refresh with no fetch of its own. */}
+      <TaskStrip tasks={system?.tasks ?? []} />
     </div>
   )
 }

components/missions.tsx

@@ -0,0 +1,120 @@
+'use client'
+
+import { useCallback, useEffect, useState } from 'react'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import { Card, CardContent, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
+import type { MissionDto } from '@/lib/game/missions'
+
+// MISSIONS tab — live data. Fetches /api/missions on mount (Radix Tabs unmounts inactive tabs, so it
+// refetches whenever the tab is opened); accept responses are applied directly (no polling). ACCEPT is
+// enabled only when the contract is AVAILABLE and no other mission is ACTIVE — mirroring what
+// POST /api/missions/{id}/accept enforces.
+
+export function MissionPanel() {
+  const [missions, setMissions] = useState<MissionDto[] | null>(null)
+  const [error, setError] = useState<string | null>(null)
+  const [busyId, setBusyId] = useState<number | null>(null) // one action at a time — turn-based game
+
+  useEffect(() => {
+    let cancelled = false
+    fetch('/api/missions')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as MissionDto[]
+      })
+      .then((m) => {
+        if (!cancelled) setMissions(m)
+      })
+      .catch((err: unknown) => {
+        if (!cancelled) setError(err instanceof Error ? err.message : String(err))
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  const accept = useCallback(async (mission: MissionDto) => {
+    setBusyId(mission.id)
+    setError(null)
+    try {
+      const res = await fetch(`/api/missions/${mission.id}/accept`, { method: 'POST' })
+      const data = (await res.json()) as MissionDto[] & { error?: string }
+      if (!res.ok) throw new Error(data.error ?? `HTTP ${res.status}`)
+      setMissions(data) // response is the fresh board — apply directly
+    } catch (err: unknown) {
+      setError(err instanceof Error ? err.message : String(err))
+    } finally {
+      setBusyId(null)
+    }
+  }, [])
+
+  if (!missions && !error) {
+    return (
+      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING MISSIONS…</span>
+      </div>
+    )
+  }
+
+  const active = (missions ?? []).find((m) => m.state === 'ACTIVE')
+
+  return (
+    <div style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem' }}>
+      {error && (
+        <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+          <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>{error.toUpperCase()}</span>
+        </div>
+      )}
+      <div style={{ display: 'grid', gridTemplateColumns: 'repeat(3, 1fr)', gap: '0.75rem' }}>
+        {(missions ?? []).map((mission) => (
+          <MissionCard key={mission.id} mission={mission} busy={busyId === mission.id} blockedByActive={!!active && active.id !== mission.id} onAccept={accept} />
+        ))}
+      </div>
+    </div>
+  )
+}
+
+function MissionCard({
+  mission,
+  busy,
+  blockedByActive,
+  onAccept,
+}: {
+  mission: MissionDto
+  busy: boolean
+  blockedByActive: boolean
+  onAccept: (mission: MissionDto) => void
+}) {
+  const acceptDisabled = busy || mission.state !== 'AVAILABLE' || blockedByActive
+
+  return (
+    <Card>
+      <CardHeader>
+        <div style={{ display: 'flex', alignItems: 'center' }}>
+          <CardTitle>{mission.type}</CardTitle>
+          <Badge variant={mission.state === 'ACTIVE' ? 'ACTIVE' : mission.state === 'AVAILABLE' ? 'SCANNING' : 'OFFLINE'} className="ml-auto">
+            {mission.state}
+          </Badge>
+        </div>
+      </CardHeader>
+      <CardContent>
+        <p style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>CONTRACT // #{mission.id}</p>
+        <p style={{ fontSize: '0.65rem', color: 'var(--text-secondary)', letterSpacing: '0.08em' }}>{mission.description.toUpperCase()}</p>
+        <p style={{ fontSize: '0.62rem', color: 'var(--color-green)', letterSpacing: '0.08em' }}>
+          REWARD {mission.rewardQty}× {mission.rewardKind === 'resource' ? 'RESOURCES' : 'PARTS'}
+        </p>
+        {mission.type === 'EXPLORE' && (
+          <p style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>
+            PROGRESS // {mission.progress}/{mission.progressTarget}
+          </p>
+        )}
+      </CardContent>
+      <CardFooter>
+        <Button variant="OUTLINE" size="SM" disabled={acceptDisabled} onClick={() => onAccept(mission)}>
+          ACCEPT
+        </Button>
+      </CardFooter>
+    </Card>
+  )
+}

components/next-turn-button.tsx

@@ -0,0 +1,54 @@
+'use client'
+
+import { useState } from 'react'
+import { Button } from '@/components/ui/button'
+
+// NEXT TURN — the manual tick control (5b): a fixed bottom-right button + the current turn from
+// the ship snapshot the shell holds. One click = POST /api/turn (no body); on success the shell
+// re-fetches its snapshots. Review Focus 4: the button is NEVER disabled by game state — an
+// empty queue is a FREE SKIP (the route always returns 200) — and the only transient is an
+// in-flight request, which the handler ignores. `disabled` is never set, so the cva
+// disabled:opacity-40 styling never applies either.
+
+export function NextTurnButton({ turn, onTicked }: { turn: number | null; onTicked: () => void }) {
+  const [inFlight, setInFlight] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const tick = () => {
+    if (inFlight) return // the only guard — a transient, never a game-state disable
+    setInFlight(true)
+    setError(null)
+    fetch('/api/turn', { method: 'POST' })
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        onTicked() // the same app-wide snapshot refresh the shell uses after every other action
+      })
+      .catch((err: unknown) => setError(err instanceof Error ? err.message : String(err)))
+      .finally(() => setInFlight(false))
+  }
+
+  return (
+    <div
+      style={{
+        position: 'fixed',
+        right: '1rem',
+        bottom: '1rem',
+        zIndex: 60, // above the header/footer's 50
+        display: 'flex',
+        flexDirection: 'column',
+        alignItems: 'flex-end',
+        gap: '0.375rem',
+      }}
+    >
+      {error && (
+        <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>{error.toUpperCase()}</span>
+      )}
+      <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>
+        TURN {turn ?? '—'}
+      </span>
+      <Button variant="EXEC" size="SM" onClick={tick}>
+        NEXT TURN
+      </Button>
+    </div>
+  )
+}

components/ship-systems.tsx

@@ -0,0 +1,203 @@
+'use client'
+
+import { useCallback, useEffect, useState } from 'react'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import { Card, CardContent, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
+import { TeamBuilder } from '@/components/team-builder'
+import { BUILD_PART_COST, expandCost, totalQty, upgradeCost } from '@/lib/game/ship-costs'
+import type { ShipState, ShipSystemDto } from '@/lib/game/ship'
+import type { CrewState } from '@/lib/game/save'
+import { buildGate, effectiveCapacityCap, effectiveLevelCap } from '@/lib/game/tech'
+import type { TaskType } from '@/lib/game/tasks'
+
+// SHIP SYSTEMS tab — live data. The parent (MissionControl) owns the ship state so the left
+// column mirrors actions immediately; this panel applies each action's response directly via
+// onChanged (no polling). A card's UPGRADE / EXPAND / BUILD button ARMS the action (#44): the
+// crew team builder mounts at the top of the column and its DISPATCH POSTs the ship route with
+// the team. Buttons are disabled when unaffordable, capped or gated by an
+// unresearched tech, using the same pure helpers the API enforces (lib/game/ship-costs.ts +
+// lib/game/tech.ts).
+
+interface ShipSystemsPanelProps {
+  ship: ShipState | null
+  narrow?: boolean
+  onChanged: (next: ShipState) => void
+  researchedSlugs: Set<string> // slugs of researched techs — raises caps, lifts build gates
+}
+
+export function ShipSystemsPanel({ ship, narrow, onChanged, researchedSlugs }: ShipSystemsPanelProps) {
+  const [error, setError] = useState<string | null>(null)
+  const [busy, setBusy] = useState(false) // one action at a time — turn-based game
+  // #44 — the armed ship action (which card + which of UPGRADE/EXPAND/BUILD); the builder above
+  // the grid picks the team and its DISPATCH performs it.
+  const [armed, setArmed] = useState<{ type: TaskType; url: string; body: Record<string, unknown>; systemId: number } | null>(null)
+  const [crew, setCrew] = useState<CrewState | null>(null)
+
+  // JC-14 — the roster + queue the builder mirrors: fetched on mount and after every
+  // successful dispatch (the action response updates the ship state, not the roster).
+  // Keep-old-on-failure, the house .catch(() => {}) pattern.
+  const fetchCrew = useCallback(() => {
+    fetch('/api/crew')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as CrewState
+      })
+      .then((c) => setCrew(c))
+      .catch(() => {})
+  }, [])
+
+  useEffect(() => {
+    fetchCrew()
+  }, [fetchCrew])
+
+  // #44 — arm an action (toggle: clicking the armed action's button again disarms it).
+  const arm = useCallback((type: TaskType, url: string, body: Record<string, unknown>, systemId: number) => {
+    setArmed((a) => (a && a.systemId === systemId && a.type === type ? null : { type, url, body, systemId }))
+  }, [])
+
+  if (!ship) {
+    return (
+      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING SHIP SYSTEMS…</span>
+      </div>
+    )
+  }
+
+  const resources = totalQty(ship.inventory, 'resource')
+  const parts = totalQty(ship.inventory, 'part')
+
+  async function act(url: string, body: unknown) {
+    setBusy(true)
+    setError(null)
+    setArmed(null)
+    try {
+      const res = await fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) })
+      const data = (await res.json()) as ShipState & { error?: string }
+      if (!res.ok) throw new Error(data.error ?? `HTTP ${res.status}`)
+      onChanged(data) // response is the fresh ship state — apply directly
+      fetchCrew() // JC-14 — the dispatch committed a team; refresh the roster + queue for the builder
+    } catch (err: unknown) {
+      setError(err instanceof Error ? err.message : String(err))
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  return (
+    <div style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem' }}>
+      {/* #44 — the armed ship action's crew picker (JC-13: mounted only while an action is
+          armed); its DISPATCH performs it with the picked team. */}
+      {armed !== null && crew !== null && (
+        <TeamBuilder
+          type={armed.type}
+          roster={crew.crew}
+          tasks={crew.tasks}
+          onQueue={(leadCrewId, helperCrewIds) => void act(armed.url, { ...armed.body, leadCrewId, helperCrewIds })}
+        />
+      )}
+      {error && (
+        <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+          <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>{error.toUpperCase()}</span>
+        </div>
+      )}
+      <div style={{ display: 'grid', gridTemplateColumns: narrow ? '1fr' : 'repeat(2, 1fr)', gap: '0.75rem' }}>
+        {ship.systems.map((system) => (
+          <SystemCard
+            key={system.id}
+            system={system}
+            resources={resources}
+            parts={parts}
+            busy={busy}
+            researchedSlugs={researchedSlugs}
+            armedType={armed !== null && armed.systemId === system.id ? armed.type : null}
+            onArm={arm}
+          />
+        ))}
+      </div>
+    </div>
+  )
+}
+
+function SystemCard({
+  system,
+  resources,
+  parts,
+  busy,
+  researchedSlugs,
+  armedType,
+  onArm,
+}: {
+  system: ShipSystemDto
+  resources: number
+  parts: number
+  busy: boolean
+  researchedSlugs: Set<string>
+  armedType: TaskType | null // #44 — which of this card's actions is the armed target
+  onArm: (type: TaskType, url: string, body: Record<string, unknown>, systemId: number) => void
+}) {
+  const maxLevel = effectiveLevelCap(system.type, researchedSlugs)
+  const maxCapacity = effectiveCapacityCap(system.type, researchedSlugs)
+  const gate = buildGate(system.type, researchedSlugs) // name of the required tech, or null when ungated/researched
+
+  const upgradeDisabled = busy || !system.built || system.level >= maxLevel || resources < upgradeCost(system.level)
+  const expandDisabled = busy || !system.built || system.capacity >= maxCapacity || resources < expandCost(system.capacity)
+  const buildDisabled = busy || system.built || gate !== null || parts < BUILD_PART_COST
+
+  return (
+    <Card>
+      <CardHeader>
+        <div style={{ display: 'flex', alignItems: 'center' }}>
+          <CardTitle>{system.type}</CardTitle>
+          <Badge variant={system.built ? 'ACTIVE' : 'OFFLINE'} className="ml-auto">
+            {system.built ? `LV ${system.level}` : 'OFFLINE'}
+          </Badge>
+        </div>
+      </CardHeader>
+      <CardContent>
+        <p style={{ fontSize: '0.65rem', color: 'var(--text-secondary)', letterSpacing: '0.08em' }}>
+          {system.built ? `LEVEL ${system.level} · CAPACITY ${system.capacity}` : 'NOT INSTALLED'}
+        </p>
+        <p style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>
+          {system.built
+            ? `UPGRADE ${upgradeCost(system.level)}× RES · EXPAND ${expandCost(system.capacity)}× RES`
+            : `BUILD ${BUILD_PART_COST}× PARTS`}
+        </p>
+        {!system.built && gate !== null && (
+          <p style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>REQUIRES // {gate}</p>
+        )}
+      </CardContent>
+      <CardFooter className="gap-2">
+        {system.built ? (
+          <>
+            <Button
+              variant="OUTLINE"
+              size="SM"
+              disabled={upgradeDisabled}
+              onClick={() => onArm('SHIP_UPGRADE', '/api/ship/upgrade', { systemId: system.id }, system.id)}
+            >
+              {armedType === 'SHIP_UPGRADE' ? 'PICK TEAM' : 'UPGRADE'}
+            </Button>
+            <Button
+              variant="OUTLINE"
+              size="SM"
+              disabled={expandDisabled}
+              onClick={() => onArm('SHIP_EXPAND', '/api/ship/expand', { systemId: system.id }, system.id)}
+            >
+              {armedType === 'SHIP_EXPAND' ? 'PICK TEAM' : 'EXPAND'}
+            </Button>
+          </>
+        ) : (
+          <Button
+            variant="OUTLINE"
+            size="SM"
+            disabled={buildDisabled}
+            onClick={() => onArm('SHIP_BUILD', '/api/ship/build', { type: system.type }, system.id)}
+          >
+            {armedType === 'SHIP_BUILD' ? 'PICK TEAM' : 'BUILD NEW'}
+          </Button>
+        )}
+      </CardFooter>
+    </Card>
+  )
+}

components/skill-tree.tsx

@@ -0,0 +1,152 @@
+'use client'
+
+import { useCallback, useEffect, useState } from 'react'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import { Card, CardContent, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
+import { TeamBuilder } from '@/components/team-builder'
+import { totalQty } from '@/lib/game/ship-costs'
+import type { ShipState } from '@/lib/game/ship'
+import type { CrewState } from '@/lib/game/save'
+import type { TechDto } from '@/lib/game/tech'
+
+// SKILL TREE tab — live data. The parent (MissionControl) owns the tech state + ship state; this panel
+// applies each research response directly via onResearched (no polling). A card's RESEARCH button ARMS
+// the tech (#44): the crew team builder mounts at the top of the column and its DISPATCH POSTs
+// /api/research with the team. The button is enabled only when the tech is AVAILABLE and its cost is
+// payable from the cargo hold, mirroring what POST /api/research enforces.
+
+interface SkillTreePanelProps {
+  techs: TechDto[] | null
+  ship: ShipState | null
+  narrow?: boolean
+  onResearched: (next: TechDto[]) => void
+}
+
+export function SkillTreePanel({ techs, ship, narrow, onResearched }: SkillTreePanelProps) {
+  const [error, setError] = useState<string | null>(null)
+  const [busy, setBusy] = useState(false) // one action at a time — turn-based game
+  // #44 — the armed tech (last-clicked AVAILABLE card); the builder above the grid picks the
+  // team and its DISPATCH performs the research.
+  const [armedTechId, setArmedTechId] = useState<number | null>(null)
+  const [crew, setCrew] = useState<CrewState | null>(null)
+
+  // JC-14 — the roster + queue the builder mirrors: fetched on mount and after every
+  // successful dispatch (the research response updates the tech state, not the roster).
+  // Keep-old-on-failure, the house .catch(() => {}) pattern.
+  const fetchCrew = useCallback(() => {
+    fetch('/api/crew')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as CrewState
+      })
+      .then((c) => setCrew(c))
+      .catch(() => {})
+  }, [])
+
+  useEffect(() => {
+    fetchCrew()
+  }, [fetchCrew])
+
+  if (!techs || !ship) {
+    return (
+      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING SKILL TREE…</span>
+      </div>
+    )
+  }
+
+  const resources = totalQty(ship.inventory, 'resource')
+  const parts = totalQty(ship.inventory, 'part')
+
+  async function research(tech: TechDto, leadCrewId: number, helperCrewIds: number[]) {
+    setBusy(true)
+    setError(null)
+    setArmedTechId(null)
+    try {
+      const res = await fetch('/api/research', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ techId: tech.id, leadCrewId, helperCrewIds }) })
+      const data = (await res.json()) as TechDto[] & { error?: string }
+      if (!res.ok) throw new Error(data.error ?? `HTTP ${res.status}`)
+      onResearched(data) // response is the fresh tech tree state — apply directly
+      fetchCrew() // JC-14 — the dispatch committed a team; refresh the roster + queue for the builder
+    } catch (err: unknown) {
+      setError(err instanceof Error ? err.message : String(err))
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  return (
+    <div style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem' }}>
+      {/* #44 — the armed tech's crew picker (JC-13: mounted only while a tech is armed);
+          its DISPATCH performs the research with the picked team. */}
+      {armedTechId !== null && crew !== null && (
+        <TeamBuilder
+          type="RESEARCH"
+          roster={crew.crew}
+          tasks={crew.tasks}
+          onQueue={(leadCrewId, helperCrewIds) => {
+            const tech = techs.find((t) => t.id === armedTechId)
+            if (tech) void research(tech, leadCrewId, helperCrewIds)
+          }}
+        />
+      )}
+      {error && (
+        <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
+          <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>{error.toUpperCase()}</span>
+        </div>
+      )}
+      <div style={{ display: 'grid', gridTemplateColumns: narrow ? '1fr' : 'repeat(2, 1fr)', gap: '0.75rem' }}>
+        {techs.map((tech) => (
+          <TechCard key={tech.slug} tech={tech} resources={resources} parts={parts} busy={busy} armed={armedTechId === tech.id} onArm={(t) => setArmedTechId(armedTechId === t.id ? null : t.id)} />
+        ))}
+      </div>
+    </div>
+  )
+}
+
+function TechCard({
+  tech,
+  resources,
+  parts,
+  busy,
+  armed,
+  onArm,
+}: {
+  tech: TechDto
+  resources: number
+  parts: number
+  busy: boolean
+  armed: boolean // #44 — this card's tech is the armed target (the builder is open for it)
+  onArm: (tech: TechDto) => void
+}) {
+  const affordable = tech.costKind === 'resource' ? resources >= tech.costQty : parts >= tech.costQty
+  const researchDisabled = busy || tech.state !== 'AVAILABLE' || !affordable
+
+  return (
+    <Card>
+      <CardHeader>
+        <div style={{ display: 'flex', alignItems: 'center' }}>
+          <CardTitle>{tech.name}</CardTitle>
+          <Badge variant={tech.state === 'RESEARCHED' ? 'ACTIVE' : tech.state === 'AVAILABLE' ? 'SCANNING' : 'OFFLINE'} className="ml-auto">
+            {tech.state}
+          </Badge>
+        </div>
+      </CardHeader>
+      <CardContent>
+        <p style={{ fontSize: '0.65rem', color: 'var(--text-secondary)', letterSpacing: '0.08em' }}>
+          COST {tech.costQty}× {tech.costKind === 'resource' ? 'RESOURCES' : 'PARTS'}
+        </p>
+        <p style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>UNLOCKS // {tech.effect}</p>
+        {tech.state === 'LOCKED' && (
+          <p style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>REQUIRES // {tech.missingPrereqs.join(' + ')}</p>
+        )}
+      </CardContent>
+      <CardFooter>
+        <Button variant="OUTLINE" size="SM" disabled={researchDisabled} onClick={() => onArm(tech)}>
+          {armed ? 'PICK TEAM' : 'RESEARCH'}
+        </Button>
+      </CardFooter>
+    </Card>
+  )
+}

components/task-strip.tsx

@@ -0,0 +1,54 @@
+'use client'
+
+import type { QueueDto } from '@/lib/game/save'
+
+// TASK STRIP — the save's task queue, fixed bottom-left next to the NEXT TURN button (#44).
+// The array arrives pre-ordered from the snapshot builder (Task 6: ACTIVE block, then PENDING
+// block, each by (queuedAtTurn, id)) — the strip renders it as-is, dimming the PENDING rows,
+// and never fetches or re-sorts. Empty queue → null, no box at all. The shell re-renders it on
+// every refreshAll (Task 7) — a pure display of the array it is handed.
+
+export function TaskStrip({ tasks }: { tasks: QueueDto[] }) {
+  if (tasks.length === 0) return null
+
+  return (
+    <div
+      style={{
+        position: 'fixed',
+        left: '1rem',
+        bottom: '1rem',
+        zIndex: 60, // above the header/footer's 50
+        background: 'var(--surface)',
+        border: '1px solid var(--border)',
+        padding: '0.5rem 0.75rem',
+        maxWidth: '26rem',
+      }}
+    >
+      <span style={{ display: 'block', fontSize: '0.6rem', color: 'var(--text-muted)', letterSpacing: '0.12em', marginBottom: '0.3rem' }}>
+        ACTIVE TASKS
+      </span>
+      {tasks.map((t) => (
+        <div
+          key={t.id}
+          style={{
+            display: 'flex',
+            justifyContent: 'space-between',
+            gap: '0.75rem',
+            padding: '0.2rem 0',
+            opacity: t.status === 'PENDING' ? 0.45 : 1, // dim, don't reorder — the array is the order
+          }}
+        >
+          <span style={{ fontSize: '0.62rem', color: 'var(--text-secondary)', letterSpacing: '0.06em' }}>
+            {t.type} // {t.targetLabel}
+          </span>
+          <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.04em', whiteSpace: 'nowrap' }}>
+            {t.leadName}
+            {t.helperNames.length > 0 ? ` +${t.helperNames.join(' +')}` : ''}
+            {' — '}
+            {t.status === 'ACTIVE' ? `${t.remaining} turn(s) left` : 'queued'}
+          </span>
+        </div>
+      ))}
+    </div>
+  )
+}

components/team-builder.tsx

@@ -0,0 +1,87 @@
+'use client'
+
+import { useState } from 'react'
+import { Button } from '@/components/ui/button'
+import type { CrewDto, QueueDto } from '@/lib/game/save'
+import { computeDuration, type TaskType } from '@/lib/game/tasks'
+
+// Shared crew picker for the four action panels — PR A: an action is queued as a lead +
+// helpers task, not a one-click. Self-contained: the panel passes the /api/crew CrewState
+// it fetched (roster + queue, Task 6) and onQueue hands back the picked team; the panel
+// performs its own fetch with the team fields in the body (Task 5a). The live preview is
+// Task 1's computeDuration (pure, no DB import) with the default powerOf — the same call
+// 5a's route makes, so it equals the stored duration. The rows mirror Task 3's queueTask
+// so the UI never offers a 409 (JC-11's fields make the member↔row check exact).
+export function TeamBuilder({ type, hopCount, roster, tasks, onQueue }: {
+  type: TaskType
+  hopCount?: number
+  roster: CrewDto[]
+  tasks: QueueDto[]
+  onQueue: (leadCrewId: number, helperCrewIds: number[]) => void
+}) {
+  const [leadId, setLeadId] = useState<number | null>(null)
+  const [helperIds, setHelperIds] = useState<number[]>([])
+
+  // Whole-builder blocks: an ACTIVE jump is in transit (all types); in the jump panel any
+  // queued jump is — the second-jump 409 (JC-12). The JUMP branch coalesces find()'s
+  // undefined to null so blocked is strictly QueueDto | null: the roster ternary below tests
+  // truthiness, but the button guard compares to null — undefined slipped past it and
+  // disabled every empty-queue JUMP dispatch (v0.10.1 e2e jump regression).
+  const inTransit = tasks.find((t) => t.type === 'JUMP' && t.status === 'ACTIVE')
+  const queuedJump = type === 'JUMP' ? (tasks.find((t) => t.type === 'JUMP') ?? null) : null
+  const blocked = inTransit ?? queuedJump
+
+  const lead = roster.find((c) => c.id === leadId) ?? null
+  const helpers = roster.filter((c) => helperIds.includes(c.id))
+  const duration = lead ? computeDuration(type, hopCount ?? 0, lead, helpers) : null // CrewDto ⊇ CrewMember
+
+  const leadReason = (c: CrewDto) => {
+    const leads = tasks.find((x) => x.leadCrewId === c.id && x.status === 'PENDING')
+    if (leads) return `${leads.type} ALREADY QUEUED`
+    const helps = tasks.find((x) => x.helperCrewIds.includes(c.id) && x.status === 'PENDING')
+    return helps ? `COMMITTED: ${helps.type}` : null
+  }
+  const helperReason = (c: CrewDto) => {
+    const t = tasks.find((x) => (x.leadCrewId === c.id || x.helperCrewIds.includes(c.id)) && (x.status === 'ACTIVE' || x.status === 'PENDING'))
+    return t ? `BUSY: ${t.type}` : null
+  }
+
+  return (
+    <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem', display: 'flex', flexDirection: 'column', gap: '0.5rem' }}>
+      <span style={{ fontSize: '0.6rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>PICK TEAM // {type}</span>
+      {blocked ? (
+        <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>
+          {inTransit ? `IN TRANSIT // ${inTransit.targetLabel}` : 'A JUMP IS ALREADY QUEUED'}
+        </span>
+      ) : (
+        roster.map((c) => (
+          <label key={c.id} style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
+            <input
+              type="radio"
+              name="lead"
+              checked={leadId === c.id}
+              disabled={leadReason(c) !== null}
+              onChange={() => {
+                setLeadId(c.id)
+                setHelperIds((h) => h.filter((x) => x !== c.id)) // a lead is never also a helper of the same task
+              }}
+            />
+            <input type="checkbox" checked={helperIds.includes(c.id)} disabled={leadId === c.id || helperReason(c) !== null} onChange={() => setHelperIds((h) => (h.includes(c.id) ? h.filter((x) => x !== c.id) : [...h, c.id]))} />
+            <span style={{ fontSize: '0.65rem', color: leadId === c.id ? 'var(--text-secondary)' : 'var(--text-muted)', letterSpacing: '0.08em' }}>
+              {c.name}
+              {leadId === c.id ? ' // LEAD' : ''} {leadReason(c) ?? helperReason(c) ?? ''}
+            </span>
+          </label>
+        ))
+      )}
+      <div style={{ display: 'flex', alignItems: 'center', gap: '0.75rem' }}>
+        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>
+          {duration !== null ? `WILL TAKE ${duration} TURN(S)` : 'PICK A LEAD'}
+        </span>
+        <Button variant="EXEC" size="SM" className="ml-auto" disabled={!lead || blocked !== null || leadReason(lead) !== null} onClick={() => lead && onQueue(lead.id, helperIds)}>
+          DISPATCH
+        </Button>
+      </div>
+    </div>
+  )
+}

components/ui/node-graph.tsx

@@ -1,299 +0,0 @@
-'use client'
-
-import * as React from 'react'
-import { cn } from '@/lib/utils'
-
-export type NodeGraphVariant = 'DEFAULT' | 'ACTIVE' | 'WARNING' | 'CRITICAL'
-export type NodeStatus = 'ACTIVE' | 'OFFLINE' | 'WARNING' | 'CRITICAL' | 'NEUTRAL'
-
-export interface NodeGraphNode {
-  id: string
-  label: string
-  x: number       // 0–100 coordinate space
-  y: number
-  status?: NodeStatus
-  sublabel?: string
-}
-
-export interface NodeGraphEdge {
-  from: string
-  to: string
-  label?: string
-  animated?: boolean
-}
-
-export interface NodeGraphProps extends React.HTMLAttributes<HTMLDivElement> {
-  nodes: NodeGraphNode[]
-  edges: NodeGraphEdge[]
-  variant?: NodeGraphVariant
-  title?: string
-  height?: number
-  directed?: boolean
-}
-
-const VARIANT_COLORS: Record<NodeGraphVariant, string> = {
-  DEFAULT:  'var(--text-secondary)',
-  ACTIVE:   'var(--color-green)',
-  WARNING:  'var(--color-amber)',
-  CRITICAL: 'var(--color-red)',
-}
-
-const STATUS_COLOR: Record<NodeStatus, string> = {
-  ACTIVE:   'var(--color-green)',
-  OFFLINE:  'var(--border)',
-  WARNING:  'var(--color-amber)',
-  CRITICAL: 'var(--color-red)',
-  NEUTRAL:  'var(--text-muted)',
-}
-
-const NODE_W = 100
-const NODE_H = 36
-
-const NodeGraph = React.forwardRef<HTMLDivElement, NodeGraphProps>(
-  (
-    {
-      className,
-      nodes,
-      edges,
-      variant  = 'ACTIVE',
-      title,
-      height   = 320,
-      directed = false,
-      style,
-      ...props
-    },
-    ref
-  ) => {
-    const containerRef = React.useRef<HTMLDivElement>(null)
-    const [svgW, setSvgW] = React.useState(600)
-    const [hovered, setHovered] = React.useState<string | null>(null)
-
-    React.useEffect(() => {
-      if (!containerRef.current) return
-      const ro = new ResizeObserver(entries => {
-        setSvgW(entries[0].contentRect.width)
-      })
-      ro.observe(containerRef.current)
-      return () => ro.disconnect()
-    }, [])
-
-    const color = VARIANT_COLORS[variant]
-    const markerId = `arrow-${variant}`
-
-    function nodePx(node: NodeGraphNode) {
-      return (node.x / 100) * svgW
-    }
-
-    function nodePy(node: NodeGraphNode) {
-      return (node.y / 100) * height
-    }
-
-    function edgeEndpoints(fromNode: NodeGraphNode, toNode: NodeGraphNode) {
-      const fx = nodePx(fromNode)
-      const fy = nodePy(fromNode)
-      const tx = nodePx(toNode)
-      const ty = nodePy(toNode)
-      const dx = tx - fx
-      const dy = ty - fy
-      const dist = Math.sqrt(dx * dx + dy * dy)
-      if (dist < 1) return { x1: fx, y1: fy, x2: tx, y2: ty }
-
-      const ux = dx / dist
-      const uy = dy / dist
-      const hw = NODE_W / 2
-      const hh = NODE_H / 2
-
-      const tW = Math.abs(ux) > 0.001 ? hw / Math.abs(ux) : Infinity
-      const tH = Math.abs(uy) > 0.001 ? hh / Math.abs(uy) : Infinity
-      const t  = Math.min(tW, tH)
-
-      return {
-        x1: fx + ux * t,
-        y1: fy + uy * t,
-        x2: tx - ux * t,
-        y2: ty - uy * t,
-      }
-    }
-
-    const nodeMap = new Map(nodes.map(n => [n.id, n]))
-    const hasAnimatedEdge = edges.some(e => e.animated)
-
-    return (
-      <div
-        ref={ref}
-        className={cn(className)}
-        style={{
-          border:     '1px solid var(--border)',
-          background: 'var(--surface)',
-          fontFamily: 'var(--font-mono)',
-          overflow:   'hidden',
-          ...style,
-        }}
-        {...props}
-      >
-        {title && (
-          <div
-            style={{
-              padding:       '0.4rem 0.75rem',
-              borderBottom:  '1px solid var(--border)',
-              background:    'var(--surface-raised)',
-              fontSize:      '0.6rem',
-              color:         'var(--text-muted)',
-              letterSpacing: '0.12em',
-              textTransform: 'uppercase',
-            }}
-          >
-            {title}
-          </div>
-        )}
-
-        <div ref={containerRef} style={{ width: '100%', height: `${height}px` }}>
-          <svg width={svgW} height={height} style={{ display: 'block' }}>
-            <defs>
-              {directed && (
-                <marker
-                  id={markerId}
-                  markerWidth="6"
-                  markerHeight="6"
-                  refX="6"
-                  refY="3"
-                  orient="auto"
-                >
-                  <path d="M 0 0 L 6 3 L 0 6 Z" fill={color} />
-                </marker>
-              )}
-            </defs>
-
-            {hasAnimatedEdge && (
-              <style>{`
-                @keyframes nodeGraphDash { to { stroke-dashoffset: -8; } }
-              `}</style>
-            )}
-
-            {/* Edges */}
-            {edges.map((edge, ei) => {
-              const fromNode = nodeMap.get(edge.from)
-              const toNode   = nodeMap.get(edge.to)
-              if (!fromNode || !toNode) return null
-
-              const { x1, y1, x2, y2 } = edgeEndpoints(fromNode, toNode)
-              const mx = (x1 + x2) / 2
-              const my = (y1 + y2) / 2
-
-              return (
-                <g key={ei}>
-                  <line
-                    x1={x1.toFixed(1)}
-                    y1={y1.toFixed(1)}
-                    x2={x2.toFixed(1)}
-                    y2={y2.toFixed(1)}
-                    stroke={color}
-                    strokeWidth={1}
-                    opacity={0.5}
-                    strokeDasharray={edge.animated ? '4 4' : undefined}
-                    markerEnd={directed ? `url(#${markerId})` : undefined}
-                    style={edge.animated
-                      ? { animation: 'nodeGraphDash 0.5s linear infinite' }
-                      : undefined}
-                  />
-                  {edge.label && (
-                    <text
-                      x={mx.toFixed(1)}
-                      y={my.toFixed(1)}
-                      textAnchor="middle"
-                      dominantBaseline="middle"
-                      fontSize={8}
-                      fill="var(--text-muted)"
-                      fontFamily="var(--font-mono)"
-                    >
-                      {edge.label}
-                    </text>
-                  )}
-                </g>
-              )
-            })}
-
-            {/* Nodes */}
-            {nodes.map(node => {
-              const cx = nodePx(node)
-              const cy = nodePy(node)
-              const isHovered   = hovered === node.id
-              const statusColor = node.status ? STATUS_COLOR[node.status] : color
-
-              return (
-                <g
-                  key={node.id}
-                  onMouseEnter={() => setHovered(node.id)}
-                  onMouseLeave={() => setHovered(null)}
-                  style={{ cursor: 'default' }}
-                >
-                  {/* Background */}
-                  <rect
-                    x={(cx - NODE_W / 2).toFixed(1)}
-                    y={(cy - NODE_H / 2).toFixed(1)}
-                    width={NODE_W}
-                    height={NODE_H}
-                    fill="var(--surface-raised)"
-                  />
-                  {/* Hover tint */}
-                  {isHovered && (
-                    <rect
-                      x={(cx - NODE_W / 2).toFixed(1)}
-                      y={(cy - NODE_H / 2).toFixed(1)}
-                      width={NODE_W}
-                      height={NODE_H}
-                      fill={statusColor}
-                      fillOpacity={0.12}
-                    />
-                  )}
-                  {/* Border */}
-                  <rect
-                    x={(cx - NODE_W / 2).toFixed(1)}
-                    y={(cy - NODE_H / 2).toFixed(1)}
-                    width={NODE_W}
-                    height={NODE_H}
-                    fill="none"
-                    stroke={statusColor}
-                    strokeWidth={isHovered ? 1.5 : 1}
-                  />
-
-                  {/* Label */}
-                  <text
-                    x={cx.toFixed(1)}
-                    y={(node.sublabel ? cy - 5 : cy).toFixed(1)}
-                    textAnchor="middle"
-                    dominantBaseline="middle"
-                    fontSize={10}
-                    fill={statusColor}
-                    fontFamily="var(--font-mono)"
-                    fontWeight="600"
-                  >
-                    {node.label.toUpperCase()}
-                  </text>
-
-                  {/* Sublabel */}
-                  {node.sublabel && (
-                    <text
-                      x={cx.toFixed(1)}
-                      y={(cy + 8).toFixed(1)}
-                      textAnchor="middle"
-                      dominantBaseline="middle"
-                      fontSize={8}
-                      fill="var(--text-muted)"
-                      fontFamily="var(--font-mono)"
-                    >
-                      {node.sublabel}
-                    </text>
-                  )}
-                </g>
-              )
-            })}
-          </svg>
-        </div>
-      </div>
-    )
-  }
-)
-NodeGraph.displayName = 'NodeGraph'
-
-export { NodeGraph }

components/world-map.tsx

@@ -1,23 +1,66 @@
 'use client'
 
-import { useCallback, useEffect, useState } from 'react'
-import { Button } from '@/components/ui/button'
-import { NodeGraph } from '@/components/ui/node-graph'
-import type { WorldState } from '@/lib/game/save'
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { forceCenter, forceCollide, forceLink, forceManyBody, forceSimulation } from 'd3-force'
+import type { SimulationNodeDatum } from 'd3-force'
+import { select } from 'd3-selection'
+import { zoom, zoomIdentity } from 'd3-zoom'
+import { TeamBuilder } from '@/components/team-builder'
+import type { CrewState, WorldState } from '@/lib/game/save'
+import { reachableWithin } from '@/lib/game/world'
 
-// WORLD MAP tab — the first live game panel: renders real world state from /api/world and
-// offers a jump button per system adjacent to the current one (NodeGraph nodes are not
-// clickable upstream, so the affordance lives in this list). Turn-based: fetch on mount,
-// refetch via the jump response — no polling.
+// WORLD MAP tab — real world state from /api/world on a force-directed chart (d3-force) with
+// pan + zoom (d3-zoom), per #28. Clicking a system within jump range of the current one ARMS
+// it (#44): the crew team builder mounts as a floating card over the chart, and its DISPATCH
+// POSTs /api/jump with the team in the body (two hops away once NAVIGATION AI is researched,
+// #35); the current and unreachable systems are dimmed and not
+// clickable, and every node is locked while a jump is in flight. Turn-based: fetch on mount,
+// refetch via the jump response — no polling. In wide mode (#36) the chart fills the whole tab
+// pane (no internal scrollbar); narrow keeps a fixed fallback height since the page scrolls naturally there.
 
 interface WorldMapPanelProps {
-  height?: number
+  height?: number // fallback chart height when the pane gives no definite space (narrow mode)
+  narrow?: boolean
+  navAi?: boolean // #35 — NAVIGATION AI researched: two-hop systems are jumpable fields too
+  onJumped?: () => void // #30 — let the parent refresh /api/system after a successful jump
 }
 
-export function WorldMapPanel({ height = 380 }: WorldMapPanelProps) {
+type NodeStatus = 'current' | 'jumpable' | 'offline'
+
+// d3-force mutates these in place; the whole scene is rebuilt from scratch on every world change.
+interface ChartNode extends SimulationNodeDatum {
+  id: number
+  name: string // already uppercased — doubles as the accessible label
+  status: NodeStatus
+  sublabel: string
+}
+
+// forceLink replaces the numeric ids with node references once initialized.
+interface ChartLink {
+  source: number | ChartNode
+  target: number | ChartNode
+}
+
+const NODE_W = 100
+const NODE_H = 36
+
+// Palette carried over from the old hand-rolled chart.
+const STATUS_COLOR: Record<NodeStatus, string> = {
+  current: 'var(--color-green)',
+  jumpable: 'var(--text-muted)',
+  offline: 'var(--border)',
+}
+
+export function WorldMapPanel({ height = 380, narrow = false, navAi = false, onJumped }: WorldMapPanelProps) {
+  // Wide mode: the flex chain (Tabs → TabsContent → this panel) provides a definite pane size to fill (#36).
+  const filling = !narrow
   const [world, setWorld] = useState<WorldState | null>(null)
   const [error, setError] = useState<string | null>(null)
   const [jumpingId, setJumpingId] = useState<number | null>(null)
+  // #44 — the team builder: the clicked node is the armed target; its DISPATCH performs the jump.
+  const [crew, setCrew] = useState<CrewState | null>(null)
+  const [armedId, setArmedId] = useState<number | null>(null)
+  const containerRef = useRef<HTMLDivElement>(null)
 
   useEffect(() => {
     let cancelled = false
@@ -37,23 +80,211 @@ export function WorldMapPanel({ height = 380 }: WorldMapPanelProps) {
     }
   }, [])
 
-  const jump = useCallback(async (systemId: number) => {
+  // JC-14 — the roster + queue the builder mirrors: fetched on mount and after every
+  // successful dispatch (the jump response updates the world state, not the roster).
+  // Keep-old-on-failure, the house .catch(() => {}) pattern.
+  const fetchCrew = useCallback(() => {
+    fetch('/api/crew')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`)
+        return (await res.json()) as CrewState
+      })
+      .then((c) => setCrew(c))
+      .catch(() => {})
+  }, [])
+
+  useEffect(() => {
+    fetchCrew()
+  }, [fetchCrew])
+
+  // #35 — the jump-reach map: one hop away, or two once NAVIGATION AI is researched. The chart
+  // marks its fields clickable from it, and the team builder previews the armed target's
+  // duration from its hop count (the same logic /api/jump recomputes).
+  const hopMap = useMemo(() => {
+    if (!world) return null
+    const current = world.systems.find((s) => s.current)
+    return current ? reachableWithin(world.edges, current.id, navAi ? 2 : 1) : null
+  }, [world, navAi])
+
+  // Ref guard so a double-click can't start two jumps before the re-render locks the nodes.
+  const jumpingRef = useRef(false)
+
+  // #44 — a node click ARMS the target instead of jumping: the builder over the chart picks the
+  // team, and its DISPATCH performs the fetch (below). Clicking another jumpable node retargets.
+  const arm = useCallback((systemId: number) => {
+    if (jumpingRef.current) return
+    setArmedId(systemId)
+  }, [])
+
+  const jump = useCallback(async (systemId: number, leadCrewId: number, helperCrewIds: number[]) => {
+    if (jumpingRef.current) return
+    jumpingRef.current = true
     setJumpingId(systemId)
+    setArmedId(null)
     try {
       const res = await fetch('/api/jump', {
         method: 'POST',
         headers: { 'content-type': 'application/json' },
-        body: JSON.stringify({ systemId }),
+        body: JSON.stringify({ systemId, leadCrewId, helperCrewIds }),
       })
       const body = (await res.json()) as WorldState & { error?: string }
       if (!res.ok) throw new Error(body.error ?? `HTTP ${res.status}`)
       setWorld(body) // fresh state straight from the response — no refetch needed
+      onJumped?.() // #30 — parent re-fetches /api/system (LOCAL SYSTEM + CARGO HOLD mirror it)
+      fetchCrew() // JC-14 — the dispatch committed a team; refresh the roster + queue for the builder
     } catch (err: unknown) {
       setError(err instanceof Error ? err.message : String(err))
     } finally {
+      jumpingRef.current = false
       setJumpingId(null)
     }
-  }, [])
+  }, [onJumped, fetchCrew])
+
+  // Rebuild the chart on every world/lock change — the force layout re-settles from the API's
+  // coordinates, so nodes visibly rearrange after each jump (#28).
+  useEffect(() => {
+    const container = containerRef.current
+    if (!container || !world || !hopMap) return
+
+    // Measured pane size (#36): the flex chain gives a definite box in wide mode; `height` is the
+    // fallback when the container has no resolved size yet (narrow flow, or tab hidden on load).
+    const W = container.clientWidth || 800
+    const H = container.clientHeight || height
+
+    const nodes: ChartNode[] = world.systems.map((s) => ({
+      id: s.id,
+      name: s.name.toUpperCase(),
+      status: s.current ? 'current' : hopMap.has(s.id) ? 'jumpable' : 'offline',
+      sublabel: s.current
+        ? 'CURRENT'
+        : hopMap.has(s.id)
+          ? `${s.discovered ? 'DISCOVERED' : 'UNKNOWN'} // JUMP${(hopMap.get(s.id) ?? 1) > 1 ? ' ×2' : ''}`
+          : s.discovered ? 'DISCOVERED' : 'UNKNOWN',
+      x: (s.x / 100) * W, // seed from the API coordinates so the layout settles near the old chart
+      y: (s.y / 100) * H,
+    }))
+    const links: ChartLink[] = world.edges.map(([a, b]) => ({ source: a, target: b }))
+
+    // width/height 100% + fixed viewBox: the scene scales with the pane on window resizes without
+    // rebuilding (pan/zoom stay accurate — d3 maps pointers through the SVG transform matrix).
+    const svg = select(container)
+      .append('svg')
+      .attr('width', '100%')
+      .attr('height', '100%')
+      .attr('viewBox', `0 0 ${W} ${H}`)
+      .style('display', 'block')
+
+    const root = svg.append('g')
+    const edgeLayer = root.append('g')
+    const nodeLayer = root.append('g')
+
+    // Pan + zoom (#28): wheel/drag on the chart, transform applied to the scene root. d3-zoom does
+    // NOT swallow the trailing click after a drag, so track real pans and ignore node clicks that
+    // end one (mousedown on a node, tiny drag, release over the same node).
+    let panned = false
+    const zoomBehavior = zoom<SVGSVGElement, unknown>()
+      .scaleExtent([0.15, 5])
+      .on('start', () => {
+        panned = false
+      })
+      .on('zoom', (event) => {
+        root.attr('transform', event.transform.toString())
+        // Any user gesture (drag or trackpad pan); a clean click's own mousedown re-fires
+        // 'start' and resets this before its click lands. Programmatic fits have no sourceEvent.
+        if (event.sourceEvent) panned = true
+      })
+    svg.call(zoomBehavior)
+
+    // The settled force layout is bigger than the chart box for large saves, so once the
+    // simulation stops, zoom-to-fit: frame every node inside the container with padding.
+    const fitToNodes = () => {
+      let minX = Infinity
+      let minY = Infinity
+      let maxX = -Infinity
+      let maxY = -Infinity
+      for (const n of nodes) {
+        minX = Math.min(minX, (n.x ?? 0) - NODE_W / 2)
+        minY = Math.min(minY, (n.y ?? 0) - NODE_H / 2)
+        maxX = Math.max(maxX, (n.x ?? 0) + NODE_W / 2)
+        maxY = Math.max(maxY, (n.y ?? 0) + NODE_H / 2)
+      }
+      const pad = 16
+      const scale = Math.min(W / (maxX - minX + pad * 2), H / (maxY - minY + pad * 2))
+      const tx = W / 2 - scale * ((minX + maxX) / 2)
+      const ty = H / 2 - scale * ((minY + maxY) / 2)
+      svg.call(zoomBehavior.transform, zoomIdentity.translate(tx, ty).scale(scale))
+    }
+
+    const edgeSel = edgeLayer.selectAll('line').data(links).enter().append('line')
+      .attr('stroke', 'var(--color-green)')
+      .attr('stroke-width', 1)
+      .attr('opacity', 0.5)
+
+    const nodeSel = nodeLayer.selectAll<SVGGElement, ChartNode>('g').data(nodes).enter().append('g')
+
+    // Same accessible contract as the old chart: only jumpable nodes are role=button with their
+    // name as the accessible label (e2e clicks them by role/name); all locked while a jump is in flight.
+    // A click ARMS the node (#44) — the team builder over the chart performs the jump.
+    nodeSel.filter((d) => d.status === 'jumpable' && jumpingId === null)
+      .attr('role', 'button')
+      .attr('tabindex', 0)
+      .attr('aria-label', (d) => d.name)
+      .style('cursor', 'pointer')
+      .on('click', (event: MouseEvent, d) => {
+        if (!panned) arm(d.id) // a real pan ends with a click too — don't arm on that one
+      })
+      .on('keydown', (event: KeyboardEvent, d) => {
+        if (event.key === 'Enter' || event.key === ' ') {
+          event.preventDefault()
+          arm(d.id)
+        }
+      })
+
+    nodeSel.each(function (d) {
+      const g = select(this)
+      const color = STATUS_COLOR[d.status]
+      g.append('rect')
+        .attr('x', -NODE_W / 2).attr('y', -NODE_H / 2)
+        .attr('width', NODE_W).attr('height', NODE_H)
+        .attr('fill', 'var(--surface-raised)')
+      g.append('rect')
+        .attr('x', -NODE_W / 2).attr('y', -NODE_H / 2)
+        .attr('width', NODE_W).attr('height', NODE_H)
+        .attr('fill', 'none').attr('stroke', color).attr('stroke-width', 1)
+      g.append('text')
+        .attr('x', 0).attr('y', -5)
+        .attr('text-anchor', 'middle').attr('dominant-baseline', 'middle')
+        .attr('font-size', 10).attr('fill', color)
+        .style('font-family', 'var(--font-mono)').style('font-weight', '600')
+        .text(d.name)
+      g.append('text')
+        .attr('x', 0).attr('y', 8)
+        .attr('text-anchor', 'middle').attr('dominant-baseline', 'middle')
+        .attr('font-size', 8).attr('fill', 'var(--text-muted)')
+        .style('font-family', 'var(--font-mono)')
+        .text(d.sublabel)
+    })
+
+    const simulation = forceSimulation(nodes)
+      .force('link', forceLink<ChartNode, ChartLink>(links).id((d) => d.id).distance(130).strength(0.25))
+      .force('charge', forceManyBody().strength(-420))
+      .force('center', forceCenter(W / 2, H / 2))
+      .force('collide', forceCollide(60))
+      .on('end', fitToNodes)
+      .on('tick', () => {
+        edgeSel
+          .attr('x1', (d) => (d.source as ChartNode).x ?? 0)
+          .attr('y1', (d) => (d.source as ChartNode).y ?? 0)
+          .attr('x2', (d) => (d.target as ChartNode).x ?? 0)
+          .attr('y2', (d) => (d.target as ChartNode).y ?? 0)
+        nodeSel.attr('transform', (d) => `translate(${d.x ?? 0},${d.y ?? 0})`)
+      })
+
+    return () => {
+      simulation.stop()
+      svg.remove()
+    }
+  }, [world, jumpingId, arm, height, navAi, hopMap])
 
   if (error && !world) {
     return (
@@ -68,36 +299,26 @@ export function WorldMapPanel({ height = 380 }: WorldMapPanelProps) {
   if (!world) {
     return (
       <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
-        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>SCANNING CHART…</span>
+        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>SCANNING CHART…</span>
       </div>
     )
   }
 
-  const current = world.systems.find((s) => s.current)!
-  const reachable = world.edges
-    .filter(([a, b]) => a === current.id || b === current.id)
-    .map(([a, b]) => (a === current.id ? b : a))
-    .map((id) => world.systems.find((s) => s.id === id)!)
-
+  // flex (not height:'100%'): the pane chain is sized by min-height, where percentages don't resolve
   return (
-    <div style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem' }}>
-      <NodeGraph
-        nodes={world.systems.map((s) => ({
-          id: String(s.id),
-          label: s.name,
-          x: s.x,
-          y: s.y,
-          status: s.current ? 'ACTIVE' : s.discovered ? 'NEUTRAL' : 'OFFLINE',
-          sublabel: s.current ? 'CURRENT' : s.discovered ? 'DISCOVERED' : 'UNKNOWN',
-        }))}
-        edges={world.edges.map(([a, b]) => ({ from: String(a), to: String(b) }))}
-        variant="ACTIVE"
-        title={`GALACTIC CHART // JUMP ROUTES — TURN ${world.turn}`}
-        height={height}
-        style={{ width: '100%' }}
-      />
-
-      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', overflow: 'hidden' }}>
+    <div style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem', ...(filling ? { flex: 1, minHeight: 0 } : {}) }}>
+      {/* Wrapper + title bar; in wide mode the box flexes to fill the whole pane (#36). d3 owns the
+          chart container inside it; the armed target's team builder floats over the chart (#44). */}
+      <div
+        style={{
+          border: '1px solid var(--border)',
+          background: 'var(--surface)',
+          fontFamily: 'var(--font-mono)',
+          overflow: 'hidden',
+          position: 'relative',
+          ...(filling ? { flex: 1, minHeight: 0, display: 'flex', flexDirection: 'column' } : {}),
+        }}
+      >
         <div
           style={{
             padding: '0.4rem 0.75rem',
@@ -109,21 +330,32 @@ export function WorldMapPanel({ height = 380 }: WorldMapPanelProps) {
             textTransform: 'uppercase',
           }}
         >
-          JUMP ROUTES // FROM {current.name.toUpperCase()}
-        </div>
-        <div style={{ display: 'flex', flexWrap: 'wrap', gap: '0.5rem', padding: '0.6rem 0.75rem' }}>
-          {reachable.map((s) => (
-            <Button
-              key={s.id}
-              variant="OUTLINE"
-              size="SM"
-              disabled={jumpingId !== null}
-              onClick={() => void jump(s.id)}
-            >
-              {jumpingId === s.id ? 'JUMPING…' : `${s.name.toUpperCase()} // JUMP`}
-            </Button>
-          ))}
+          GALACTIC CHART // JUMP ROUTES — TURN {world.turn}
         </div>
+        <div ref={containerRef} style={{ width: '100%', ...(filling ? { flex: 1, minHeight: 0 } : { height: `${height}px` }) }} />
+
+        {/* #44 — the armed target's crew picker, floating over the chart (JC-13: mounted only
+            while a target is armed); its DISPATCH performs the jump with the picked team. */}
+        {armedId !== null && crew !== null && (
+          <div
+            style={{
+              position: 'absolute',
+              left: '50%',
+              top: '50%',
+              transform: 'translate(-50%, -50%)',
+              width: 'min(24rem, calc(100% - 1.5rem))',
+              zIndex: 10,
+            }}
+          >
+            <TeamBuilder
+              type="JUMP"
+              hopCount={hopMap?.get(armedId) ?? 0}
+              roster={crew.crew}
+              tasks={crew.tasks}
+              onQueue={(leadCrewId, helperCrewIds) => void jump(armedId, leadCrewId, helperCrewIds)}
+            />
+          </div>
+        )}
       </div>
 
       {error && (

docs/superpowers/specs/2026-10-01-crew-driven-actions-design.md

@@ -0,0 +1,121 @@
+# Crew-Driven Actions & Skill Progression — Design Spec
+
+- Date: 2026-10-01
+- Status: approved
+- Tracking: Gitea issues #43–#45 (created after spec approval)
+- Repo rules: AGENTS.md change process applies to every issue below
+
+## 1. Background
+
+SpaceWanderer is a single-player, turn-based space adventure (dungeon-crawler flavor; reference: Out There). As of v0.9.12 the loop is jump → scan planets → collect hauls → spend on ship upgrades & research → take missions for generic rewards. Every action resolves instantly and costs exactly 1 turn (jumps cost hop count, 1–2 with NAV AI tech). Crew members carry a role and two traits but change nothing mechanically — ORCHESTRATOR.md's "manage crew of flawed humans" is unimplemented.
+
+This iteration makes **crew the central resource**: every action requires an assigned team, takes variable duration based on that team's roles/skills/traits, and time advances only when the player presses NEXT TURN. Doing jobs builds skill levels, so crews specialise over a playthrough.
+
+## 2. Goals / Non-goals
+
+Goals:
+1. Every game action (jump, explore, ship work, research) becomes a queued task with an assigned team (lead + optional helpers).
+2. Duration is computed from work points ÷ team power, modified by role mismatch and the lead's traits — min 1 turn.
+3. Manual time: NEXT TURN button (bottom-right) advances exactly 1 turn; empty queue = free skip.
+4. Skill progression: 4 skills keyed by action type; XP from completed tasks; levels 0–5 with power bands; role-based starting specialisation; titles at L3/L5.
+5. All 20 traits get mechanical meaning (duration modifiers now; two outcome effects in #43; three combat traits marked STANDBY for the future encounters iteration).
+
+Non-goals (explicitly out of scope):
+- Random encounters, combat, damage, death (next roadmap item per ORCHESTRATOR.md §7)
+- Real-time mode — but the work-point model is time-independent by design to ease that migration later
+- Crew injury/departure, supplies/hunger systems, task cancellation
+
+## 3. Core Model: Queued Tasks + Turn Tick
+
+- New `tasks` table (schema v7): one row per queued/active task. Fields: id, saveId, type (`JUMP|EXPLORE|SHIP_UPGRADE|SHIP_EXPAND|SHIP_BUILD|RESEARCH`), payload (JSON — targetSystemId / planetId / systemType+action / techSlug), leadCrewId, helpers (JSON array of crew ids), duration, remaining, status (`ACTIVE|PENDING|DONE`).
+- **One active task per crew member** (as lead or helper). A crew member may hold a chain of PENDING tasks (FIFO pre-queueing); when their current task completes on a turn tick, the next pending auto-starts. Helper slots are fixed at queue time; a committed helper is busy for that task's duration and cannot be added elsewhere meanwhile.
+- **Costs deduct at queue time** (ship work & research consume resources/parts immediately — prevents mid-turn affordability races); effects apply on completion. Jumps/explores have no resource cost.
+- `save.turn` increments only via `POST /api/turn`. The tick: for every ACTIVE task, remaining−=1; tasks reaching 0 resolve (per-type resolvers reusing existing logic from save.ts / ship / research), grant XP (§6), write events, free the team, auto-start any FIFO successor, then run mission-completion checks for what just resolved.
+- **In-transit rule:** while any JUMP task is ACTIVE, no new tasks can be queued (409). Pending jumps do not block; already-active/pending non-jump work continues through the jump and resolves against its target regardless of current system location. Only one JUMP may exist at a time (active or pending) — prevents two arrivals on one tick.
+- **Mission accept becomes instant/free** (paperwork: no crew, no turn cost). Completion checks run when the satisfying task completes (jump arrival → DELIVER; scan → EXPLORE/FIND), same as today's hooks moved into tick resolution.
+
+## 4. Duration Model: Work Points & Team Power
+
+`duration = max(1, ceil(work(action) / totalPower) + mismatchPenalty + traitModifierSum)`
+
+- `work(action)` — work points (balance knobs, §11): EXPLORE=4 · JUMP=hops×3 (single 3 / two-hop 6) · SHIP work=6 · RESEARCH=9. Durations are deliberately much longer than today; teams and skill levels claw back the time.
+- `totalPower` — sum over lead + helpers of each member's power band in that action type's skill: L0–L2 → 1, L3–L4 → 2, L5 → 3. (Until #45 lands there is no skill table, so every crew member contributes power 1 — teamwork already works; progression layers on top.)
+- `mismatchPenalty` — +1 turn if the LEAD's role is not a preferred role for the action type (preferred: JUMP → PILOT/NAVIGATOR · EXPLORE → SCIENTIST · SHIP work → ENGINEER/TECHNICIAN · RESEARCH → SCIENTIST). Helpers are never penalised. STEADY UNDER PRESSURE cancels it.
+- `traitModifierSum` — sum of the LEAD's trait modifiers for this action type (§5 table). Helper traits do not apply.
+
+Solo durations (power 1, no mismatch/traits): EXPLORE 4 · JUMP single 3 / two-hop 6 · SHIP work 6 · RESEARCH 9. A maxed specialist + helpers converges back to ~1–2 turns (§6 examples).
+
+## 5. Trait Mechanics — all 20 traits
+
+Duration modifiers (lead only, additive in §4 formula):
+
+| Good trait | Effect |
+|---|---|
+| STEADY UNDER PRESSURE | Cancels role-mismatch penalty on any action |
+| RECKLESS COURAGE | JUMP −1 turn |
+| CALM IN A CRISIS | EXPLORE −1 turn |
+| FIXES ANYTHING | SHIP work −1 turn |
+| READS STARS BLIND | JUMP −1 turn |
+| QUICK HANDS | Any action −1 turn |
+| IRON WILL | RESEARCH −1 turn |
+
+| Bad trait | Effect |
+|---|---|
+| RIGID — SLOW TO ADAPT | RESEARCH +1 turn |
+| OVERCAUTIOUS | Any action +1 turn |
+| SLOWS THE CREW DOWN | Any action +1 turn |
+| CARELESS WITH FUSES | SHIP work +1 turn |
+| HOARDS RATIONS | SHIP work +1 turn |
+| FORGETS TO EAT | EXPLORE +1 turn |
+| ARGUES WITH EVERYONE | RESEARCH +1 turn |
+| DOUBTS THE CAPTAIN | JUMP +1 turn |
+
+Outcome effects (#43): FINDS HIDDEN THINGS → exploration hauls gain +1 item (extra roll on the same seeded per-planet stream) · TALKS TO ANYONE → crew-recruit chance 18% → 30%.
+Encounter-ready STANDBY (activate when random encounters land; shown as "STANDBY" in UI): SHARP SHOOTER, SHORT FUSE, JINXED IN A DOGFIGHT.
+
+## 6. Skill Progression & Specialisation
+
+- **Skills** — one per action type: NAVIGATION (jumps), SCANNING (exploration), ENGINEERING (ship work), RESEARCH. Stored in a new `crew_skills` table (schema v8): saveId, crewId, skill, level, xp — extensible for future COMBAT/MEDICAL skills.
+- **Roles keep their names** — the existing 8 roles are unchanged; skills are a separate progression axis. A role matters only for: starting levels and the lead mismatch penalty.
+- **Starting specialisation (role → L2 in its skill(s)):** PILOT/NAVIGATOR → NAVIGATION · SCIENTIST → SCANNING + RESEARCH · ENGINEER/TECHNICIAN → ENGINEERING · COMMANDER/MEDIC/GUNNER → all skills L0 (generalists; MEDIC/GUNNER become relevant with encounters).
+- **Buildup by doing the job:** on task completion, every assigned crew member (lead and helpers) gains +1 XP in that action type's skill. Level thresholds (cumulative completions): L1=5 · L2=10 · L3=15 · L4=20 · L5=25 (cap).
+- **Power bands:** L0–L2 → 1 · L3–L4 → 2 · L5 → 3 (§4).
+- **Titles** (display only, role name preserved): highest skill level ≥5 → "MASTER <ROLE>", ≥3 → "SENIOR <ROLE>". Level-ups write an event ("BEN OKONKWO is now a SENIOR PILOT — NAVIGATION L3").
+
+Duration examples (work values §4): EXPLORE solo rookie 4 turns → solo master 2 → master+rookie helper 1 · JUMP two-hop solo rookie 6 → solo master 2 → two masters 1 · SHIP work solo rookie 6 → solo master 2 · RESEARCH solo rookie 9 → solo master 3 (stays the long pole by design).
+
+## 7. API Changes
+
+- All action endpoints become queueing operations and gain crew params: `POST /api/jump {targetSystemId, leadCrewId, helperCrewIds[]}` · `POST /api/explore {planetId, ...}` · `POST /api/ship/{upgrade|expand|build} {...}` · `POST /api/research {techSlug, ...}`. Validation at queue time: unknown crew → 404; busy/committed crew → 409; in-transit or second jump → 409; unreachable target / unaffordable cost / build gate → existing error codes. No turn increment on queue.
+- New `POST /api/turn` — advances exactly one turn (§3 tick), returns full snapshot.
+- Snapshots (world/system/crew responses) gain an active+pending `tasks` array: {id, type, targetLabel, leadName, helperNames[], remaining} so the UI can render the task strip and disable busy crew. The admin CRUD panel picks up new tables automatically.
+- OpenAPI spec in lib/openapi.ts updated accordingly; DDL in lib/db/client.ts kept in sync with lib/db/schema.ts (repo rule).
+
+## 8. UI
+
+- **NEXT TURN button fixed bottom-right** with current turn counter ("TURN 12") — the game's heartbeat; pressing it with an empty queue is a free skip.
+- **Crew picker:** action buttons open an inline team builder — pick lead (radio), toggle helpers (checkboxes); live-computed duration updates as the team changes ("Lead AVA VANCE · PILOT L2 + 1 helper → 3 turns"); busy/committed members disabled with reason.
+- **Active-tasks strip** (bottom-left): each task's type, target, team, remaining turns; pending FIFO tasks shown dimmed.
+- **CREW tab:** per member — role (+title), traits, and the 4 skill levels; STANDBY traits labelled as encounter-ready.
+- **Event log:** task-completion and level-up events.
+
+## 9. Determinism & Testing
+
+- Duration is a pure function `(actionType, hopCount, lead, helpers) → number` — unit-tested across work values × power bands × mismatch × trait matrix.
+- XP/level-ups are deterministic (no rng). Trait outcome effects (#43) draw from the existing seeded per-planet streams (same save+planet → same haul), keeping everything reproducible.
+- Unit tests (colocated *.test.ts): duration matrix; queue validation rules (busy 409, in-transit 409, second jump 409); tick resolution (completion effects, XP grant, level-up event, FIFO auto-start, mission checks); cost deduction at queue time.
+- E2E (CI-only per AGENTS.md): assign team → NEXT TURN ×N → effect lands; parallel tasks complete independently; pre-queued FIFO starts after predecessor completes; in-transit queuing blocked; empty-queue skip works.
+
+## 10. Delivery Plan — Gitea issues as TODO list
+
+One issue = one feature branch/PR/version bump, per AGENTS.md loop (branch off master → version bump + CHANGELOG entry → local verify `tsc --noEmit` / `vitest run` / `playwright test --list` → push, CI auto-merge on green → tag → manual deploy → close issue with comment).
+
+| Issue | Version | Scope |
+|---|---|---|
+| #44 Crew-driven actions + NEXT TURN engine | v0.10.0 | tasks table (schema v7; backfill creates empty table for existing saves), POST /api/turn tick, all action endpoints → queueing with lead+helpers, duration model (§4; power 1 for everyone until #45), trait duration modifiers (§5), UI: NEXT TURN button bottom-right + turn counter, crew picker with live duration, task strip. OpenAPI update. Rework existing unit/e2e assertions from instant-resolution to the queue+tick model |
+| #45 Skill progression & specialisation | v0.11.0 | crew_skills table (schema v8; idempotent backfill seeds rows per role mapping for existing saves), XP on completion for all assigned crew, level-up events, power bands active (§6), UI: skill display in CREW tab + titles, picker shows per-member contribution |
+| #43 Trait outcome effects | v0.12.0 | FINDS HIDDEN THINGS → hauls +1 item; TALKS TO ANYONE → recruit chance 30% |
+
+## 11. Balance Knobs (single tuning surface)
+
+All constants live in one new module `lib/game/crew-costs.ts` (alongside ship-costs.ts): WORK_POINTS per action type, POWER_BANDS, XP_THRESHOLDS, STARTING_LEVELS per role, recruit chance values. Tuning a number = editing one file; the duration formula and resolvers read from it.

e2e/admin.spec.ts

@@ -0,0 +1,41 @@
+import { expect, test } from '@playwright/test';
+
+// #38 — ADMIN DB CRUD panel. READ-ONLY on purpose: specs share the CI DB across retries, so no
+// insert/update/delete here (the mutation endpoints are covered by unit tests in lib/db/admin.test.ts).
+
+interface AdminColumnDto { name: string; type: string; pk: number }
+interface AdminTableDto { name: string; columns: AdminColumnDto[]; count: number }
+interface AdminRowsDto { rows: Record<string, unknown>[]; total: number }
+
+test('ADMIN button opens the panel and lists every table (#38)', async ({ page }) => {
+  await page.goto('/');
+  // The ADMIN button sits in the header next to the SECTOR SCAN badge.
+  await page.getByRole('button', { name: 'ADMIN' }).click();
+
+  await expect(page.getByText('ADMIN // DB CRUD')).toBeVisible();
+  // Cross-check against the API: every table it lists must render in the panel (and vice versa).
+  const tables = (await (await page.request.get('/api/admin/tables')).json()) as AdminTableDto[];
+  expect(tables.length).toBeGreaterThanOrEqual(10);
+  for (const t of tables) {
+    await expect(page.getByRole('button', { name: new RegExp(`^${t.name}\\b`) })).toBeVisible();
+  }
+});
+
+test('opening a table renders its rows from the API (#38)', async ({ page }) => {
+  await page.goto('/');
+  await page.getByRole('button', { name: 'ADMIN' }).click();
+
+  // saves always has exactly one row (single-player by design) — deterministic across retries.
+  const api = (await (await page.request.get('/api/admin/tables/saves/rows')).json()) as AdminRowsDto;
+  expect(api.total).toBeGreaterThan(0);
+
+  await page.getByRole('button', { name: /^saves\b/ }).click();
+  // Column headers come from the API's column list.
+  for (const col of api.rows[0] ? Object.keys(api.rows[0]) : []) {
+    await expect(page.locator('table th', { hasText: col })).toBeVisible();
+  }
+  // Row count matches what the API reports, and a cell shows real data from it.
+  const body = page.locator('table tbody tr');
+  await expect(body).toHaveCount(api.rows.length);
+  await expect(page.locator('table tbody').getByText(String(api.rows[0].seed))).toBeVisible();
+});

e2e/helpers.ts

@@ -0,0 +1,89 @@
+import { expect, type Page } from '@playwright/test';
+
+// Shared e2e helpers — kept out of the specs so both files can reuse them.
+
+interface WorldSystemDto { id: number; name: string; x: number; y: number; discovered: boolean; current: boolean }
+interface WorldState { systems: WorldSystemDto[]; edges: [number, number][]; turn: number }
+
+// Minimal crew member — GET /api/crew is the {crew, tasks} object (Task 6 / JC-7); the full
+// member shape lives in e2e/state.spec.ts.
+interface CrewDto { id: number; role: string }
+
+// The real TaskType strings (lib/game/tasks.ts) keyed by the action POST path — there is no
+// bare SHIP type, ship actions split into UPGRADE / EXPAND / BUILD.
+const TASK_TYPE: Record<string, string> = {
+  '/api/jump': 'JUMP',
+  '/api/explore': 'EXPLORE',
+  '/api/research': 'RESEARCH',
+  '/api/ship/upgrade': 'SHIP_UPGRADE',
+  '/api/ship/expand': 'SHIP_EXPAND',
+  '/api/ship/build': 'SHIP_BUILD',
+};
+
+// The GET endpoint that serves each action's final snapshot (the action paths are POST-only).
+const FINAL_SNAPSHOT: Record<string, string> = {
+  '/api/jump': '/api/world',
+  '/api/explore': '/api/system',
+  '/api/research': '/api/tech',
+  '/api/ship/upgrade': '/api/ship',
+  '/api/ship/expand': '/api/ship',
+  '/api/ship/build': '/api/ship',
+};
+
+// Queue an action POST with a default one-person crew, then tick until that task resolves.
+// The POST only queues (200, no turn bump, effect not yet visible); the effect appears once the
+// task hits 0 on a tick — a task that starts ACTIVE with remaining N resolves on the Nth tick
+// (lib/game/tasks.ts tickTurn) — so N (the full duration) is read from the queue response's
+// tasks array and POST /api/turn is sent exactly N times. Returns the final snapshot for the
+// path. A 409 on the queue POST is a busy / in-transit rejection (Task 3), not a tick-count bug.
+export async function resolveAction(page: Page, path: string, data: Record<string, unknown>): Promise<unknown> {
+  const roster = (await (await page.request.get('/api/crew')).json()) as { crew?: CrewDto[] } | CrewDto[];
+  const members: CrewDto[] = Array.isArray(roster) ? roster : (roster.crew ?? []); // {crew, tasks} object (JC-7); the array guard keeps the helper shape-tolerant
+  expect(members.length).toBeGreaterThan(0); // starting crew is always seeded
+  const res = await page.request.post(path, { data: { ...data, leadCrewId: members[0].id, helperCrewIds: [] } });
+  expect(res.status()).toBe(200);
+  const snap = (await res.json()) as { tasks?: { type: string; remaining: number }[] };
+  const n = snap.tasks?.find((t) => t.type === TASK_TYPE[path])?.remaining ?? 1;
+  for (let i = 0; i < n; i++) expect((await page.request.post('/api/turn')).status()).toBe(200);
+  return (await page.request.get(FINAL_SNAPSHOT[path])).json();
+}
+
+// Jump to an adjacent system, preferring one that is still undiscovered. Every jump into an
+// undiscovered system generates 4 fresh neighbours (lib/game/world.ts), so fresh territory is
+// always available — picking the FIRST edge instead ping-pongs between exhausted systems, because
+// edges come back in insertion order and the oldest route out of a system is usually the one that
+// led here. Falls back to any non-current adjacent system if none is undiscovered. The jump is
+// queued with a default one-person crew and ticked to completion (resolveAction) before this
+// returns, so the caller is already standing in the target system, not merely en route to it.
+export async function jumpToFreshSystem(page: Page): Promise<WorldState> {
+  const world = (await (await page.request.get('/api/world')).json()) as WorldState;
+  const currentId = world.systems.find((s) => s.current)!.id;
+
+  const adjacentIds = new Set<number>();
+  for (const [a, b] of world.edges) {
+    if (a === currentId) adjacentIds.add(b);
+    else if (b === currentId) adjacentIds.add(a);
+  }
+  const candidates = [...adjacentIds].map((id) => world.systems.find((s) => s.id === id)!);
+  const target = candidates.find((s) => !s.discovered) ?? candidates[0];
+  expect(target).toBeDefined(); // every system has at least one route out (ring generation)
+
+  const after = (await resolveAction(page, '/api/jump', { systemId: target.id })) as WorldState;
+  expect(after.systems.find((s) => s.current)?.id).toBe(target.id); // landed, not just queued
+  return after;
+}
+
+// Tick the save's task queue until it is empty (free skips are legal 200s; every tick decrements
+// every ACTIVE row and PENDING rows auto-start, so a non-empty queue always shrinks — the bound
+// only fails a pathological state). Every spec that queues actions starts from this on retry:
+// the CI DB persists across attempts, and a failed one may have left a row behind — an in-transit
+// JUMP would 409 every new queue (lib/game/tasks.ts's in-transit rule).
+export async function drainQueue(page: Page): Promise<void> {
+  for (let ticks = 0; ; ticks++) {
+    const body = (await (await page.request.get('/api/crew')).json()) as { crew?: CrewDto[]; tasks?: { id: number }[] } | CrewDto[];
+    const tasks = Array.isArray(body) ? [] : (body.tasks ?? []);
+    if (tasks.length === 0) return;
+    expect(ticks).toBeLessThan(60);
+    expect((await page.request.post('/api/turn')).status()).toBe(200);
+  }
+}

e2e/smoke.spec.ts

@@ -1,13 +1,88 @@
-import { expect, test } from '@playwright/test';
+import { expect, test, type Page } from '@playwright/test';
+import { drainQueue, jumpToFreshSystem, resolveAction } from './helpers';
 
 // Mirrors the /api/world + /api/system response shapes (lib/game/save.ts) — kept local so the spec stays self-contained.
+// Since Task 6 both snapshots also carry the save's task queue (ACTIVE block first, then PENDING).
 interface WorldSystemDto { id: number; name: string; x: number; y: number; discovered: boolean; current: boolean }
-interface WorldState { systems: WorldSystemDto[]; edges: [number, number][]; turn: number }
+// The subset of QueueDto the spec reads: the task type and its live duration (`remaining`).
+interface QueueTaskDto { type: string; remaining: number }
+interface WorldState { systems: WorldSystemDto[]; edges: [number, number][]; turn: number; tasks: QueueTaskDto[] }
 interface PlanetDto { id: number; name: string; type: string; hazard: boolean; explored: boolean; parent: number | null }
 interface InventoryItemDto { kind: string; name: string; qty: number }
-interface SystemState { systemId: number; systemName: string; planets: PlanetDto[]; inventory: InventoryItemDto[]; turn: number }
+interface SystemState { systemId: number; systemName: string; planets: PlanetDto[]; inventory: InventoryItemDto[]; turn: number; tasks: QueueTaskDto[] }
 interface FoundItem { kind: string; name: string; qty: number }
-interface ExploreResult extends SystemState { outcome: FoundItem[] }
+interface ExploreResult extends SystemState { outcome: FoundItem[]; crewFound: unknown }
+interface CrewDto { id: number; name: string; role: string; traitGood: string; traitBad: string; origin: string }
+interface ShipSystemDto { id: number; type: string; level: number; capacity: number; built: boolean }
+interface ShipState { systems: ShipSystemDto[]; inventory: InventoryItemDto[]; turn: number }
+interface MissionDto { id: number; type: string; description: string; targetSystemId: number | null; conditionKind: string | null; progressTarget: number; progress: number; rewardKind: string; rewardQty: number; state: string }
+interface EventDto { id: number; turn: number; type: string; message: string; createdAt: string }
+
+const totalQty = (items: InventoryItemDto[], kind: string) => items.filter((i) => i.kind === kind).reduce((sum, i) => sum + i.qty, 0);
+
+// BFS over the undirected jump routes — [next, ..., target], empty when already there.
+const shortestJumpPath = (fromId: number, toId: number, edges: [number, number][]): number[] => {
+  const adj = new Map<number, number[]>();
+  for (const [a, b] of edges) {
+    if (!adj.has(a)) adj.set(a, []);
+    if (!adj.has(b)) adj.set(b, []);
+    adj.get(a)!.push(b);
+    adj.get(b)!.push(a);
+  }
+  const prev = new Map<number, number>();
+  const seen = new Set([fromId]);
+  const queue = [fromId];
+  while (queue.length > 0 && !seen.has(toId)) {
+    const cur = queue.shift()!;
+    for (const next of adj.get(cur) ?? []) {
+      if (!seen.has(next)) {
+        seen.add(next);
+        prev.set(next, cur);
+        queue.push(next);
+      }
+    }
+  }
+  expect(seen.has(toId)).toBe(true); // the world graph is connected by construction
+  const path: number[] = [];
+  for (let cur = toId; cur !== fromId; cur = prev.get(cur)!) {
+    path.unshift(cur);
+  }
+  return path;
+};
+
+// --- PR A's UI flow (Task 8's team builder + Task 7's NEXT TURN button) -----------------
+
+// The team-builder half of every action panel: pick the default one-person crew in the mounted
+// builder — the first lead radio, the same default member (the roster is in join order) that
+// resolveAction queues with, no helpers — and click DISPATCH. Returns the queue POST's response:
+// 200, no turn bump, the effect not yet applied. Its `tasks` array (where the snapshot carries
+// one) holds the new task's `remaining` — the team's live duration N (Task 6).
+async function dispatchDefaultCrew(page: Page, path: string) {
+  await page.getByRole('tabpanel').locator('input[type="radio"][name="lead"]').first().check();
+  const [res] = await Promise.all([
+    page.waitForResponse((r) => r.request().method() === 'POST' && r.url().endsWith(path)),
+    page.getByRole('button', { name: 'DISPATCH' }).click(),
+  ]);
+  return res;
+}
+
+// One NEXT TURN click (Task 7) = one POST /api/turn. The button drops a click while a tick is
+// in flight, so each click waits for the button's own TURN span (the shell's ship snapshot —
+// refreshed on every tick) to show the next turn before the following click.
+async function tickTo(page: Page, toTurn: number) {
+  await page.getByRole('button', { name: 'NEXT TURN' }).click();
+  await expect(page.getByText(`TURN ${toTurn}`, { exact: true })).toBeVisible();
+}
+
+// The N for a ship or research action, read from the crew snapshot: the queueing routes for
+// /api/ship/* and /api/research return a bare ShipState / TechDto[] with no `tasks` field of
+// their own (unlike the world/system snapshots), but the queue itself is the same one GET
+// /api/crew exposes (JC-7). Every test ticks its actions to completion, so at most one task of
+// a given type is ever in the queue when this reads it.
+async function crewTasks(page: Page): Promise<QueueTaskDto[]> {
+  const { tasks } = (await (await page.request.get('/api/crew')).json()) as { crew: CrewDto[]; tasks: QueueTaskDto[] };
+  return tasks;
+}
 
 test('landing page loads with the SpaceWanderer title', async ({ page }) => {
   await page.goto('/');
@@ -27,19 +102,77 @@ test('game template tabs render (scificn-ui component layer wired in)', async ({
 test('tabs switch panels client-side (event log terminal)', async ({ page }) => {
   await page.goto('/');
   await page.getByRole('tab', { name: 'EVENT LOG' }).click();
-  await expect(page.getByText('SHIP LOG // PLACEHOLDER FEED')).toBeVisible();
+  // The placeholder feed was replaced by the real log (v0.9.0): at least one T<turn> // <MESSAGE> line
+  // must render — every save has the turn-0 new_game event, so this holds on a fresh stack and across retries.
+  await expect(page.getByText(/T\d+ \/\/ /).first()).toBeVisible();
+});
+
+test('active tab survives a page reload (#27)', async ({ page }) => {
+  await page.goto('/');
+  // Fresh context → nothing stored yet, so CREW starts unselected (the default is WORLD MAP).
+  await expect(page.getByRole('tab', { name: 'CREW' })).toHaveAttribute('aria-selected', 'false');
+  await page.getByRole('tab', { name: 'CREW' }).click();
+  await expect(page.getByRole('tab', { name: 'CREW' })).toHaveAttribute('aria-selected', 'true');
+
+  await page.reload();
+  // The tab is restored from localStorage on mount — no API state involved, so this holds across retries.
+  await expect(page.getByRole('tab', { name: 'CREW' })).toHaveAttribute('aria-selected', 'true');
+});
+
+test('tab bar stays pinned while panel content scrolls (#31)', async ({ page }) => {
+  await page.goto('/');
+  // Shrink the viewport so the center pane's content overflows its scroll area regardless of save state.
+  await page.setViewportSize({ width: 1280, height: 560 });
+
+  // SHIP SYSTEMS always renders six stacked system cards (seeded at start, never removed) — tall
+  // enough to overflow the shrunk pane on any save state, deterministic across retries. (#36 made
+  // WORLD MAP fill its pane instead of overflowing it, so it can no longer force the scroll.)
+  await page.getByRole('tab', { name: 'SHIP SYSTEMS' }).click();
+  await expect(page.getByRole('heading', { name: 'HULL' })).toBeVisible();
+
+  const tablist = page.getByRole('tablist');
+  await expect(tablist).toBeVisible();
+  const before = await tablist.boundingBox();
+  expect(before).not.toBeNull();
+
+  // Scroll the nearest scroll container above the tab list all the way down.
+  const scrolled = await page.evaluate(() => {
+    let el = document.querySelector('[role="tablist"]')?.parentElement ?? null;
+    while (el && !['auto', 'scroll'].includes(getComputedStyle(el).overflowY)) el = el.parentElement;
+    if (!el) throw new Error('no scroll container above the tab list');
+    el.scrollTop = el.scrollHeight;
+    return el.scrollTop;
+  });
+  expect(scrolled).toBeGreaterThan(50); // content really overflowed — guards against a vacuous pass
+
+  await expect(tablist).toBeVisible();
+  const after = await tablist.boundingBox();
+  expect(after).not.toBeNull();
+  // Pinned: the tab bar's viewport position is unchanged even though the content scrolled away (#31).
+  expect(Math.abs(after!.y - before!.y)).toBeLessThan(2);
 });
 
 test('world map shows the generated starting system and its neighbours', async ({ page }) => {
+  const world = (await (await page.request.get('/api/world')).json()) as WorldState;
+  // #35 — once NAVIGATION AI is researched the chart also offers two-hop systems, so the expected
+  // button count depends on the save's tech state (the CI DB persists across retries).
+  const techs = (await (await page.request.get('/api/tech')).json()) as { slug: string; state: string }[];
+  const maxHops = techs.some((t) => t.slug === 'NAV_AI' && t.state === 'RESEARCHED') ? 2 : 1;
+
   await page.goto('/');
-  // Live chart title carries the turn counter; a fresh save sits at the start with six jump routes.
+  // Live chart title carries the turn counter.
   await expect(page.getByText(/GALACTIC CHART \/\/ JUMP ROUTES — TURN \d+/)).toBeVisible();
-  const jumpButtons = page.getByRole('button', { name: /\/\/ JUMP$/ });
-  await expect(jumpButtons.first()).toBeVisible();
-  await expect(jumpButtons).toHaveCount(6);
+  // The current system is marked, and every in-range system is a clickable chart field (role=button).
+  const current = world.systems.find((s) => s.current)!;
+  await expect(page.getByText('CURRENT', { exact: true })).toBeVisible();
+  const panel = page.getByRole('tabpanel');
+  // Six on a fresh save without NAV AI; the two-hop ring joins once it is researched.
+  const jumpable = world.systems.filter((s) => s.id !== current.id && shortestJumpPath(current.id, s.id, world.edges).length <= maxHops);
+  await expect(panel.getByRole('button')).toHaveCount(jumpable.length);
 });
 
 test('jumping to an adjacent system updates the world state and turn counter', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
   const before = (await (await page.request.get('/api/world')).json()) as WorldState;
   const currentId = before.systems.find((s) => s.current)!.id;
   const edge = before.edges.find(([a, b]) => a === currentId || b === currentId)!;
@@ -47,13 +180,60 @@ test('jumping to an adjacent system updates the world state and turn counter', a
   const targetName = before.systems.find((s) => s.id === targetId)!.name;
 
   await page.goto('/');
-  await page.getByRole('button', { name: `${targetName.toUpperCase()} // JUMP` }).click();
+  // Click the target's chart field — it ARMS the node: the crew team builder floats over the chart.
+  await page.getByRole('tabpanel').getByRole('button', { name: targetName.toUpperCase(), exact: true }).click();
+  // Dispatch with the default one-person crew — the POST only QUEUES the JUMP: 200, no turn bump,
+  // and the ship has not moved yet (the origin is still `current` in the queue response).
+  const res = await dispatchDefaultCrew(page, '/api/jump');
+  expect(res.status()).toBe(200);
+  const queued = (await res.json()) as WorldState;
+  expect(queued.turn).toBe(before.turn);
+  expect(queued.systems.find((s) => s.current)?.id).toBe(currentId); // no instant landing
+  const n = queued.tasks.find((t) => t.type === 'JUMP')!.remaining; // N = the team's live duration (Task 6/8)
+
+  // The tick, not the queue, advances the counter: N NEXT TURN clicks, one turn each.
+  for (let k = 1; k <= n; k++) await tickTo(page, before.turn + k);
 
   const after = (await (await page.request.get('/api/world')).json()) as WorldState;
-  expect(after.turn).toBe(before.turn + 1);
+  expect(after.turn).toBe(before.turn + n);
   expect(after.systems.find((s) => s.current)?.id).toBe(targetId);
 });
 
+test('local system shows the new current system after a jump, without a page reload (#30)', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
+  const before = (await (await page.request.get('/api/world')).json()) as WorldState;
+  const currentId = before.systems.find((s) => s.current)!.id;
+  const edge = before.edges.find(([a, b]) => a === currentId || b === currentId)!;
+  const targetId = edge[0] === currentId ? edge[1] : edge[0];
+  const targetName = before.systems.find((s) => s.id === targetId)!.name;
+
+  await page.goto('/');
+  // Jump through the UI: click the target's chart field on WORLD MAP (the default tab) — it arms
+  // the node and floats the crew team builder over the chart.
+  await page.getByRole('tabpanel').getByRole('button', { name: targetName.toUpperCase(), exact: true }).click();
+  const res = await dispatchDefaultCrew(page, '/api/jump');
+  expect(res.status()).toBe(200);
+  // The queue response is applied to the chart — but the turn is still the origin's: no landing,
+  // no counter bump until the ticks.
+  const queued = (await res.json()) as WorldState;
+  expect(queued.turn).toBe(before.turn);
+  expect(queued.systems.find((s) => s.current)?.id).toBe(currentId);
+  const n = queued.tasks.find((t) => t.type === 'JUMP')!.remaining;
+
+  // Wait until the ticks are done: the tick, not the queue, advances the counter (the button's
+  // TURN span is the shell's live counter; the last click lands the jump and shows TURN before+N).
+  for (let k = 1; k <= n; k++) await tickTo(page, before.turn + k);
+
+  const after = (await (await page.request.get('/api/world')).json()) as WorldState;
+  const newCurrent = after.systems.find((s) => s.current)!;
+  expect(newCurrent.id).toBe(targetId); // the jump landed where we aimed, on the Nth tick
+
+  // Switch to LOCAL SYSTEM — it must show the NEW current system without a page reload (#30):
+  // the shell re-fetches /api/system on every tick, so its header carries the final turn.
+  await page.getByRole('tab', { name: 'LOCAL SYSTEM' }).click();
+  await expect(page.getByText(`EXPLORABLE WORLDS // ${newCurrent.name.toUpperCase()} — TURN ${after.turn}`)).toBeVisible();
+});
+
 test('local system shows the current system bodies with staggered moons and explore buttons', async ({ page }) => {
   const sys = (await (await page.request.get('/api/system')).json()) as SystemState;
 
@@ -69,23 +249,41 @@ test('local system shows the current system bodies with staggered moons and expl
 });
 
 test('exploring a body flips its row state, bumps the turn and shows the scan result', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
   const before = (await (await page.request.get('/api/system')).json()) as SystemState;
   const target = before.planets.find((p) => !p.explored)!;
 
   await page.goto('/');
   await page.getByRole('tab', { name: 'LOCAL SYSTEM' }).click();
+  // The row's button ARMS the planet (it flips to PICK TEAM); the crew team builder mounts above the list.
   await page.getByRole('button', { name: `${target.name.toUpperCase()} // EXPLORE` }).click();
+  // Dispatch with the default one-person crew — the POST only QUEUES the scan: 200, no turn bump,
+  // the body still unexplored in the response and its `outcome` empty until the scan resolves (JC-2).
+  const res = await dispatchDefaultCrew(page, '/api/explore');
+  expect(res.status()).toBe(200);
+  const queued = (await res.json()) as ExploreResult;
+  expect(queued.turn).toBe(before.turn);
+  expect(queued.planets.find((p) => p.id === target.id)?.explored).toBe(false);
+  expect(queued.outcome).toEqual([]);
+  expect(queued.crewFound).toBeNull();
+  const n = queued.tasks.find((t) => t.type === 'EXPLORE')!.remaining;
+
+  // The ticks: the scan resolves (explored flips, the haul lands) on the Nth one.
+  for (let k = 1; k <= n; k++) await tickTo(page, before.turn + k);
 
   const after = (await (await page.request.get('/api/system')).json()) as SystemState;
-  expect(after.turn).toBe(before.turn + 1);
+  expect(after.turn).toBe(before.turn + n);
   expect(after.planets.find((p) => p.id === target.id)?.explored).toBe(true);
 
-  // UI reflects it: the row badge flipped to SCANNED and its EXPLORE button is gone.
+  // UI reflects it after the ticks: the row badge flipped to SCANNED and its EXPLORE button is gone.
+  // (The SCAN RESULT block already showed the queue response's empty outcome — NOTHING FOUND — as
+  // soon as the scan was dispatched; the haul itself only ever lands on the tick, into the hold.)
   await expect(page.getByRole('button', { name: `${target.name.toUpperCase()} // EXPLORE` })).toHaveCount(0);
   await expect(page.getByText(/SCAN RESULT \/\/ /)).toBeVisible();
 });
 
 test('exploration yields finds that accumulate in the inventory', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
   // Scan bodies until one yields something (most scans do; jumping keeps it going if a whole
   // system is exhausted). P(no find across this many scans) ≈ 0.21^30 — negligible.
   const found = new Map<string, number>(); // kind|name -> qty
@@ -95,18 +293,22 @@ test('exploration yields finds that accumulate in the inventory', async ({ page
     const sys = (await (await page.request.get('/api/system')).json()) as SystemState;
     const unexplored = sys.planets.filter((p) => !p.explored);
     if (unexplored.length > 0) {
-      const res = await page.request.post('/api/explore', { data: { planetId: unexplored[0].id } });
-      expect(res.status()).toBe(200);
-      for (const item of ((await res.json()) as ExploreResult).outcome) {
-        found.set(`${item.kind}|${item.name}`, item.qty);
+      // Queue + tick the scan (resolveAction). The queue response's `outcome` is empty until the
+      // tick (JC-2), so the haul is read from the post-tick /api/system snapshot it returns:
+      // the inventory delta of this scan (the queue is clean at the start of every iteration).
+      const after = (await resolveAction(page, '/api/explore', { planetId: unexplored[0].id })) as SystemState;
+      const before = new Map(sys.inventory.map((i) => [`${i.kind}|${i.name}`, i.qty]));
+      for (const item of after.inventory) {
+        const qty = item.qty - (before.get(`${item.kind}|${item.name}`) ?? 0);
+        if (qty > 0) found.set(`${item.kind}|${item.name}`, qty);
       }
     } else {
-      // Current system fully scanned — jump somewhere and keep scanning.
+      // Current system fully scanned — jump somewhere (queued, then ticked) and keep scanning.
       const world = (await (await page.request.get('/api/world')).json()) as WorldState;
       const currentId = world.systems.find((s) => s.current)!.id;
       const edge = world.edges.find(([a, b]) => a === currentId || b === currentId)!;
       const targetId = edge[0] === currentId ? edge[1] : edge[0];
-      expect((await page.request.post('/api/jump', { data: { systemId: targetId } })).status()).toBe(200);
+      await resolveAction(page, '/api/jump', { systemId: targetId });
     }
   }
   expect(found.size).toBeGreaterThan(0);
@@ -119,6 +321,415 @@ test('exploration yields finds that accumulate in the inventory', async ({ page
   }
 });
 
+test('CREW tab renders real roster cards, each showing both traits and an origin', async ({ page }) => {
+  // GET /api/crew is the {crew, tasks} object since Task 6 (JC-18) — the roster is its crew field.
+  const { crew } = (await (await page.request.get('/api/crew')).json()) as { crew: CrewDto[]; tasks: QueueTaskDto[] };
+  expect(crew.length).toBeGreaterThanOrEqual(2); // starting crew is always seeded
+
+  await page.goto('/');
+  await page.getByRole('tab', { name: 'CREW' }).click();
+
+  for (const member of crew) {
+    const heading = page.getByRole('heading', { name: member.name });
+    await expect(heading).toBeVisible();
+    // The card is the third div ancestor of the title (flex row → CardHeader → Card).
+    const card = heading.locator('xpath=ancestor::div[3]');
+    await expect(card.getByText(member.role)).toBeVisible();
+    await expect(card.getByText(member.traitGood)).toBeVisible();
+    await expect(card.getByText(member.traitBad)).toBeVisible();
+    await expect(card.getByText(`ORIGIN // ${member.origin.toUpperCase()}`)).toBeVisible();
+  }
+});
+
+test('SHIP SYSTEMS tab performs an affordable action and reflects it in the card and left column', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
+  // Scan bodies until something is affordable: an upgrade costs `level` resources (at least one),
+  // a build costs three parts. Every scan/jump is queued with a default crew and ticked to
+  // completion (resolveAction) — the hold only changes once the task resolves on a tick. Jumping
+  // keeps it going if a whole system is exhausted.
+  let ship = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  const upgradeTarget = () => ship.systems.find((s) => s.built && s.level < 5 && totalQty(ship.inventory, 'resource') >= s.level);
+  // WEAPONS is gated behind the unresearched WEAPONS SYSTEMS tech — its build path is covered by
+  // the research test below, so this one only targets ungated types.
+  const buildTarget = () => (totalQty(ship.inventory, 'part') >= 3 ? ship.systems.find((s) => !s.built && s.type !== 'WEAPONS') : undefined);
+
+  let iterations = 0;
+  while (!upgradeTarget() && !buildTarget() && iterations < 60) {
+    iterations++;
+    const sys = (await (await page.request.get('/api/system')).json()) as SystemState;
+    const unexplored = sys.planets.filter((p) => !p.explored);
+    if (unexplored.length > 0) {
+      await resolveAction(page, '/api/explore', { planetId: unexplored[0].id });
+    } else {
+      const world = (await (await page.request.get('/api/world')).json()) as WorldState;
+      const currentId = world.systems.find((s) => s.current)!.id;
+      const edge = world.edges.find(([a, b]) => a === currentId || b === currentId)!;
+      const targetId = edge[0] === currentId ? edge[1] : edge[0];
+      await resolveAction(page, '/api/jump', { systemId: targetId });
+    }
+    ship = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  }
+
+  const upgrade = upgradeTarget();
+  const build = !upgrade ? buildTarget() : undefined;
+  expect(upgrade ?? build).toBeDefined(); // the bounded scan always finds something to spend on
+
+  await page.goto('/');
+  await page.getByRole('tab', { name: 'SHIP SYSTEMS' }).click();
+
+  if (upgrade) {
+    // The UPGRADE button ARMS the action — the crew team builder mounts above the grid.
+    const card = page.getByRole('heading', { name: upgrade.type }).locator('xpath=ancestor::div[3]');
+    await expect(card.getByRole('button', { name: 'UPGRADE' })).toBeEnabled();
+    await card.getByRole('button', { name: 'UPGRADE' }).click();
+
+    // Dispatch with the default one-person crew — the POST only QUEUES the upgrade: 200, no turn
+    // bump, the cost (`level` resources) already deducted from the hold, the level NOT yet up.
+    const res = await dispatchDefaultCrew(page, '/api/ship/upgrade');
+    expect(res.status()).toBe(200);
+    const queued = (await res.json()) as ShipState;
+    expect(queued.turn).toBe(ship.turn);
+    expect(queued.systems.find((s) => s.id === upgrade.id)!.level).toBe(upgrade.level); // no instant upgrade
+    expect(totalQty(queued.inventory, 'resource')).toBe(totalQty(ship.inventory, 'resource') - upgrade.level); // cost at queue time
+    const n = (await crewTasks(page)).find((t) => t.type === 'SHIP_UPGRADE')!.remaining; // N = the team's live duration (Task 6/8)
+
+    // The ticks: the level-up lands on the Nth one.
+    for (let k = 1; k <= n; k++) await tickTo(page, ship.turn + k);
+
+    const after = (await (await page.request.get('/api/ship')).json()) as ShipState;
+    const row = after.systems.find((s) => s.id === upgrade.id)!;
+    expect(row.level).toBe(upgrade.level + 1);
+    expect(after.turn).toBe(ship.turn + n); // the tick, not the click, advances the counter
+
+    // The card badge flipped to the new level and the left column mirrors it — both re-fetched by
+    // the tick, not by the click.
+    await expect(card.getByText(`LV ${upgrade.level + 1}`)).toBeVisible();
+    await expect(page.getByText(`LV ${row.level} · CAP ${row.capacity}`)).toBeVisible();
+  } else {
+    const target = build!;
+    // The BUILD NEW button ARMS the action — the crew team builder mounts above the grid.
+    const card = page.getByRole('heading', { name: target.type }).locator('xpath=ancestor::div[3]');
+    await expect(card.getByRole('button', { name: 'BUILD NEW' })).toBeEnabled();
+    await card.getByRole('button', { name: 'BUILD NEW' }).click();
+
+    // Dispatch — the POST only QUEUES the build: 200, no turn bump, the flat 3-parts cost already
+    // deducted, the system NOT yet built.
+    const res = await dispatchDefaultCrew(page, '/api/ship/build');
+    expect(res.status()).toBe(200);
+    const queued = (await res.json()) as ShipState;
+    expect(queued.turn).toBe(ship.turn);
+    expect(queued.systems.find((s) => s.id === target.id)!.built).toBe(false); // no instant build
+    expect(totalQty(queued.inventory, 'part')).toBe(totalQty(ship.inventory, 'part') - 3); // cost at queue time
+    const n = (await crewTasks(page)).find((t) => t.type === 'SHIP_BUILD')!.remaining;
+
+    // The ticks: the build lands (OFFLINE → LV 1) on the Nth one.
+    for (let k = 1; k <= n; k++) await tickTo(page, ship.turn + k);
+
+    const after = (await (await page.request.get('/api/ship')).json()) as ShipState;
+    const row = after.systems.find((s) => s.id === target.id)!;
+    expect(row.built).toBe(true);
+    expect({ level: row.level, capacity: row.capacity }).toEqual({ level: 1, capacity: 2 });
+    expect(after.turn).toBe(ship.turn + n); // the tick, not the click, advances the counter
+
+    // The card badge flipped OFFLINE → LV 1 and the left column's online count went up.
+    await expect(card.getByText('LV 1')).toBeVisible();
+    await expect(page.getByText(`${after.systems.filter((s) => s.built).length} ONLINE`)).toBeVisible();
+  }
+});
+
+test('SKILL TREE tab researches WEAPONS SYSTEMS and unlocks the gated WEAPONS build', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
+  // Research costs two parts, building WEAPONS three — scan until the hold has five. Every
+  // scan/jump is queued with a default crew and ticked to completion (resolveAction). Parts drop on
+  // ~30% of scans, so P(<5 in 80 scans) is negligible; jumping keeps it going if a system exhausts.
+  let ship = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  let iterations = 0;
+  while (totalQty(ship.inventory, 'part') < 5 && iterations < 80) {
+    iterations++;
+    const sys = (await (await page.request.get('/api/system')).json()) as SystemState;
+    const unexplored = sys.planets.filter((p) => !p.explored);
+    if (unexplored.length > 0) {
+      await resolveAction(page, '/api/explore', { planetId: unexplored[0].id });
+    } else {
+      await jumpToFreshSystem(page); // prefer undiscovered territory — first-edge ping-pongs between exhausted systems
+    }
+    ship = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  }
+  expect(totalQty(ship.inventory, 'part')).toBeGreaterThanOrEqual(5);
+
+  await page.goto('/');
+
+  // SHIP SYSTEMS tab: BUILD NEW on WEAPONS is disabled — gated behind the unresearched tech.
+  await page.getByRole('tab', { name: 'SHIP SYSTEMS' }).click();
+  const weaponsCard = page.getByRole('heading', { name: 'WEAPONS' }).locator('xpath=ancestor::div[3]');
+  await expect(weaponsCard.getByText('REQUIRES // WEAPONS SYSTEMS')).toBeVisible();
+  await expect(weaponsCard.getByRole('button', { name: 'BUILD NEW' })).toBeDisabled();
+
+  // SKILL TREE tab: research WEAPONS SYSTEMS (two parts). The RESEARCH button ARMS the tech — the
+  // crew team builder mounts — and its DISPATCH queues the RESEARCH task: 200, no turn bump, the
+  // cost already deducted, and the card NOT yet RESEARCHED (it flips on the resolving tick).
+  await page.getByRole('tab', { name: 'SKILL TREE' }).click();
+  const techCard = page.getByRole('heading', { name: 'WEAPONS SYSTEMS' }).locator('xpath=ancestor::div[3]');
+  await expect(techCard.getByText('AVAILABLE')).toBeVisible(); // root tech — no prerequisites
+  await expect(techCard.getByRole('button', { name: 'RESEARCH' })).toBeEnabled(); // parts ≥ 2
+  const turnBefore = ship.turn;
+  await techCard.getByRole('button', { name: 'RESEARCH' }).click();
+  const res = await dispatchDefaultCrew(page, '/api/research');
+  expect(res.status()).toBe(200);
+  const queuedTechs = (await res.json()) as { id: number; slug: string; state: string }[];
+  expect(queuedTechs.find((t) => t.slug === 'WEAPONS_SYSTEMS')!.state).toBe('AVAILABLE'); // no instant flip
+  // The research response is a bare TechDto[] — the cost deduction is checked on the ship snapshot.
+  const queuedShip = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  expect(queuedShip.turn).toBe(turnBefore);
+  expect(totalQty(queuedShip.inventory, 'part')).toBe(totalQty(ship.inventory, 'part') - 2); // cost at queue time
+  const n = (await crewTasks(page)).find((t) => t.type === 'RESEARCH')!.remaining;
+
+  // The ticks: the tech flips RESEARCHED (and unlocks the gated build) on the Nth one.
+  for (let k = 1; k <= n; k++) await tickTo(page, turnBefore + k);
+  await expect(techCard.getByText('RESEARCHED')).toBeVisible(); // the card flips on the resolving tick
+  const afterResearch = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  expect(afterResearch.turn).toBe(turnBefore + n); // the tick, not the click, advances the counter
+
+  // The gated ship action is now available: BUILD NEW on WEAPONS flips to enabled and ARMS the build.
+  await page.getByRole('tab', { name: 'SHIP SYSTEMS' }).click();
+  await expect(weaponsCard.getByRole('button', { name: 'BUILD NEW' })).toBeEnabled();
+  await weaponsCard.getByRole('button', { name: 'BUILD NEW' }).click();
+
+  // Dispatch the build — again queue, not instant: 200, no turn bump, still OFFLINE, cost deducted.
+  const buildRes = await dispatchDefaultCrew(page, '/api/ship/build');
+  expect(buildRes.status()).toBe(200);
+  const queuedBuild = (await buildRes.json()) as ShipState;
+  expect(queuedBuild.turn).toBe(afterResearch.turn);
+  expect(queuedBuild.systems.find((s) => s.type === 'WEAPONS')!.built).toBe(false); // no instant build
+  expect(totalQty(queuedBuild.inventory, 'part')).toBe(totalQty(afterResearch.inventory, 'part') - 3); // cost at queue time
+  const n2 = (await crewTasks(page)).find((t) => t.type === 'SHIP_BUILD')!.remaining;
+
+  // The ticks: WEAPONS comes online (OFFLINE → LV 1) on the Nth one.
+  for (let k = 1; k <= n2; k++) await tickTo(page, afterResearch.turn + k);
+
+  const afterBuild = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  expect(afterBuild.systems.find((s) => s.type === 'WEAPONS')!.built).toBe(true);
+  expect(afterBuild.turn).toBe(afterResearch.turn + n2);
+  await expect(weaponsCard.getByText('LV 1')).toBeVisible();
+});
+
+test('NAVIGATION AI research unlocks two-hop jumps on the world map (#35)', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
+  // Research costs two resources (70% of scans drop one), so a short scan loop makes it affordable;
+  // jumping keeps it going if a system exhausts. Idempotent: a retry finds it already RESEARCHED.
+  let techs = (await (await page.request.get('/api/tech')).json()) as { id: number; slug: string; state: string }[];
+  const navAiState = () => techs.find((t) => t.slug === 'NAV_AI')!.state;
+  if (navAiState() !== 'RESEARCHED') {
+    // Every scan/jump is queued with a default crew and ticked to completion (resolveAction).
+    let ship = (await (await page.request.get('/api/ship')).json()) as ShipState;
+    let iterations = 0;
+    while (totalQty(ship.inventory, 'resource') < 2 && iterations < 40) {
+      iterations++;
+      const sys = (await (await page.request.get('/api/system')).json()) as SystemState;
+      const unexplored = sys.planets.filter((p) => !p.explored);
+      if (unexplored.length > 0) {
+        await resolveAction(page, '/api/explore', { planetId: unexplored[0].id });
+      } else {
+        await jumpToFreshSystem(page); // prefer undiscovered territory — first-edge ping-pongs between exhausted systems
+      }
+      ship = (await (await page.request.get('/api/ship')).json()) as ShipState;
+    }
+    expect(totalQty(ship.inventory, 'resource')).toBeGreaterThanOrEqual(2);
+
+    await page.goto('/');
+    // SKILL TREE tab: research NAVIGATION AI (two resources). The RESEARCH button ARMS the tech —
+    // the crew team builder mounts — and its DISPATCH queues the RESEARCH task: 200, no turn bump,
+    // the cost already deducted, and the card NOT yet RESEARCHED.
+    await page.getByRole('tab', { name: 'SKILL TREE' }).click();
+    const techCard = page.getByRole('heading', { name: 'NAVIGATION AI' }).locator('xpath=ancestor::div[3]');
+    await expect(techCard.getByText('AVAILABLE')).toBeVisible(); // root tech — no prerequisites
+    await expect(techCard.getByRole('button', { name: 'RESEARCH' })).toBeEnabled(); // resources ≥ 2
+    await techCard.getByRole('button', { name: 'RESEARCH' }).click();
+    const res = await dispatchDefaultCrew(page, '/api/research');
+    expect(res.status()).toBe(200);
+    const queuedTechs = (await res.json()) as { id: number; slug: string; state: string }[];
+    expect(queuedTechs.find((t) => t.slug === 'NAV_AI')!.state).toBe('AVAILABLE'); // no instant flip
+    const queuedShip = (await (await page.request.get('/api/ship')).json()) as ShipState;
+    expect(queuedShip.turn).toBe(ship.turn);
+    expect(totalQty(queuedShip.inventory, 'resource')).toBe(totalQty(ship.inventory, 'resource') - 2); // cost at queue time
+    const n = (await crewTasks(page)).find((t) => t.type === 'RESEARCH')!.remaining;
+
+    // The ticks: the card flips RESEARCHED on the Nth one (the unlock lands with it).
+    for (let k = 1; k <= n; k++) await tickTo(page, ship.turn + k);
+    await expect(techCard.getByText('RESEARCHED')).toBeVisible();
+  }
+
+  // Pick a system exactly two hops from the current one. A completely fresh save has none (the start
+  // region is only one hop deep), so jump once first — that expansion creates the two-hop territory.
+  let world = (await (await page.request.get('/api/world')).json()) as WorldState;
+  const findTwoHop = () => {
+    const currentId = world.systems.find((s) => s.current)!.id;
+    return world.systems.find((s) => shortestJumpPath(currentId, s.id, world.edges).length === 2);
+  };
+  let guard = 0;
+  while (!findTwoHop() && guard < 5) {
+    await jumpToFreshSystem(page); // +1 turn — jumping into undiscovered territory always expands the chart
+    world = (await (await page.request.get('/api/world')).json()) as WorldState;
+    guard++;
+  }
+  const target = findTwoHop()!;
+  expect(target).toBeDefined();
+
+  await page.goto('/'); // fresh chart with NAV AI researched — two-hop fields are clickable now
+  // #27 restores whatever tab a previous step persisted (SKILL TREE after the research above), so
+  // activate WORLD MAP explicitly before asserting on the chart.
+  await page.getByRole('tab', { name: 'WORLD MAP' }).click();
+  await expect(page.getByText(/GALACTIC CHART \/\/ JUMP ROUTES — TURN \d+/)).toBeVisible();
+  const panel = page.getByRole('tabpanel');
+  const turnBefore = world.turn;
+
+  // The two-hop systems render as distinct chart fields (// JUMP ×2 sublabel) — several at once, so .first().
+  await expect(panel.getByText(/(DISCOVERED|UNKNOWN) \/\/ JUMP ×2/).first()).toBeVisible();
+  // Click the target's chart field — it ARMS the node: the crew team builder floats over the chart.
+  await panel.getByRole('button', { name: target.name.toUpperCase() }).click();
+
+  // Dispatch with the default one-person crew — the POST only QUEUES the two-hop jump: 200, no
+  // turn bump, no landing yet (the origin is still `current` in the queue response).
+  const res = await dispatchDefaultCrew(page, '/api/jump');
+  expect(res.status()).toBe(200);
+  const queued = (await res.json()) as WorldState;
+  expect(queued.turn).toBe(turnBefore);
+  expect(queued.systems.find((s) => s.current)?.id).toBe(world.systems.find((s) => s.current)!.id); // no instant landing
+  // The hop count now feeds the duration model, not a flat turn delta: N is the team's live
+  // duration for a two-hop jump (the route puts the hop count in the queued payload).
+  const n = queued.tasks.find((t) => t.type === 'JUMP')!.remaining;
+
+  // The ticks: the counter advances one per tick, and the jump lands on the Nth one.
+  for (let k = 1; k <= n; k++) await tickTo(page, turnBefore + k);
+
+  const after = (await (await page.request.get('/api/world')).json()) as WorldState;
+  expect(after.systems.find((s) => s.id === target.id)!.current).toBe(true); // the jump landed on the Nth tick
+  expect(after.turn).toBe(turnBefore + n); // the hop count scaled the duration, not a flat +2 (#35)
+});
+
+test('MISSIONS tab accepts a contract and completing it grants the reward', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
+  const board = (await (await page.request.get('/api/missions')).json()) as MissionDto[];
+  expect(board.filter((m) => m.state === 'AVAILABLE').length).toBeGreaterThanOrEqual(3); // the board is always topped up
+
+  await page.goto('/');
+  await page.getByRole('tab', { name: 'MISSIONS' }).click();
+  const acceptButtons = page.getByRole('button', { name: 'ACCEPT' });
+  const panel = page.getByRole('tabpanel');
+
+  // Idempotent across retries sharing a DB: if a previous attempt already accepted a mission, it's still
+  // ACTIVE and every ACCEPT button is disabled — complete that one instead of accepting again.
+  const leftover = board.find((m) => m.state === 'ACTIVE');
+  let picked: MissionDto;
+
+  if (leftover) {
+    picked = leftover;
+    // No exact match — ACTIVE badges render a "●" dot prefix (components/ui/badge.tsx), so their text is "●ACTIVE".
+    await expect(panel.getByText('ACTIVE')).toBeVisible();
+    for (const button of await acceptButtons.all()) {
+      await expect(button).toBeDisabled();
+    }
+  } else {
+    // Prefer a scan-completable contract — fresh boards are all EXPLORE/FIND (DELIVER only appears once systems are discovered).
+    picked = board.find((m) => m.state === 'AVAILABLE' && m.type !== 'DELIVER') ?? board.find((m) => m.state === 'AVAILABLE')!;
+    const idx = board.indexOf(picked);
+
+    // One ACCEPT button per card, in board order — the picked contract's is enabled (AVAILABLE, nothing active).
+    await expect(acceptButtons.nth(idx)).toBeEnabled();
+    // Accepting is the one action in the suite that does NOT queue (JC-19): no crew params, and no
+    // turn bump — the turn counter only ever moves on a NEXT TURN tick.
+    const worldBefore = (await (await page.request.get('/api/world')).json()) as WorldState;
+    await acceptButtons.nth(idx).click();
+    const worldAfter = (await (await page.request.get('/api/world')).json()) as WorldState;
+    expect(worldAfter.turn).toBe(worldBefore.turn); // JC-19 — accept is free, it does not tick
+
+    // UI flipped: exactly one ACTIVE badge on the board and the accepted card's button is now disabled.
+    // No exact match — ACTIVE badges render a "●" dot prefix (components/ui/badge.tsx), so their text is "●ACTIVE".
+    await expect(panel.getByText('ACTIVE')).toBeVisible();
+    await expect(acceptButtons.nth(idx)).toBeDisabled();
+
+    // API confirms it: exactly one ACTIVE mission, the picked one.
+    const boardAfterAccept = (await (await page.request.get('/api/missions')).json()) as MissionDto[];
+    expect(boardAfterAccept.filter((m) => m.state === 'ACTIVE')).toEqual([boardAfterAccept.find((m) => m.id === picked.id)!]);
+  }
+
+  // Baseline of the reward kind in the hold — scans during completion may add more, so assert >=.
+  const shipBefore = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  const baseline = totalQty(shipBefore.inventory, picked.rewardKind);
+
+  // Complete it. Every scan/jump is queued with a default crew and ticked to completion
+  // (resolveAction) — the mission hooks run on the resolving ticks. EXPLORE/FIND: scan until done,
+  // jumping when a system exhausts (parts drop on ~30% of scans, so P(a FIND-part misses in 80
+  // scans) ≈ 0.7^80 — negligible). DELIVER: follow the shortest jump path to its target (edges
+  // only ever get added, so the precomputed path stays valid).
+  let deliverPath: number[] = [];
+  if (picked.type === 'DELIVER') {
+    const worldNow = (await (await page.request.get('/api/world')).json()) as WorldState;
+    deliverPath = shortestJumpPath(worldNow.systems.find((s) => s.current)!.id, picked.targetSystemId!, worldNow.edges);
+  }
+
+  let state = 'ACTIVE';
+  let iterations = 0;
+  while (state !== 'DONE' && iterations < 80) {
+    iterations++;
+    if (deliverPath.length > 0) {
+      await resolveAction(page, '/api/jump', { systemId: deliverPath.shift()! });
+    } else {
+      const sys = (await (await page.request.get('/api/system')).json()) as SystemState;
+      const unexplored = sys.planets.filter((p) => !p.explored);
+      if (unexplored.length > 0) {
+        await resolveAction(page, '/api/explore', { planetId: unexplored[0].id });
+      } else {
+        await jumpToFreshSystem(page); // prefer undiscovered territory — first-edge ping-pongs between exhausted systems
+      }
+    }
+    state = ((await (await page.request.get('/api/missions')).json()) as MissionDto[]).find((m) => m.id === picked.id)?.state ?? 'ACTIVE';
+  }
+  expect(state).toBe('DONE'); // the bounded loop always completes: scans are plentiful, jump paths finite
+
+  const shipAfter = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  expect(totalQty(shipAfter.inventory, picked.rewardKind)).toBeGreaterThanOrEqual(baseline + picked.rewardQty);
+});
+
+test('EVENT LOG tab shows real game events, newest first', async ({ page }) => {
+  await drainQueue(page); // retry-safety: a failed earlier attempt may have left a row queued (an in-transit JUMP would 409 every new queue)
+  // Idempotent across retries sharing a DB: assert on THIS run's own entries (identified by turn and
+  // message), never on absolute counts — earlier attempts leave their events behind.
+  // The jump is queued + ticked to completion: the event it writes carries the tick it RESOLVED
+  // on, not the turn of the queueing POST.
+  const afterJump = await jumpToFreshSystem(page);
+  const jumpedName = afterJump.systems.find((s) => s.current)!.name;
+  const jumpTurn = afterJump.turn; // the resolution tick's turn
+
+  // Scan one body — if the current system is exhausted (leftover from a previous attempt), hop again first.
+  let sys = (await (await page.request.get('/api/system')).json()) as SystemState;
+  if (!sys.planets.some((p) => !p.explored)) {
+    await jumpToFreshSystem(page); // fresh systems always have unscanned bodies
+    sys = (await (await page.request.get('/api/system')).json()) as SystemState;
+  }
+  const planet = sys.planets.find((p) => !p.explored)!;
+  // The explore POST only queues — no turn bump, no event yet — so tick it to completion: the scan
+  // event lands on the resolving tick, and the post-tick /api/system snapshot carries that turn.
+  const explored = (await resolveAction(page, '/api/explore', { planetId: planet.id })) as SystemState;
+  const exploreTurn = explored.turn;
+
+  // API: this run's jump + scan are in the log, each stamped with the tick it resolved on, and the
+  // newer one (the scan) comes first.
+  const events = (await (await page.request.get('/api/events')).json()) as EventDto[];
+  const exploreEvent = events.find((e) => e.turn === exploreTurn && e.type === 'explore');
+  expect(exploreEvent?.message).toMatch(new RegExp(`^Explored ${planet.name} — found`));
+  const jumpEvent = events.find((e) => e.type === 'jump' && e.message === `Jumped to ${jumpedName}`);
+  expect(jumpEvent).toBeDefined(); // system names are unique, so the message pins this run's jump
+  expect(events.indexOf(exploreEvent!)).toBeLessThan(events.indexOf(jumpEvent!));
+
+  // UI: the terminal renders both lines (T<turn> // <MESSAGE>, uppercased) with the resolution turns.
+  await page.goto('/');
+  await page.getByRole('tab', { name: 'EVENT LOG' }).click();
+  const panel = page.getByRole('tabpanel');
+  await expect(panel.getByText(new RegExp(`T${exploreTurn} // EXPLORED ${planet.name.toUpperCase()}`))).toBeVisible();
+  await expect(panel.getByText(new RegExp(`T${jumpTurn} // JUMPED TO ${jumpedName.toUpperCase()}`))).toBeVisible();
+});
+
 test('GET /api/version reports the app version as JSON', async ({ page }) => {
   const res = await page.request.get('/api/version');
   expect(res.status()).toBe(200);
@@ -126,3 +737,270 @@ test('GET /api/version reports the app version as JSON', async ({ page }) => {
   const body = (await res.json()) as { version: string };
   expect(body.version).toMatch(/^\d+\.\d+\.\d+$/);
 });
+
+// --- The new queue + tick model scenarios (Task 10 / #44) -------------------------------
+// All five start from a clean queue (drainQueue): the CI DB persists across retries, and a
+// failed earlier attempt can leave an ACTIVE / PENDING row — or an in-transit JUMP — behind.
+// Every duration below is read live from the queue responses (the team builder's value, Task 8),
+// never hard-coded, and every tick goes through the raw POST /api/turn — the only turn bump.
+
+// The full queue row keyed by id — the same array the Task 9 strip renders (ACTIVE block first,
+// then PENDING; DONE rows are filtered out of the snapshots, so only ACTIVE/PENDING appear).
+interface QueueTaskRow { id: number; type: string; status: string; remaining: number }
+// World / system snapshot views carrying that full row shape (the top-level DTOs keep the minimal
+// {type, remaining} subset the reworked tests read).
+interface WorldStateQ { systems: WorldSystemDto[]; edges: [number, number][]; turn: number; tasks: QueueTaskRow[] }
+interface SystemStateQ { systemId: number; systemName: string; planets: PlanetDto[]; inventory: InventoryItemDto[]; turn: number; tasks: QueueTaskRow[] }
+
+// One POST /api/turn (no body) — the only thing that advances the turn counter.
+const tickOnce = async (page: Page) => {
+  expect((await page.request.post('/api/turn')).status()).toBe(200);
+};
+
+test('queueing a one-person JUMP leaves the ship in the origin until its Nth tick (#44)', async ({ page }) => {
+  await drainQueue(page);
+  const world = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  const currentId = world.systems.find((s) => s.current)!.id;
+  const edge = world.edges.find(([a, b]) => a === currentId || b === currentId)!;
+  const targetId = edge[0] === currentId ? edge[1] : edge[0];
+  const T = world.turn;
+  const { crew } = (await (await page.request.get('/api/crew')).json()) as { crew: CrewDto[]; tasks: QueueTaskDto[] };
+  expect(crew.length).toBeGreaterThanOrEqual(2);
+
+  // The queue POST: 200, no turn bump, no landing — the free member starts the JUMP ACTIVE at once.
+  const res = await page.request.post('/api/jump', { data: { systemId: targetId, leadCrewId: crew[0].id, helperCrewIds: [] } });
+  expect(res.status()).toBe(200);
+  const queued = (await res.json()) as WorldStateQ;
+  expect(queued.turn).toBe(T);
+  expect(queued.systems.find((s) => s.current)?.id).toBe(currentId); // unchanged immediately after the queue POST
+  const n = queued.tasks.find((t) => t.type === 'JUMP')!.remaining; // N = the team's live duration (Task 6/8)
+  expect(queued.tasks.find((t) => t.type === 'JUMP')!.status).toBe('ACTIVE');
+
+  // N-1 ticks: still in transit — remaining 1, the origin still current.
+  for (let k = 0; k < n - 1; k++) await tickOnce(page);
+  const mid = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  expect(mid.turn).toBe(T + n - 1);
+  expect(mid.systems.find((s) => s.current)?.id).toBe(currentId); // unchanged after N-1 ticks
+  expect(mid.tasks.find((t) => t.type === 'JUMP')!.remaining).toBe(1);
+
+  // The Nth tick lands the jump.
+  await tickOnce(page);
+  const after = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  expect(after.turn).toBe(T + n);
+  expect(after.systems.find((s) => s.current)?.id).toBe(targetId); // changed exactly on the Nth tick
+  expect(after.tasks.some((t) => t.type === 'JUMP')).toBe(false); // resolved rows are filtered out
+});
+
+test('a JUMP and a disjoint-crew EXPLORE run in parallel and resolve at their own durations (#44)', async ({ page }) => {
+  await drainQueue(page);
+  const { crew } = (await (await page.request.get('/api/crew')).json()) as { crew: CrewDto[]; tasks: QueueTaskDto[] };
+  expect(crew.length).toBeGreaterThanOrEqual(2); // disjoint one-person teams
+
+  // The explore's body: an unexplored planet in the current system. A jump's fallback target can
+  // be a fully-explored system (jumpToFreshSystem prefers undiscovered, not unexplored), so loop
+  // like the other preambles instead of a single if.
+  let sys = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+  for (let guard = 0; !sys.planets.some((p) => !p.explored) && guard < 10; guard++) {
+    await jumpToFreshSystem(page);
+    sys = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+  }
+  const planet = sys.planets.find((p) => !p.explored)!;
+  expect(planet).toBeDefined(); // the world keeps producing fresh unscanned bodies
+
+  const world = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  const currentId = world.systems.find((s) => s.current)!.id;
+  const edge = world.edges.find(([a, b]) => a === currentId || b === currentId)!;
+  const targetId = edge[0] === currentId ? edge[1] : edge[0];
+  const targetName = world.systems.find((s) => s.id === targetId)!.name;
+  const T = world.turn;
+
+  // Mandated order (JC-17): the EXPLORE is queued FIRST — while a JUMP is ACTIVE no new task of any
+  // type may be queued, so a jump-first order would 409 the explore. Both crews are free, so both
+  // tasks start ACTIVE immediately and run in parallel, with no interleaving clicks.
+  const expRes = await page.request.post('/api/explore', { data: { planetId: planet.id, leadCrewId: crew[1].id, helperCrewIds: [] } });
+  expect(expRes.status()).toBe(200);
+  const expQ = (await expRes.json()) as SystemStateQ;
+  expect(expQ.turn).toBe(T);
+  const nExp = expQ.tasks.find((t) => t.type === 'EXPLORE')!.remaining;
+  expect(expQ.tasks.find((t) => t.type === 'EXPLORE')!.status).toBe('ACTIVE');
+
+  const jmpRes = await page.request.post('/api/jump', { data: { systemId: targetId, leadCrewId: crew[0].id, helperCrewIds: [] } });
+  expect(jmpRes.status()).toBe(200); // legal even while the non-jump explore is ACTIVE
+  const jmpQ = (await jmpRes.json()) as WorldStateQ;
+  expect(jmpQ.turn).toBe(T);
+  const nJmp = jmpQ.tasks.find((t) => t.type === 'JUMP')!.remaining;
+  expect(jmpQ.tasks.find((t) => t.type === 'EXPLORE')!.status).toBe('ACTIVE'); // the explore kept running
+  expect(jmpQ.tasks.find((t) => t.type === 'JUMP')!.status).toBe('ACTIVE');
+
+  const getEvents = async () => (await (await page.request.get('/api/events')).json()) as EventDto[];
+  // A planet flip and a jump are both recorded by the event log (the same records the EVENT LOG test
+  // reads), each stamped with the tick it resolved on — turn numbers are unique within a run, so the
+  // (turn, message) pair pins this run's own tasks.
+  const exploreEventAt = async (turn: number) =>
+    (await getEvents()).find((e) => e.type === 'explore' && e.turn === turn && e.message.startsWith(`Explored ${planet.name} — found`));
+  const jumpEventAt = async (turn: number) =>
+    (await getEvents()).find((e) => e.type === 'jump' && e.turn === turn && e.message === `Jumped to ${targetName}`);
+
+  if (nExp < nJmp) {
+    // The scan resolves first (tick nExp), while the ship is still in the origin — so the flip is
+    // readable directly off the current system.
+    for (let k = 0; k < nExp; k++) await tickOnce(page);
+    const mid = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+    expect(mid.turn).toBe(T + nExp);
+    expect(mid.planets.find((p) => p.id === planet.id)?.explored).toBe(true); // the scan's effect, on its own tick
+    expect(mid.tasks.some((t) => t.type === 'EXPLORE')).toBe(false);
+    expect(await exploreEventAt(T + nExp)).toBeDefined();
+    const midWorld = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+    expect(midWorld.systems.find((s) => s.current)?.id).toBe(currentId); // not landed yet
+    expect(midWorld.tasks.find((t) => t.type === 'JUMP')!.status).toBe('ACTIVE');
+    expect(midWorld.tasks.find((t) => t.type === 'JUMP')!.remaining).toBe(nJmp - nExp); // nJmp - nExp ticks left
+    for (let k = 0; k < nJmp - nExp; k++) await tickOnce(page);
+  } else if (nJmp < nExp) {
+    // The jump lands first (tick nJmp); the origin is no longer `current` (GET /api/system is
+    // current-only), so the scan's flip is proven by the event it writes on its own resolution tick.
+    for (let k = 0; k < nJmp; k++) await tickOnce(page);
+    const midWorld = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+    expect(midWorld.turn).toBe(T + nJmp);
+    expect(midWorld.systems.find((s) => s.current)?.id).toBe(targetId);
+    expect(await jumpEventAt(T + nJmp)).toBeDefined();
+    expect(midWorld.tasks.find((t) => t.type === 'EXPLORE')!.status).toBe('ACTIVE');
+    expect(midWorld.tasks.find((t) => t.type === 'EXPLORE')!.remaining).toBe(nExp - nJmp); // nExp - nJmp ticks left
+    for (let k = 0; k < nExp - nJmp; k++) await tickOnce(page);
+  } else {
+    // Equal durations: both decrement in lockstep and stay ACTIVE through every tick before the last.
+    for (let k = 1; k < nExp; k++) {
+      await tickOnce(page);
+      const midWorld = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+      expect(midWorld.tasks.find((t) => t.type === 'EXPLORE')!.remaining).toBe(nExp - k);
+      expect(midWorld.tasks.find((t) => t.type === 'JUMP')!.remaining).toBe(nExp - k);
+    }
+    // The Nth tick resolves both — the loop above covered ticks 1..N-1 only (mirrors how the other
+    // scenarios end on their resolving tick).
+    await tickOnce(page);
+  }
+
+  // Both resolved at their own durations: the jump landed, each event is stamped on its task's
+  // resolution tick, and the queue is clean again.
+  const after = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  expect(after.turn).toBe(T + Math.max(nExp, nJmp));
+  expect(after.systems.find((s) => s.current)?.id).toBe(targetId);
+  expect(after.tasks.some((t) => t.type === 'JUMP' || t.type === 'EXPLORE')).toBe(false);
+  expect(await exploreEventAt(T + nExp)).toBeDefined();
+  expect(await jumpEventAt(T + nJmp)).toBeDefined();
+});
+
+test('a second task for a member on an ACTIVE one is pre-queued PENDING and auto-starts on its tick (#44)', async ({ page }) => {
+  await drainQueue(page);
+  const { crew } = (await (await page.request.get('/api/crew')).json()) as { crew: CrewDto[]; tasks: QueueTaskDto[] };
+  expect(crew.length).toBeGreaterThanOrEqual(2);
+
+  // Two unexplored bodies in the current system; a fresh system always has them, so jump until the
+  // current one does (the bounded guard fails the test if the world ever stops producing them).
+  let sys = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+  for (let guard = 0; sys.planets.filter((p) => !p.explored).length < 2 && guard < 10; guard++) {
+    await jumpToFreshSystem(page);
+    sys = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+  }
+  const unexplored = sys.planets.filter((p) => !p.explored);
+  expect(unexplored.length).toBeGreaterThanOrEqual(2);
+  const planetA = unexplored[0]!;
+  const planetB = unexplored[1]!;
+  const T = sys.turn;
+
+  // Task 1: crew[0] is free, so the scan starts ACTIVE at once.
+  const res1 = await page.request.post('/api/explore', { data: { planetId: planetA.id, leadCrewId: crew[0].id, helperCrewIds: [] } });
+  expect(res1.status()).toBe(200);
+  const q1 = (await res1.json()) as SystemStateQ;
+  expect(q1.turn).toBe(T); // no turn bump on queue
+  const t1 = q1.tasks.find((t) => t.type === 'EXPLORE')!; // the only row — the queue was clean
+  expect(t1.status).toBe('ACTIVE');
+  const na = t1.remaining;
+
+  // Task 2, same member, a different target: a lead on an ACTIVE may chain (JC-16) — it is accepted
+  // (the member is on ACTIVE, not PENDING, and no jump is in transit) and starts PENDING.
+  const res2 = await page.request.post('/api/explore', { data: { planetId: planetB.id, leadCrewId: crew[0].id, helperCrewIds: [] } });
+  expect(res2.status()).toBe(200);
+  const q2 = (await res2.json()) as SystemStateQ;
+  expect(q2.turn).toBe(T);
+  expect(q2.tasks.find((t) => t.id === t1.id)!.status).toBe('ACTIVE');
+  const t2 = q2.tasks.find((t) => t.id !== t1.id && t.type === 'EXPLORE')!;
+  expect(t2.status).toBe('PENDING'); // the second is dimmed in the strip (Task 9) until it starts
+  const nb = t2.remaining; // its full duration — untouched until it starts
+  // The snapshot orders the ACTIVE block before the PENDING block (Task 6).
+  expect(q2.tasks.findIndex((t) => t.id === t1.id)).toBeLessThan(q2.tasks.findIndex((t) => t.id === t2.id));
+
+  // Tick until task 1 resolves — a loop keyed on its specific id (resolveAction's find-by-type would
+  // grab the earliest same-type row, which is the ambiguity two same-type rows create).
+  for (let k = 1; k < na; k++) {
+    await tickOnce(page);
+    const snap = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+    expect(snap.tasks.find((t) => t.id === t1.id)!.remaining).toBe(na - k); // the ACTIVE row decrements
+    expect(snap.tasks.find((t) => t.id === t2.id)!.status).toBe('PENDING'); // the second keeps waiting
+  }
+  // The na-th tick: task 1 resolves (filtered out of the snapshot), and task 2 auto-starts on that
+  // same tick — ACTIVE with its FULL remaining (the first decrement lands on the next tick).
+  await tickOnce(page);
+  const done = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+  expect(done.tasks.some((t) => t.id === t1.id)).toBe(false);
+  expect(done.tasks.find((t) => t.id === t2.id)!.status).toBe('ACTIVE');
+  expect(done.tasks.find((t) => t.id === t2.id)!.remaining).toBe(nb);
+
+  // Leave the queue clean for the next scenario: tick task 2 to completion.
+  for (let k = 0; k < nb; k++) await tickOnce(page);
+  const clean = (await (await page.request.get('/api/system')).json()) as SystemStateQ;
+  expect(clean.tasks.length).toBe(0);
+});
+
+test('queueing a second JUMP while one is in transit is refused 409 (#44)', async ({ page }) => {
+  await drainQueue(page);
+  const world = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  const currentId = world.systems.find((s) => s.current)!.id;
+  const edge = world.edges.find(([a, b]) => a === currentId || b === currentId)!;
+  const targetId = edge[0] === currentId ? edge[1] : edge[0];
+  const T = world.turn;
+  const { crew } = (await (await page.request.get('/api/crew')).json()) as { crew: CrewDto[]; tasks: QueueTaskDto[] };
+  expect(crew.length).toBeGreaterThanOrEqual(2);
+
+  const res = await page.request.post('/api/jump', { data: { systemId: targetId, leadCrewId: crew[0].id, helperCrewIds: [] } });
+  expect(res.status()).toBe(200);
+  const queued = (await res.json()) as WorldStateQ;
+  expect(queued.turn).toBe(T);
+  expect(queued.tasks.find((t) => t.type === 'JUMP')!.status).toBe('ACTIVE'); // in transit — and deliberately not ticked
+
+  // A second JUMP while the first is in transit — a different, free member, so the 409 is the
+  // global in-transit rule ("a jump is in transit — no new tasks can be queued" / "a jump is
+  // already queued"), not crew availability. (The UI variant and the full 409 matrix are
+  // unit-covered by Task 3 — this single API case is what e2e carries.)
+  const second = await page.request.post('/api/jump', { data: { systemId: targetId, leadCrewId: crew[1].id, helperCrewIds: [] } });
+  expect(second.status()).toBe(409);
+  expect(await second.text()).toMatch(/jump/i);
+
+  // The first is still in transit, untouched by the refused queue.
+  const still = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  expect(still.turn).toBe(T);
+  expect(still.systems.find((s) => s.current)?.id).toBe(currentId);
+  expect(still.tasks.find((t) => t.type === 'JUMP')!.status).toBe('ACTIVE');
+  // The jump is left in transit on purpose (the scenario is about the blocked queue); the next
+  // scenario's drainQueue ticks it out before its empty-queue precondition.
+});
+
+test('NEXT TURN with an empty queue is a free skip — +1 turn, the strip stays hidden (#44)', async ({ page }) => {
+  await drainQueue(page);
+  const world = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  expect(world.tasks.length).toBe(0); // the precondition: nothing queued
+  const T = world.turn;
+
+  await page.goto('/');
+  // The button's live counter shows the current turn; with an empty queue the strip renders nothing.
+  await expect(page.getByText(`TURN ${T}`, { exact: true })).toBeVisible();
+  await expect(page.getByText('ACTIVE TASKS', { exact: true })).toHaveCount(0);
+
+  await page.getByRole('button', { name: 'NEXT TURN' }).click();
+  await expect(page.getByText(`TURN ${T + 1}`, { exact: true })).toBeVisible(); // the click is a real tick
+  await expect(page.getByText('ACTIVE TASKS', { exact: true })).toHaveCount(0); // a free skip queues no task
+
+  // API confirms the model: the turn advanced by exactly one and the queue is still empty.
+  const after = (await (await page.request.get('/api/world')).json()) as WorldStateQ;
+  expect(after.turn).toBe(T + 1);
+  expect(after.tasks.length).toBe(0);
+});

e2e/state.spec.ts

@@ -1,6 +1,7 @@
 import { execSync } from 'node:child_process';
 import path from 'node:path';
 import { expect, test } from '@playwright/test';
+import { drainQueue, jumpToFreshSystem, resolveAction } from './helpers';
 
 // Repo root — docker-compose.yml lives here; `docker compose restart` runs on
 // this host (the test runner), browsers stay remote. CI points E2E_COMPOSE_ARGS at the
@@ -8,15 +9,28 @@ import { expect, test } from '@playwright/test';
 const repoRoot = path.join(__dirname, '..');
 const composeArgs = process.env.E2E_COMPOSE_ARGS ?? '';
 
-// Mirrors the /api/world + /api/system response shapes (lib/game/save.ts) — kept local so the spec stays self-contained.
-interface WorldSystemDto { id: number; name: string; x: number; y: number; discovered: boolean; current: boolean }
-interface WorldState { systems: WorldSystemDto[]; edges: [number, number][]; turn: number }
+// Mirrors the /api/system response shape (lib/game/save.ts) — kept local so the spec stays self-contained.
 interface PlanetDto { id: number; name: string; type: string; hazard: boolean; explored: boolean; parent: number | null }
 interface SystemState { systemId: number; systemName: string; planets: PlanetDto[]; inventory: { kind: string; name: string; qty: number }[]; turn: number }
+interface CrewDto { id: number; name: string; role: string; traitGood: string; traitBad: string; origin: string }
+// Mirrors the QueueDto of lib/game/save.ts — GET /api/crew is the {crew, tasks} object (Task 6 /
+// JC-7): the queue's display shape (resolved names, no raw payload), ACTIVE block first, then
+// PENDING, DONE filtered.
+interface TaskDto { id: number; type: string; targetLabel: string; leadName: string; helperNames: string[]; remaining: number; status: string; leadCrewId: number; helperCrewIds: number[] }
+interface CrewState { crew: CrewDto[]; tasks: TaskDto[] }
+interface ShipSystemDto { id: number; type: string; level: number; capacity: number; built: boolean }
+interface ShipState { systems: ShipSystemDto[]; inventory: { kind: string; name: string; qty: number }[]; turn: number }
+interface TechDto { id: number; slug: string; name: string; costKind: string; costQty: number; prereqs: string[]; effect: string; state: string; missingPrereqs: string[] }
+interface MissionDto { id: number; type: string; description: string; targetSystemId: number | null; conditionKind: string | null; progressTarget: number; progress: number; rewardKind: string; rewardQty: number; state: string }
+interface EventDto { id: number; turn: number; type: string; message: string; createdAt: string }
 
 test('app survives a container restart (stack + volume persistence)', async ({ page }) => {
   test.setTimeout(180_000);
 
+  // Retry-safety: a failed earlier attempt may have left a row queued — an in-transit JUMP would
+  // 409 every new queue (lib/game/tasks.ts's in-transit rule), so drain before the baselines.
+  await drainQueue(page);
+
   // Baseline: the app serves and reports its version.
   const resBefore = await page.request.get('/api/version');
   expect(resBefore.status()).toBe(200);
@@ -24,28 +38,43 @@ test('app survives a container restart (stack + volume persistence)', async ({ p
   expect(before.version).toMatch(/^\d+\.\d+\.\d+$/);
 
   // Game-state baseline: jump once so there is real progress that must survive the restart.
-  const worldBefore = (await (await page.request.get('/api/world')).json()) as WorldState;
-  const currentId = worldBefore.systems.find((s) => s.current)!.id;
-  const edge = worldBefore.edges.find(([a, b]) => a === currentId || b === currentId)!;
-  const targetId = edge[0] === currentId ? edge[1] : edge[0];
-  const jumpRes = await page.request.post('/api/jump', { data: { systemId: targetId } });
-  expect(jumpRes.status()).toBe(200);
+  await jumpToFreshSystem(page);
 
   // Exploration baseline: scan one body so explored state + inventory must survive too.
   // (Earlier specs may have exhausted the current system, so jump until an unscanned body shows up.)
   let sysBefore = (await (await page.request.get('/api/system')).json()) as SystemState;
   for (let i = 0; !sysBefore.planets.some((p) => !p.explored) && i < 20; i++) {
-    const world = (await (await page.request.get('/api/world')).json()) as WorldState;
-    const curId = world.systems.find((s) => s.current)!.id;
-    const e = world.edges.find(([a, b]) => a === curId || b === curId)!;
-    const tId = e[0] === curId ? e[1] : e[0];
-    expect((await page.request.post('/api/jump', { data: { systemId: tId } })).status()).toBe(200);
+    await jumpToFreshSystem(page); // prefer undiscovered territory — first-edge ping-pongs between exhausted systems
     sysBefore = (await (await page.request.get('/api/system')).json()) as SystemState;
   }
   const targetPlanet = sysBefore.planets.find((p) => !p.explored)!;
-  const exploreRes = await page.request.post('/api/explore', { data: { planetId: targetPlanet.id } });
-  expect(exploreRes.status()).toBe(200);
-  const sysExplored = (await exploreRes.json()) as SystemState;
+  // The explore POST only queues — no turn bump, explored not yet flipped — so tick it to
+  // completion and re-derive the baseline from the post-tick /api/system snapshot: the turn it
+  // pins (compared after the restart) must be the resolved one, not the queue's.
+  const sysExplored = (await resolveAction(page, '/api/explore', { planetId: targetPlanet.id })) as SystemState;
+  expect(sysExplored.planets.find((p) => p.id === targetPlanet.id)?.explored).toBe(true); // the scan resolved before the baseline is pinned
+
+  // Crew baseline: the roster (starting crew + any finds so far) must survive too.
+  const crewBefore = (await (await page.request.get('/api/crew')).json()) as CrewState;
+  expect(crewBefore.crew.length).toBeGreaterThanOrEqual(2); // starting crew is always seeded
+
+  // Ship baseline: the systems (levels/capacities) + cargo hold must survive too.
+  const shipBefore = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  expect(shipBefore.systems.length).toBeGreaterThan(0); // starting ship is always seeded
+
+  // Tech baseline: the researched flags must survive too.
+  const techBefore = (await (await page.request.get('/api/tech')).json()) as TechDto[];
+  expect(techBefore.length).toBeGreaterThan(0); // the tech tree is always seeded
+
+  // Mission board baseline: contracts, states and progress must survive too. The GET tops the board
+  // up first — a no-op here because every action leaves at least MIN_AVAILABLE AVAILABLE contracts.
+  const missionsBefore = (await (await page.request.get('/api/missions')).json()) as MissionDto[];
+  expect(missionsBefore.length).toBeGreaterThan(0); // the board is always seeded on new game
+
+  // Event log baseline: append-only, and nothing writes between this snapshot and the restart — so the
+  // latest lines must come back byte-identical (ids included) after it.
+  const eventsBefore = (await (await page.request.get('/api/events?limit=5')).json()) as EventDto[];
+  expect(eventsBefore.length).toBeGreaterThan(0);
 
   // Restart the app container mid-run — the named DB volume must survive it.
   execSync(`docker compose ${composeArgs} restart space-wanderer`, { cwd: repoRoot, stdio: 'pipe' });
@@ -68,7 +97,7 @@ test('app survives a container restart (stack + volume persistence)', async ({ p
   expect(after!.version).toBe(before.version); // same build, not a re-seeded stack
 
   // Game state survived: same turn counter and current system as before the restart.
-  const worldAfter = (await (await page.request.get('/api/world')).json()) as WorldState;
+  const worldAfter = (await (await page.request.get('/api/world')).json()) as { turn: number; systems: { id: number; current: boolean }[] };
   expect(worldAfter.turn).toBe(sysExplored.turn);
   expect(worldAfter.systems.find((s) => s.current)?.id).toBe(sysExplored.systemId);
 
@@ -77,6 +106,27 @@ test('app survives a container restart (stack + volume persistence)', async ({ p
   expect(sysAfter.turn).toBe(sysExplored.turn);
   expect(sysAfter.planets.find((p) => p.id === targetPlanet.id)?.explored).toBe(true);
 
+  // Crew roster survived too: same members, traits and origins (no re-seed on restart). The
+  // {crew, tasks} object shape (JC-7) means the still-queued task rows survive with it too.
+  const crewAfter = (await (await page.request.get('/api/crew')).json()) as CrewState;
+  expect(crewAfter).toEqual(crewBefore);
+
+  // Ship state survived too: same systems, levels/capacities and cargo hold.
+  const shipAfter = (await (await page.request.get('/api/ship')).json()) as ShipState;
+  expect(shipAfter).toEqual(shipBefore);
+
+  // Tech tree survived too: same researched flags (no re-seed on restart).
+  const techAfter = (await (await page.request.get('/api/tech')).json()) as TechDto[];
+  expect(techAfter).toEqual(techBefore);
+
+  // Mission board survived too: same contracts, states and progress (no re-seed or re-top-up on restart).
+  const missionsAfter = (await (await page.request.get('/api/missions')).json()) as MissionDto[];
+  expect(missionsAfter).toEqual(missionsBefore);
+
+  // Event log survived too: same latest lines, in the same order.
+  const eventsAfter = (await (await page.request.get('/api/events?limit=5')).json()) as EventDto[];
+  expect(eventsAfter).toEqual(eventsBefore);
+
   // The page itself serves again with the landing title.
   await page.goto('/');
   await expect(page.getByRole('heading', { name: 'SpaceWanderer' })).toBeVisible();

lib/db/admin.test.ts

@@ -0,0 +1,128 @@
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { getTableName } from 'drizzle-orm'
+import { afterAll, describe, expect, it } from 'vitest'
+import { openGameDb, type GameDb } from './client'
+import * as schema from './schema'
+import { AdminError, deleteAdminRow, insertAdminRow, isAdminTableName, listAdminTables, readAdminRows, updateAdminRow } from './admin'
+
+const dirs: string[] = []
+
+async function freshFile(): Promise<GameDb> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-admin-test-'))
+  dirs.push(dir)
+  return openGameDb(path.join(dir, 'test.db'))
+}
+
+afterAll(async () => {
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+function expectAdminError(promise: Promise<unknown>, status: number): Promise<void> {
+  return promise.then(
+    () => {
+      throw new Error(`expected AdminError ${status}, resolved instead`)
+    },
+    (err) => {
+      expect(err).toBeInstanceOf(AdminError)
+      expect((err as AdminError).status).toBe(status)
+    },
+  )
+}
+
+describe('admin table registry', () => {
+  it('exposes every game table from schema.ts, keyed by SQL name', async () => {
+    const db = await freshFile()
+    const tables = await listAdminTables(db)
+    expect(tables.map((t) => t.name).sort()).toEqual(
+      Object.values(schema)
+        .map((s) => getTableName(s as Parameters<typeof getTableName>[0]))
+        .sort(),
+    )
+    expect(tables.every((t) => isAdminTableName(t.name))).toBe(true)
+    for (const bad of ['_meta', 'nope', 'Saves']) expect(isAdminTableName(bad)).toBe(false)
+
+    const saves = tables.find((t) => t.name === 'saves')!
+    expect(saves.columns.map((c) => c.name)).toEqual(['id', 'seed', 'turn', 'created_at', 'schema_version'])
+    expect(saves.count).toBe(0)
+  })
+
+  it('rejects unknown tables with 404 on every operation', async () => {
+    const db = await freshFile()
+    await expectAdminError(readAdminRows(db, 'nope'), 404)
+    await expectAdminError(insertAdminRow(db, 'nope', {}), 404)
+    await expectAdminError(updateAdminRow(db, 'nope', { id: 1 }, {}), 404)
+    await expectAdminError(deleteAdminRow(db, 'nope', { id: 1 }), 404)
+  })
+})
+
+describe('admin row CRUD (single-PK tables)', () => {
+  it('inserts, reads back and pages rows with limit/offset validation', async () => {
+    const db = await freshFile()
+    const row = await insertAdminRow(db, 'saves', { seed: 'abc', turn: 0, created_at: '2026-01-01T00:00:00Z' })
+    expect(row.id).toBe(1)
+    expect(row.seed).toBe('abc')
+
+    const all = await readAdminRows(db, 'saves')
+    expect(all.total).toBe(1)
+    expect(all.rows[0]).toMatchObject({ id: 1, seed: 'abc', turn: 0, schema_version: null })
+
+    for (const bad of [0, -1, 201]) await expectAdminError(readAdminRows(db, 'saves', bad), 400)
+    await expectAdminError(readAdminRows(db, 'saves', 50, -1), 400)
+  })
+
+  it('rejects unknown columns, missing required columns and wrong value types with 400', async () => {
+    const db = await freshFile()
+    await expectAdminError(insertAdminRow(db, 'saves', { bogus: 1 }), 400)
+    await expectAdminError(insertAdminRow(db, 'saves', { seed: 'x' }), 400) // created_at missing
+    await expectAdminError(insertAdminRow(db, 'saves', { seed: 'x', turn: 'nope', created_at: 't' }), 400)
+    await expectAdminError(insertAdminRow(db, 'saves', ['not', 'an', 'object']), 400)
+  })
+
+  it('updates by key and returns the fresh row; unknown keys are 404', async () => {
+    const db = await freshFile()
+    await insertAdminRow(db, 'saves', { seed: 'abc', turn: 0, created_at: 't' })
+
+    const updated = await updateAdminRow(db, 'saves', { id: 1 }, { turn: 5 })
+    expect(updated).toMatchObject({ id: 1, seed: 'abc', turn: 5 })
+
+    await expectAdminError(updateAdminRow(db, 'saves', { id: 99 }, { turn: 1 }), 404)
+    await expectAdminError(updateAdminRow(db, 'saves', {}, { turn: 1 }), 400) // missing pk column in key
+    await expectAdminError(updateAdminRow(db, 'saves', { id: 1 }, {}), 400) // nothing to set
+  })
+
+  it('deletes by key and returns the removed row; second delete is 404', async () => {
+    const db = await freshFile()
+    await insertAdminRow(db, 'saves', { seed: 'abc', turn: 0, created_at: 't' })
+
+    const deleted = await deleteAdminRow(db, 'saves', { id: 1 })
+    expect(deleted).toMatchObject({ id: 1, seed: 'abc' })
+    expect((await readAdminRows(db, 'saves')).total).toBe(0)
+    await expectAdminError(deleteAdminRow(db, 'saves', { id: 1 }), 404)
+  })
+
+  it('maps SQLite constraint violations to 409', async () => {
+    const db = await freshFile()
+    await insertAdminRow(db, 'crew', { save_id: 1, name: 'A', role: 'PILOT', trait_good: 'g', trait_bad: 'b', origin: 'STARTING CREW' })
+    // ship_systems has UNIQUE(save_id, type) — a duplicate is a constraint failure, not a crash.
+    await insertAdminRow(db, 'ship_systems', { save_id: 1, type: 'HULL', level: 0, capacity: 0 })
+    await expectAdminError(insertAdminRow(db, 'ship_systems', { save_id: 1, type: 'HULL', level: 1, capacity: 0 }), 409)
+  })
+})
+
+describe('admin row CRUD (composite-PK tables)', () => {
+  it('requires every PK column in the key for jump_routes', async () => {
+    const db = await freshFile()
+    const row = await insertAdminRow(db, 'jump_routes', { from_system: 1, to_system: 2 })
+    expect(row).toMatchObject({ from_system: 1, to_system: 2 })
+
+    // PK columns are NOT NULL without defaults — omitting one is a 400, not a SQLite error.
+    await expectAdminError(insertAdminRow(db, 'jump_routes', { from_system: 1 }), 400)
+    await expectAdminError(updateAdminRow(db, 'jump_routes', { from_system: 1 }, {}), 400)
+
+    const deleted = await deleteAdminRow(db, 'jump_routes', { from_system: 1, to_system: 2 })
+    expect(deleted).toMatchObject({ from_system: 1, to_system: 2 })
+    await expectAdminError(deleteAdminRow(db, 'jump_routes', { from_system: 1, to_system: 3 }), 404)
+  })
+})

lib/db/admin.ts

@@ -0,0 +1,237 @@
+import { getTableName } from 'drizzle-orm'
+import type { SQLiteTable } from 'drizzle-orm/sqlite-core'
+import * as schema from './schema'
+import { persist, type GameDb } from './client'
+
+// #38 — admin CRUD over the raw DB. Every game table is exposed through this registry; the SQL
+// names come from the drizzle tables themselves (getTableName) so the list can't drift from
+// lib/db/schema.ts. All queries run on the raw sql.js handle driven by PRAGMA table_info, so there
+// is no per-table code — adding a table to schema.ts + this map is all it takes.
+export const ADMIN_TABLES = {
+  saves: schema.saves,
+  solar_systems: schema.solarSystems,
+  jump_routes: schema.jumpRoutes,
+  planets: schema.planets,
+  inventory_items: schema.inventoryItems,
+  crew: schema.crew,
+  ship_systems: schema.shipSystems,
+  tech: schema.tech,
+  missions: schema.missions,
+  events: schema.events,
+  tasks: schema.tasks,
+} as const satisfies Record<string, SQLiteTable>
+
+const TABLE_NAMES: Set<string> = new Set(Object.values(ADMIN_TABLES).map((t) => getTableName(t)))
+
+export function isAdminTableName(name: string): boolean {
+  return TABLE_NAMES.has(name)
+}
+
+// Thrown by the helpers below; routes map it to a JSON error response with its status.
+export class AdminError extends Error {
+  constructor(
+    public readonly status: number,
+    message: string,
+  ) {
+    super(message)
+  }
+}
+
+function assertTable(name: string): void {
+  if (!TABLE_NAMES.has(name)) throw new AdminError(404, `Unknown table '${name}'`)
+}
+
+type SqlParam = string | number | null
+
+// Column metadata straight from SQLite. pk is the position within the primary key (0 = not a PK),
+// so composite keys like jump_routes(from_system, to_system) come out ordered for free.
+export interface AdminColumn {
+  name: string
+  type: string
+  notNull: boolean
+  hasDefault: boolean
+  pk: number
+}
+
+function tableColumns(db: GameDb, name: string): AdminColumn[] {
+  const res = db.raw.exec(`PRAGMA table_info(${name})`) // name validated by assertTable — no injection path
+  return (res[0]?.values ?? []).map((v) => ({
+    name: String(v[1]),
+    type: String(v[2]).toUpperCase(),
+    notNull: v[3] === 1,
+    hasDefault: v[4] !== null && v[4] !== undefined,
+    pk: Number(v[5]) || 0,
+  }))
+}
+
+function rowCount(db: GameDb, name: string): number {
+  return Number(db.raw.exec(`SELECT COUNT(*) FROM ${name}`)[0]?.values[0][0] ?? 0)
+}
+
+export interface AdminTableInfo {
+  name: string
+  // pk mirrors PRAGMA table_info: position within the primary key (0 = not one), so the UI can
+  // build row keys for any table, composite included.
+  columns: { name: string; type: string; pk: number }[]
+  count: number
+}
+
+export async function listAdminTables(db: GameDb): Promise<AdminTableInfo[]> {
+  const out: AdminTableInfo[] = []
+  for (const table of Object.values(ADMIN_TABLES)) {
+    const name = getTableName(table)
+    const cols = tableColumns(db, name)
+    out.push({ name, columns: cols.map((c) => ({ name: c.name, type: c.type, pk: c.pk })), count: rowCount(db, name) })
+  }
+  return out.sort((a, b) => a.name.localeCompare(b.name))
+}
+
+export interface AdminRows {
+  rows: Record<string, unknown>[]
+  total: number
+}
+
+const MAX_ROWS = 200
+
+export async function readAdminRows(db: GameDb, name: string, limit = 50, offset = 0): Promise<AdminRows> {
+  assertTable(name)
+  if (!Number.isInteger(limit) || limit < 1 || limit > MAX_ROWS) throw new AdminError(400, `limit must be an integer in [1, ${MAX_ROWS}]`)
+  if (!Number.isInteger(offset) || offset < 0) throw new AdminError(400, 'offset must be a non-negative integer')
+
+  const res = db.raw.exec(`SELECT * FROM ${name} LIMIT ? OFFSET ?`, [limit, offset])
+  return {
+    rows: (res[0]?.values ?? []).map((v) => Object.fromEntries(res[0].columns.map((c, i) => [c, v[i]]))),
+    total: rowCount(db, name),
+  }
+}
+
+// sql.js throws a plain Error on constraint violations (UNIQUE/FK/NOT NULL) — map those to 409.
+function runWrite(db: GameDb, sql: string, params: SqlParam[]): void {
+  try {
+    db.raw.run(sql, params)
+  } catch (err) {
+    throw new AdminError(409, err instanceof Error ? err.message : String(err))
+  }
+}
+
+// JSON scalar → SQLite value for the column's declared type. Booleans fold into INTEGER columns
+// (the schema stores flags as 0/1); null is only allowed where the column allows it.
+function coerce(value: unknown, col: AdminColumn): SqlParam {
+  if (value === null) {
+    if (col.notNull && !col.hasDefault) throw new AdminError(400, `column '${col.name}' cannot be NULL`)
+    return null
+  }
+  const isInt = col.type.includes('INT')
+  const isReal = /REAL|FLOA|DOUB|NUM/.test(col.type)
+  if (isInt || isReal) {
+    const n = typeof value === 'boolean' ? (value ? 1 : 0) : typeof value === 'number' ? value : NaN
+    if (!Number.isFinite(n)) throw new AdminError(400, `column '${col.name}' must be a number`)
+    return isInt && !isReal ? Math.trunc(n) : n
+  }
+  if (typeof value !== 'string') throw new AdminError(400, `column '${col.name}' must be a string or null`)
+  return value
+}
+
+function checkKey(name: string, cols: AdminColumn[], key: unknown): Record<string, number> {
+  const pk = cols.filter((c) => c.pk > 0).sort((a, b) => a.pk - b.pk)
+  if (typeof key !== 'object' || key === null || Array.isArray(key)) throw new AdminError(400, `key must be an object with the primary key columns (${pk.map((c) => c.name).join(', ')})`)
+  const out: Record<string, number> = {}
+  for (const col of pk) {
+    const v = (key as Record<string, unknown>)[col.name]
+    if (typeof v !== 'number' || !Number.isInteger(v)) throw new AdminError(400, `key column '${col.name}' must be an integer`)
+    out[col.name] = v
+  }
+  return out
+}
+
+function pkWhere(cols: AdminColumn[], key: Record<string, number>): { sql: string; params: number[] } {
+  const pks = cols.filter((c) => c.pk > 0).sort((a, b) => a.pk - b.pk)
+  return {
+    sql: pks.map((c) => `${c.name} = ?`).join(' AND '),
+    params: pks.map((c) => key[c.name]),
+  }
+}
+
+function fetchRow(db: GameDb, name: string, whereSql: string, params: SqlParam[]): Record<string, unknown> | null {
+  const res = db.raw.exec(`SELECT * FROM ${name} WHERE ${whereSql}`, params)
+  const v = res[0]?.values[0]
+  return v ? Object.fromEntries(res[0].columns.map((c, i) => [c, v[i]])) : null
+}
+
+export async function insertAdminRow(db: GameDb, name: string, values: unknown): Promise<Record<string, unknown>> {
+  assertTable(name)
+  if (typeof values !== 'object' || values === null || Array.isArray(values)) throw new AdminError(400, 'body must be a JSON object of column → value')
+  const cols = tableColumns(db, name)
+  const byName = new Map(cols.map((c) => [c.name, c]))
+
+  const entries: [string, SqlParam][] = []
+  for (const [k, v] of Object.entries(values as Record<string, unknown>)) {
+    const col = byName.get(k)
+    if (!col) throw new AdminError(400, `Unknown column '${k}' in table '${name}'`)
+    entries.push([k, coerce(v, col)])
+  }
+  for (const col of cols) {
+    // Autoincrement single-PK ids are optional; everything else NOT NULL without a default is required.
+    const pks = cols.filter((c) => c.pk > 0)
+    if (!entries.some(([k]) => k === col.name) && col.notNull && !col.hasDefault && !(col.pk > 0 && pks.length === 1)) {
+      throw new AdminError(400, `Missing required column '${col.name}'`)
+    }
+  }
+
+  const names = entries.map(([k]) => k)
+  runWrite(db, `INSERT INTO ${name} (${names.join(', ')}) VALUES (${entries.map(() => '?').join(', ')})`, entries.map(([, v]) => v))
+  // Read last_insert_rowid() BEFORE persist(): sql.js's export() resets the per-connection value.
+  const lastId = Number(db.raw.exec('SELECT last_insert_rowid()')[0]?.values[0][0])
+  await persist(db)
+
+  // Read the row back: explicit PK values win, otherwise fall back to last_insert_rowid().
+  const pks = cols.filter((c) => c.pk > 0).sort((a, b) => a.pk - b.pk)
+  if (pks.length === 1 && !entries.some(([k]) => k === pks[0].name)) {
+    return fetchRow(db, name, `${pks[0].name} = ?`, [lastId])!
+  }
+  const key: Record<string, number> = {}
+  for (const c of pks) {
+    const e = entries.find(([k]) => k === c.name)
+    if (!e) throw new AdminError(400, `Missing primary key column '${c.name}'`)
+    key[c.name] = Number(e[1])
+  }
+  const where = pkWhere(cols, key)
+  return fetchRow(db, name, where.sql, where.params)!
+}
+
+export async function updateAdminRow(db: GameDb, name: string, key: unknown, values: unknown): Promise<Record<string, unknown>> {
+  assertTable(name)
+  const cols = tableColumns(db, name)
+  const byName = new Map(cols.map((c) => [c.name, c]))
+  const pkKey = checkKey(name, cols, key)
+
+  if (typeof values !== 'object' || values === null || Array.isArray(values)) throw new AdminError(400, 'values must be a JSON object of column → value')
+  const entries: [string, SqlParam][] = []
+  for (const [k, v] of Object.entries(values as Record<string, unknown>)) {
+    const col = byName.get(k)
+    if (!col) throw new AdminError(400, `Unknown column '${k}' in table '${name}'`)
+    entries.push([k, coerce(v, col)])
+  }
+  if (entries.length === 0) throw new AdminError(400, 'values must contain at least one column')
+
+  const where = pkWhere(cols, pkKey)
+  runWrite(db, `UPDATE ${name} SET ${entries.map(([k]) => `${k} = ?`).join(', ')} WHERE ${where.sql}`, [...entries.map(([, v]) => v), ...where.params])
+  await persist(db)
+
+  const row = fetchRow(db, name, where.sql, where.params)
+  if (!row) throw new AdminError(404, `No row in '${name}' with that key`)
+  return row
+}
+
+export async function deleteAdminRow(db: GameDb, name: string, key: unknown): Promise<Record<string, unknown>> {
+  assertTable(name)
+  const cols = tableColumns(db, name)
+  const pkKey = checkKey(name, cols, key)
+  const where = pkWhere(cols, pkKey)
+
+  const row = fetchRow(db, name, where.sql, where.params)
+  if (!row) throw new AdminError(404, `No row in '${name}' with that key`)
+  runWrite(db, `DELETE FROM ${name} WHERE ${where.sql}`, where.params)
+  await persist(db)
+  return row
+}

lib/db/client.ts

@@ -24,7 +24,8 @@ CREATE TABLE IF NOT EXISTS saves (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   seed TEXT NOT NULL,
   turn INTEGER NOT NULL DEFAULT 0,
-  created_at TEXT NOT NULL
+  created_at TEXT NOT NULL,
+  schema_version INTEGER -- which save-schema version this row was backfilled up to (NULL = v1)
 );
 
 CREATE TABLE IF NOT EXISTS solar_systems (
@@ -61,6 +62,52 @@ CREATE TABLE IF NOT EXISTS inventory_items (
   qty INTEGER NOT NULL DEFAULT 1
 );
 
+CREATE TABLE IF NOT EXISTS crew (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  save_id INTEGER NOT NULL REFERENCES saves(id),
+  name TEXT NOT NULL,
+  role TEXT NOT NULL,
+  trait_good TEXT NOT NULL,
+  trait_bad TEXT NOT NULL,
+  origin TEXT NOT NULL -- 'STARTING CREW' or '<planet>, <system>' for members found while exploring
+);
+
+CREATE TABLE IF NOT EXISTS ship_systems (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  save_id INTEGER NOT NULL REFERENCES saves(id),
+  type TEXT NOT NULL,
+  level INTEGER NOT NULL DEFAULT 0, -- 0 = not built yet ('built' is derived: level > 0)
+  capacity INTEGER NOT NULL DEFAULT 0,
+  UNIQUE (save_id, type)
+);
+
+CREATE TABLE IF NOT EXISTS tech (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  save_id INTEGER NOT NULL REFERENCES saves(id),
+  slug TEXT NOT NULL, -- stable key, e.g. WEAPONS_SYSTEMS
+  name TEXT NOT NULL, -- display name, e.g. 'WEAPONS SYSTEMS'
+  cost_kind TEXT NOT NULL, -- 'resource' | 'part'
+  cost_qty INTEGER NOT NULL DEFAULT 1,
+  prerequisites TEXT NOT NULL DEFAULT '', -- comma-separated tech slugs, '' when none
+  effect TEXT NOT NULL, -- effect slug — semantics in EFFECTS (lib/game/tech.ts)
+  researched INTEGER NOT NULL DEFAULT 0,
+  UNIQUE (save_id, slug)
+);
+
+CREATE TABLE IF NOT EXISTS missions (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  save_id INTEGER NOT NULL REFERENCES saves(id),
+  type TEXT NOT NULL, -- 'DELIVER' | 'EXPLORE' | 'FIND'
+  description TEXT NOT NULL, -- human-readable objective, e.g. "Jump to Kepler Drift"
+  target_system_id INTEGER, -- DELIVER only — destination system (NULL otherwise)
+  condition_kind TEXT, -- FIND only — 'resource' | 'part' (NULL otherwise)
+  progress_target INTEGER NOT NULL DEFAULT 1, -- EXPLORE: scans required; 1 for the others
+  progress INTEGER NOT NULL DEFAULT 0, -- scans counted since acceptance; 0/1 for DELIVER/FIND
+  reward_kind TEXT NOT NULL, -- 'resource' | 'part'
+  reward_qty INTEGER NOT NULL DEFAULT 1,
+  state TEXT NOT NULL DEFAULT 'AVAILABLE' -- 'AVAILABLE' | 'ACTIVE' | 'DONE'
+);
+
 CREATE TABLE IF NOT EXISTS events (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   save_id INTEGER NOT NULL REFERENCES saves(id),
@@ -69,6 +116,19 @@ CREATE TABLE IF NOT EXISTS events (
   message TEXT NOT NULL,
   created_at TEXT NOT NULL
 );
+
+CREATE TABLE IF NOT EXISTS tasks (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  save_id INTEGER NOT NULL REFERENCES saves(id),
+  type TEXT NOT NULL, -- 'JUMP' | 'EXPLORE' | 'SHIP_UPGRADE' | 'SHIP_EXPAND' | 'SHIP_BUILD' | 'RESEARCH'
+  payload TEXT NOT NULL, -- JSON per type: JUMP {systemId, hops} · SHIP_UPGRADE/EXPAND {systemId} · SHIP_BUILD {type} · RESEARCH {techId} · EXPLORE {planetId}
+  lead_crew_id INTEGER NOT NULL REFERENCES crew(id),
+  helpers TEXT NOT NULL DEFAULT '[]', -- JSON array of crew ids
+  duration INTEGER NOT NULL,
+  remaining INTEGER NOT NULL,
+  status TEXT NOT NULL DEFAULT 'ACTIVE', -- 'ACTIVE' | 'PENDING' | 'DONE'
+  queued_at_turn INTEGER NOT NULL DEFAULT 0
+);
 `;
 
 // SPACE_WANDERER_DB_PATH override exists so unit tests can point at a temp file instead
@@ -88,6 +148,14 @@ async function open(file: string): Promise<GameDb> {
   const raw = bytes ? new SQL.Database(new Uint8Array(bytes)) : new SQL.Database();
   raw.exec(DDL); // no-op for tables that already exist in an older file
 
+  // Idempotent evolution for files created by older code: CREATE TABLE IF NOT EXISTS above cannot
+  // add columns, so check and add any that are missing. This is what makes DB wipes unnecessary —
+  // old saves open fine and get backfilled by ensureSave (see lib/game/save.ts).
+  const saveCols = raw.exec('PRAGMA table_info(saves)')[0]?.values.map((v) => v[1]) ?? [];
+  if (!saveCols.includes('schema_version')) {
+    raw.exec('ALTER TABLE saves ADD COLUMN schema_version INTEGER');
+  }
+
   const instance: GameDb = { db: drizzle(raw, { schema }), raw, file };
 
   // First run: stamp when this DB was created and land the file on disk so the ./db volume

lib/db/schema.ts

@@ -1,4 +1,4 @@
-import { integer, primaryKey, real, sqliteTable, text } from 'drizzle-orm/sqlite-core'
+import { integer, primaryKey, real, sqliteTable, text, uniqueIndex } from 'drizzle-orm/sqlite-core'
 
 // Drizzle schema for game state. Single-player by design: exactly ONE save row ever exists
 // (no auth/accounts), so every table hangs off saves.id but only one save is in play.
@@ -11,13 +11,16 @@ export const saves = sqliteTable('saves', {
   seed: text('seed').notNull(),
   turn: integer('turn').notNull().default(0),
   createdAt: text('created_at').notNull(),
+  // Which schema version this save was last brought up to (NULL on saves from before the
+  // column existed = v1). ensureSave runs ordered idempotent backfill steps for anything below.
+  schemaVersion: integer('schema_version'),
 })
 
 export const solarSystems = sqliteTable('solar_systems', {
   id: integer('id').primaryKey({ autoIncrement: true }),
   saveId: integer('save_id').notNull().references(() => saves.id),
   name: text('name').notNull(),
-  // 0–100 coordinate space, rendered directly by the NodeGraph component.
+  // 0–100 coordinate space; seeds the force-directed WORLD MAP layout (components/world-map.tsx).
   x: real('x').notNull(),
   y: real('y').notNull(),
   discovered: integer('discovered', { mode: 'boolean' }).notNull().default(false),
@@ -58,6 +61,71 @@ export const inventoryItems = sqliteTable('inventory_items', {
   qty: integer('qty').notNull().default(1),
 })
 
+// The ship's crew roster: the starting crew (seeded on new game) plus members found while
+// exploring planets/moons. Display-only for now — no dismiss/assign actions yet (#7 scope).
+export const crew = sqliteTable('crew', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  saveId: integer('save_id').notNull().references(() => saves.id),
+  name: text('name').notNull(),
+  role: text('role').notNull(),
+  traitGood: text('trait_good').notNull(),
+  traitBad: text('trait_bad').notNull(),
+  // Where the member came from: 'STARTING CREW' or '<planet>, <system>' for found members.
+  origin: text('origin').notNull(),
+})
+
+// The ship's systems, one row per known type (see SHIP_TYPES in lib/game/ship-costs.ts).
+// `built` is derived, not stored: level > 0 means built — unbuilt rows sit at level/capacity 0.
+export const shipSystems = sqliteTable(
+  'ship_systems',
+  {
+    id: integer('id').primaryKey({ autoIncrement: true }),
+    saveId: integer('save_id').notNull().references(() => saves.id),
+    type: text('type').notNull(),
+    level: integer('level').notNull().default(0), // 0 = not built yet
+    capacity: integer('capacity').notNull().default(0),
+  },
+  (t) => [uniqueIndex('ship_systems_save_type_unique').on(t.saveId, t.type)],
+)
+
+// The technology tree, one row per known tech (see TECHS in lib/game/tech.ts). Definitions are
+// seeded from the pure module on new game / backfill v5 — same pattern as ship_systems.
+// `researched` is the per-save progress; prerequisites/effect are stored for completeness but
+// the canonical semantics live in lib/game/tech.ts (EFFECTS).
+export const tech = sqliteTable(
+  'tech',
+  {
+    id: integer('id').primaryKey({ autoIncrement: true }),
+    saveId: integer('save_id').notNull().references(() => saves.id),
+    slug: text('slug').notNull(), // stable key, e.g. WEAPONS_SYSTEMS
+    name: text('name').notNull(), // display name, e.g. 'WEAPONS SYSTEMS'
+    costKind: text('cost_kind').notNull(), // 'resource' | 'part'
+    costQty: integer('cost_qty').notNull().default(1),
+    prerequisites: text('prerequisites').notNull().default(''), // comma-separated tech slugs, '' when none
+    effect: text('effect').notNull(), // effect slug — semantics in EFFECTS (lib/game/tech.ts)
+    researched: integer('researched', { mode: 'boolean' }).notNull().default(false),
+  },
+  (t) => [uniqueIndex('tech_save_slug_unique').on(t.saveId, t.slug)],
+)
+
+// The mission board (#10): contracts generated deterministically from the save seed, one ACTIVE
+// at a time. `type` drives completion semantics (see advanceMission in lib/game/missions.ts):
+// DELIVER jumps to target_system_id, EXPLORE counts scans up to progress_target, FIND completes
+// when a scan's haul contains condition_kind. The reward lands in inventory_items on completion.
+export const missions = sqliteTable('missions', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  saveId: integer('save_id').notNull().references(() => saves.id),
+  type: text('type').notNull(), // 'DELIVER' | 'EXPLORE' | 'FIND'
+  description: text('description').notNull(), // human-readable objective, e.g. "Jump to Kepler Drift"
+  targetSystemId: integer('target_system_id'), // DELIVER only — destination system (NULL otherwise)
+  conditionKind: text('condition_kind'), // FIND only — 'resource' | 'part' (NULL otherwise)
+  progressTarget: integer('progress_target').notNull().default(1), // EXPLORE: scans required; 1 for the others
+  progress: integer('progress').notNull().default(0), // scans counted since acceptance; 0/1 for DELIVER/FIND
+  rewardKind: text('reward_kind').notNull(), // 'resource' | 'part'
+  rewardQty: integer('reward_qty').notNull().default(1),
+  state: text('state').notNull().default('AVAILABLE'), // 'AVAILABLE' | 'ACTIVE' | 'DONE'
+})
+
 // Append-only game log. Writers so far: new-game + jump events; later issues add more
 // writers and a read endpoint.
 export const events = sqliteTable('events', {
@@ -68,3 +136,20 @@ export const events = sqliteTable('events', {
   message: text('message').notNull(),
   createdAt: text('created_at').notNull(),
 })
+
+// Queued actions (PR A, spec §3): one row per task assigned to a team. `payload` is a JSON
+// string whose shape depends on `type` (see the Task interface in lib/game/tasks.ts);
+// `helpers` is a JSON array of crew ids. Upgraded saves start with an empty queue — the v7
+// backfill stamps the version, the DDL in client.ts creates the table.
+export const tasks = sqliteTable('tasks', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  saveId: integer('save_id').notNull().references(() => saves.id),
+  type: text('type').notNull(), // TaskType
+  payload: text('payload').notNull(),
+  leadCrewId: integer('lead_crew_id').notNull().references(() => crew.id),
+  helpers: text('helpers').notNull().default('[]'), // JSON array of crew ids
+  duration: integer('duration').notNull(),
+  remaining: integer('remaining').notNull(),
+  status: text('status').notNull().default('ACTIVE'), // 'ACTIVE' | 'PENDING' | 'DONE'
+  queuedAtTurn: integer('queued_at_turn').notNull().default(0),
+})

lib/game/crew-costs.ts

@@ -0,0 +1,71 @@
+// Pure crew-balance module (spec §11): every tuning knob for the duration model and skill
+// progression lives here, so tuning a number means editing one file. No lib/db imports —
+// the frontend imports this for the live duration preview in the crew picker (same precedent
+// as ship-costs.ts).
+import type { TaskType } from './tasks'
+
+export type SkillName = 'NAVIGATION' | 'SCANNING' | 'ENGINEERING' | 'RESEARCH'
+
+export const WORK_POINTS = { EXPLORE: 4, JUMP_PER_HOP: 3, SHIP_WORK: 6, RESEARCH: 9 } as const
+
+export const ACTION_SKILL: Record<TaskType, SkillName> = {
+  JUMP: 'NAVIGATION',
+  EXPLORE: 'SCANNING',
+  SHIP_UPGRADE: 'ENGINEERING',
+  SHIP_EXPAND: 'ENGINEERING',
+  SHIP_BUILD: 'ENGINEERING',
+  RESEARCH: 'RESEARCH',
+}
+
+export const PREFERRED_ROLES: Record<TaskType, string[]> = {
+  JUMP: ['PILOT', 'NAVIGATOR'],
+  EXPLORE: ['SCIENTIST'],
+  SHIP_UPGRADE: ['ENGINEER', 'TECHNICIAN'],
+  SHIP_EXPAND: ['ENGINEER', 'TECHNICIAN'],
+  SHIP_BUILD: ['ENGINEER', 'TECHNICIAN'],
+  RESEARCH: ['SCIENTIST'],
+}
+
+export const POWER_BANDS = [1, 1, 1, 2, 2, 3] // skill level 0..5 → power (L0–L2 → 1 · L3–L4 → 2 · L5 → 3)
+export const XP_THRESHOLDS = [5, 10, 15, 20, 25] // cumulative task completions for L1..L5 (cap 5)
+
+// Role → starting skill levels (spec §6): specialists start at L2, everyone else at L0.
+export const STARTING_LEVELS: Record<string, Record<SkillName, number>> = {
+  COMMANDER: { NAVIGATION: 0, SCANNING: 0, ENGINEERING: 0, RESEARCH: 0 },
+  PILOT: { NAVIGATION: 2, SCANNING: 0, ENGINEERING: 0, RESEARCH: 0 },
+  ENGINEER: { NAVIGATION: 0, SCANNING: 0, ENGINEERING: 2, RESEARCH: 0 },
+  MEDIC: { NAVIGATION: 0, SCANNING: 0, ENGINEERING: 0, RESEARCH: 0 },
+  NAVIGATOR: { NAVIGATION: 2, SCANNING: 0, ENGINEERING: 0, RESEARCH: 0 },
+  SCIENTIST: { NAVIGATION: 0, SCANNING: 2, ENGINEERING: 0, RESEARCH: 2 },
+  GUNNER: { NAVIGATION: 0, SCANNING: 0, ENGINEERING: 0, RESEARCH: 0 },
+  TECHNICIAN: { NAVIGATION: 0, SCANNING: 0, ENGINEERING: 2, RESEARCH: 0 },
+}
+
+// The lead's good trait that cancels the role-mismatch penalty (spec §5).
+export const MISMATCH_CANCEL_TRAIT = 'STEADY UNDER PRESSURE'
+
+// All 15 duration traits of spec §5, keyed by the EXACT trait strings from lib/game/crew.ts.
+// Value = additive turn modifier keyed by action type or 'ANY'; empty object = no additive
+// modifier (the trait's effect is the mismatch cancel, see MISMATCH_CANCEL_TRAIT). Traits
+// with no entry (the three STANDBY combat traits and #45's outcome traits) contribute 0.
+// "SHIP work" covers all three SHIP types.
+export const TRAIT_DURATION_MODIFIERS: Record<string, Partial<Record<TaskType | 'ANY', number>>> = {
+  'STEADY UNDER PRESSURE': {},
+  'RECKLESS COURAGE': { JUMP: -1 },
+  'CALM IN A CRISIS': { EXPLORE: -1 },
+  'FIXES ANYTHING': { SHIP_UPGRADE: -1, SHIP_EXPAND: -1, SHIP_BUILD: -1 },
+  'READS STARS BLIND': { JUMP: -1 },
+  'QUICK HANDS': { ANY: -1 },
+  'IRON WILL': { RESEARCH: -1 },
+  'RIGID — SLOW TO ADAPT': { RESEARCH: 1 },
+  'OVERCAUTIOUS': { ANY: 1 },
+  'SLOWS THE CREW DOWN': { ANY: 1 },
+  'CARELESS WITH FUSES': { SHIP_UPGRADE: 1, SHIP_EXPAND: 1, SHIP_BUILD: 1 },
+  'HOARDS RATIONS': { SHIP_UPGRADE: 1, SHIP_EXPAND: 1, SHIP_BUILD: 1 },
+  'FORGETS TO EAT': { EXPLORE: 1 },
+  'ARGUES WITH EVERYONE': { RESEARCH: 1 },
+  'DOUBTS THE CAPTAIN': { JUMP: 1 },
+}
+
+export const RECRUIT_CHANCE_BASE = 0.18 // a scan finds a joining member (matches crew.ts's current CREW_CHANCE)
+export const RECRUIT_CHANCE_TALKER = 0.3 // lead with TALKS TO ANYONE (wired in PR C)

lib/game/crew.test.ts

@@ -0,0 +1,87 @@
+import { describe, expect, it } from 'vitest'
+import { CREW_CHANCE, generateStartingCrew, makeCrewName, rollCrewMember, startingCrewRng } from './crew'
+import { explorationRng } from './world'
+
+describe('generateStartingCrew', () => {
+  it('gives a new game 2–3 members, each with exactly one good and one bad trait', () => {
+    for (const seed of [1, 7, 42, 999]) {
+      const crew = generateStartingCrew(startingCrewRng(String(seed)))
+      expect(crew.length).toBeGreaterThanOrEqual(2)
+      expect(crew.length).toBeLessThanOrEqual(3)
+
+      for (const member of crew) {
+        expect(member.name.trim().length).toBeGreaterThan(0)
+        expect(member.role.trim().length).toBeGreaterThan(0)
+        expect(member.traitGood.trim().length).toBeGreaterThan(0)
+        expect(member.traitBad.trim().length).toBeGreaterThan(0)
+      }
+      // Names are unique within the crew; roles too (drawn without replacement).
+      expect(new Set(crew.map((m) => m.name)).size).toBe(crew.length)
+      expect(new Set(crew.map((m) => m.role)).size).toBe(crew.length)
+    }
+  })
+
+  it('is deterministic under a fixed seed and differs across seeds', () => {
+    const a = generateStartingCrew(startingCrewRng('42'))
+    expect(generateStartingCrew(startingCrewRng('42'))).toEqual(a) // same save → same crew
+    const b = generateStartingCrew(startingCrewRng('43'))
+    expect(JSON.stringify(b)).not.toBe(JSON.stringify(a)) // different seed → different crew
+  })
+})
+
+describe('rollCrewMember', () => {
+  it('finds a member with the documented probability and never reuses a taken name', () => {
+    const rng = startingCrewRng('42')
+    let found = 0
+    for (let i = 0; i < 1000; i++) found += rollCrewMember(rng, new Set<string>()) ? 1 : 0
+    // 18% ± a comfortable band — catches an inverted or missing chance without flaking.
+    expect(found).toBeGreaterThan(90)
+    expect(found).toBeLessThan(270)
+
+    const taken = new Set(['Ava Vance'])
+    for (let i = 0; i < 50; i++) {
+      const member = rollCrewMember(startingCrewRng(String(i)), taken)
+      if (member) expect(member.name).not.toBe('Ava Vance') // never reuses a roster name
+    }
+  })
+
+  it('is deterministic per save+planet when drawn from the exploration stream', () => {
+    const first = rollCrewMember(explorationRng('42', 13), new Set<string>())
+    expect(rollCrewMember(explorationRng('42', 13), new Set<string>())).toEqual(first) // same save+planet → same result
+
+    // Across many planets both outcomes occur (someone is found, someone isn't).
+    let found = 0
+    for (let planetId = 1; planetId <= 200; planetId++) {
+      if (rollCrewMember(explorationRng('42', planetId), new Set<string>())) found++
+    }
+    expect(found).toBeGreaterThan(0)
+    expect(found).toBeLessThan(200)
+  })
+
+  it('keeps the crew chance documented and sane', () => {
+    expect(CREW_CHANCE).toBeGreaterThanOrEqual(0.15)
+    expect(CREW_CHANCE).toBeLessThanOrEqual(0.2)
+  })
+})
+
+describe('makeCrewName', () => {
+  it('never reuses a taken name and always terminates', () => {
+    const rng = startingCrewRng('7')
+    const taken = new Set<string>()
+    for (let i = 0; i < 40; i++) makeCrewName(rng, taken)
+    expect(taken.size).toBe(40)
+  })
+
+  it('terminates with numbered variants once all 352 base names are taken', () => {
+    const rng = startingCrewRng('7')
+    const taken = new Set<string>()
+    for (let i = 0; i < 352; i++) makeCrewName(rng, taken) // exhaust the whole pool
+    expect(taken.size).toBe(352)
+
+    const a = makeCrewName(rng, taken) // must return instead of spinning forever
+    const b = makeCrewName(rng, taken)
+    expect(a).not.toBe(b)
+    expect(taken.has(a)).toBe(true)
+    expect(taken.has(b)).toBe(true)
+  })
+})

lib/game/crew.ts

@@ -0,0 +1,105 @@
+// Pure, seeded crew generation — no DB, no Date, no Math.random. Same seed → same starting
+// crew; the exploration crew roll draws from the caller's per-planet rng stream so a found
+// member is deterministic per save+planet (same derivation as the resource/part haul).
+
+import { mulberry32 } from './world'
+
+export interface CrewMember {
+  name: string
+  role: string
+  traitGood: string
+  traitBad: string
+}
+
+const FIRST_NAMES = [
+  'AVA', 'BEN', 'CASS', 'DANA', 'ELI', 'FERN', 'GIDEON', 'HALYA',
+  'IVAR', 'JUNO', 'KAI', 'LORE', 'MARA', 'NICO', 'ODESSA', 'PETRA',
+]
+
+const LAST_NAMES = [
+  'VANCE', 'OKONKWO', 'SORENSEN', 'DELACRUZ', 'HALLOWAY', 'IBARRA', 'KOVAC', 'LINDQVIST',
+  'MERCER', 'NADEAU', 'ORLOV', 'QUINTANA', 'REYES', 'STALKE', 'TANAKA', 'UNDERWOOD',
+  'VALDEZ', 'WHITLOCK', 'YAMADA', 'ZUBEROV', 'ASHFORD', 'BLACKWELL',
+]
+
+const ROLES = ['COMMANDER', 'PILOT', 'ENGINEER', 'MEDIC', 'NAVIGATOR', 'SCIENTIST', 'GUNNER', 'TECHNICIAN']
+
+const GOOD_TRAITS = [
+  'STEADY UNDER PRESSURE', 'RECKLESS COURAGE', 'CALM IN A CRISIS', 'FIXES ANYTHING',
+  'SHARP SHOOTER', 'READS STARS BLIND', 'QUICK HANDS', 'IRON WILL',
+  'FINDS HIDDEN THINGS', 'TALKS TO ANYONE',
+]
+
+const BAD_TRAITS = [
+  'RIGID — SLOW TO ADAPT', 'SHORT FUSE', 'OVERCAUTIOUS', 'CARELESS WITH FUSES',
+  'SLOWS THE CREW DOWN', 'ARGUES WITH EVERYONE', 'FORGETS TO EAT', 'JINXED IN A DOGFIGHT',
+  'HOARDS RATIONS', 'DOUBTS THE CAPTAIN',
+]
+
+const STARTING_CREW_MIN = 2
+const STARTING_CREW_SPREAD = 2 // 2..3 starting members
+export const CREW_CHANCE = 0.18 // a scan finds a crew member who joins the ship (~1 in 5-6 scans)
+
+// A task team is one lead plus up to this many members total — the queueing routes reject
+// a bigger team with a 400 (spec §3 leaves the cap to balance; 4 lets a full crew bring
+// RESEARCH's 9 work points down to 3 turns, matching a solo L5 specialist).
+export const MAX_TEAM_SIZE = 4
+
+function title(word: string): string {
+  return word.charAt(0) + word.slice(1).toLowerCase()
+}
+
+function pick<T>(rng: () => number, arr: T[]): T {
+  return arr[Math.floor(rng() * arr.length)]
+}
+
+// A name unique against `taken` (the current roster), claimed into the set on success.
+// The pool is finite (16×22=352) and the roster has no cap, so — like makeName — fall back to
+// numbered variants once every base is taken instead of spinning forever.
+export function makeCrewName(rng: () => number, taken: Set<string>): string {
+  for (;;) {
+    const base = `${title(pick(rng, FIRST_NAMES))} ${pick(rng, LAST_NAMES)}`
+    if (!taken.has(base)) {
+      taken.add(base)
+      return base
+    }
+    if (taken.size >= FIRST_NAMES.length * LAST_NAMES.length) {
+      for (let n = 2; ; n++) {
+        const name = `${base} ${n}`
+        if (!taken.has(name)) {
+          taken.add(name)
+          return name
+        }
+      }
+    }
+  }
+}
+
+// The crew a new game starts with: 2–3 members, unique names and roles (roles are drawn
+// without replacement). Pure — the caller derives the rng from the save seed.
+export function generateStartingCrew(rng: () => number): CrewMember[] {
+  const taken = new Set<string>()
+  const roles = [...ROLES]
+  const crew: CrewMember[] = []
+  for (let i = 0; i < STARTING_CREW_MIN + Math.floor(rng() * STARTING_CREW_SPREAD); i++) {
+    const role = roles.splice(Math.floor(rng() * roles.length), 1)[0]
+    crew.push({ name: makeCrewName(rng, taken), role, traitGood: pick(rng, GOOD_TRAITS), traitBad: pick(rng, BAD_TRAITS) })
+  }
+  return crew
+}
+
+// The exploration crew roll: with CREW_CHANCE a member is found and joins the ship. Draws
+// from the SAME per-planet rng stream as the resource/part haul (called after it in
+// save.ts), so the outcome stays deterministic per save+planet. `taken` is the current
+// roster's names, keeping every name on the ship unique.
+export function rollCrewMember(rng: () => number, taken: Set<string>): CrewMember | null {
+  if (rng() >= CREW_CHANCE) return null
+  const role = pick(rng, ROLES)
+  return { name: makeCrewName(rng, taken), role, traitGood: pick(rng, GOOD_TRAITS), traitBad: pick(rng, BAD_TRAITS) }
+}
+
+// Independent PRNG stream for the starting crew of one save (same pattern as bodyRng /
+// explorationRng in world.ts — a fixed offset keeps it away from every other derivation).
+export function startingCrewRng(seed: string): () => number {
+  return mulberry32((Number(seed) + 0x51ed270b) >>> 0)
+}

lib/game/events.test.ts

@@ -0,0 +1,68 @@
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { openGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { getWorldState } from './save'
+import { DEFAULT_LIMIT, EventError, MAX_LIMIT, getEvents, parseEventLimit } from './events'
+
+const dirs: string[] = []
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-events-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  return { db: await openGameDb(file), file }
+}
+
+afterAll(async () => {
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+// Appends `count` synthetic events (turns 1..count) on top of the turn-0 new_game event.
+async function seedEvents(db: GameDb, count: number): Promise<void> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  for (let i = 1; i <= count; i++) {
+    await db.db.insert(schema.events).values({ saveId: save.id, turn: i, type: 'test', message: `event ${i}`, createdAt: new Date(Date.UTC(2026, 8, 29, 0, i)).toISOString() })
+  }
+}
+
+describe('parseEventLimit', () => {
+  it('defaults to DEFAULT_LIMIT when the param is absent', () => {
+    expect(parseEventLimit(null)).toBe(DEFAULT_LIMIT)
+  })
+
+  it('accepts integers in [1, MAX_LIMIT]', () => {
+    expect(parseEventLimit('1')).toBe(1)
+    expect(parseEventLimit(String(MAX_LIMIT))).toBe(MAX_LIMIT)
+    expect(parseEventLimit('25')).toBe(25)
+  })
+
+  it('rejects non-integers and out-of-range values with a 400', () => {
+    for (const bad of ['abc', '', '0', '-3', String(MAX_LIMIT + 1), '2.5']) {
+      try {
+        parseEventLimit(bad)
+        expect.unreachable(`limit ${JSON.stringify(bad)} should have been rejected`)
+      } catch (err) {
+        expect(err).toBeInstanceOf(EventError)
+        expect((err as EventError).status).toBe(400)
+      }
+    }
+  })
+})
+
+describe('getEvents', () => {
+  it('returns the latest events newest-first, sliced to limit', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db) // auto-initializes the save (turn-0 new_game event)
+    await seedEvents(db, 5)
+
+    const all = await getEvents(db, DEFAULT_LIMIT)
+    expect(all.map((e) => e.turn)).toEqual([5, 4, 3, 2, 1, 0]) // newest first, turn-0 line included
+    expect(all[all.length - 1].type).toBe('new_game')
+
+    const two = await getEvents(db, 2)
+    expect(two.map((e) => [e.turn, e.message])).toEqual([[5, 'event 5'], [4, 'event 4']])
+  })
+})

lib/game/events.ts

@@ -0,0 +1,40 @@
+import { desc } from 'drizzle-orm'
+import * as schema from '@/lib/db/schema'
+import type { GameDb } from '@/lib/db/client'
+
+export interface EventDto {
+  id: number
+  turn: number
+  type: string
+  message: string
+  createdAt: string
+}
+
+export const DEFAULT_LIMIT = 50
+export const MAX_LIMIT = 200
+
+export class EventError extends Error {
+  constructor(
+    public readonly status: number,
+    message: string,
+  ) {
+    super(message)
+  }
+}
+
+// Parses the optional ?limit= query param. Absent → default; anything that is not an integer in
+// [1, MAX_LIMIT] is a 400 (the route maps EventError to its status).
+export function parseEventLimit(raw: string | null): number {
+  if (raw === null) return DEFAULT_LIMIT
+  const limit = Number(raw)
+  if (!Number.isInteger(limit) || limit < 1 || limit > MAX_LIMIT) {
+    throw new EventError(400, `limit must be an integer between 1 and ${MAX_LIMIT}`)
+  }
+  return limit
+}
+
+// The latest N events of the save, newest first. Assumes a save exists (the route calls ensureSave).
+export async function getEvents(db: GameDb, limit: number): Promise<EventDto[]> {
+  const rows = await db.db.select().from(schema.events).orderBy(desc(schema.events.id)).limit(limit)
+  return rows.map((e) => ({ id: e.id, turn: e.turn, type: e.type, message: e.message, createdAt: e.createdAt }))
+}

lib/game/missions.test.ts

@@ -0,0 +1,295 @@
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { eq } from 'drizzle-orm'
+import { openGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { explorationRng, mulberry32, rollExploration } from './world'
+import { SCHEMA_VERSION, explorePlanet, getWorldState, jumpToSystem } from './save'
+import { acceptMission, MIN_AVAILABLE, REWARD_ITEM_NAME, generateMission, missionRng, pickMissionType, topUpMissionBoard, type MissionDef, type MissionSystem } from './missions'
+
+const dirs: string[] = []
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-missions-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  return { db: await openGameDb(file), file }
+}
+
+afterAll(async () => {
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+// A snapshot with one discovered non-current system to deliver to.
+const SYSTEMS: MissionSystem[] = [
+  { id: 1, name: 'Start', discovered: true, isCurrent: true },
+  { id: 2, name: 'Alpha', discovered: true, isCurrent: false },
+  { id: 3, name: 'Beta', discovered: false, isCurrent: false },
+]
+
+describe('generateMission (pure)', () => {
+  it('DELIVER targets a discovered non-current system and returns null when none exists', () => {
+    const def = generateMission('DELIVER', mulberry32(7), SYSTEMS)!
+    expect(def.type).toBe('DELIVER')
+    expect(def.targetSystemId).toBe(2) // the only candidate
+    expect(def.description).toContain('Alpha')
+
+    expect(generateMission('DELIVER', mulberry32(7), [SYSTEMS[0]])).toBeNull() // only the current system is discovered
+  })
+
+  it('EXPLORE targets 2–4 scans, FIND one item kind; rewards are always 1–3', () => {
+    for (let i = 0; i < 200; i++) {
+      const e = generateMission('EXPLORE', mulberry32(i), SYSTEMS)!
+      expect(e.progressTarget).toBeGreaterThanOrEqual(2)
+      expect(e.progressTarget).toBeLessThanOrEqual(4)
+      expect(e.description).toMatch(/^Scan [2-4] bodies$/)
+
+      const f = generateMission('FIND', mulberry32(i), SYSTEMS)!
+      expect(['resource', 'part']).toContain(f.conditionKind)
+      expect(f.description).toContain(f.conditionKind!)
+
+      for (const d of [e, f]) {
+        expect(d.rewardQty).toBeGreaterThanOrEqual(1)
+        expect(d.rewardQty).toBeLessThanOrEqual(3)
+      }
+    }
+  })
+
+  it('is deterministic — the same (seed, turn) stream generates identical missions', () => {
+    const a = generateMission('DELIVER', missionRng('42', 5), SYSTEMS)
+    const b = generateMission('DELIVER', missionRng('42', 5), SYSTEMS)
+    expect(a).toEqual(b)
+  })
+})
+
+describe('pickMissionType (pure)', () => {
+  it('never picks DELIVER without a target, and does pick it when one exists', () => {
+    for (let i = 0; i < 200; i++) expect(pickMissionType(mulberry32(i), false)).not.toBe('DELIVER')
+
+    const types = new Set(Array.from({ length: 200 }, (_, i) => pickMissionType(mulberry32(i), true)))
+    expect(types.has('DELIVER')).toBe(true)
+    for (const t of types) expect(['DELIVER', 'EXPLORE', 'FIND']).toContain(t)
+  })
+})
+
+describe('topUpMissionBoard', () => {
+  it('seeds a fresh game with MIN_AVAILABLE AVAILABLE non-DELIVER missions and is idempotent', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db) // new game — createNewGame already topped the board up
+
+    const rows = await db.db.select().from(schema.missions)
+    expect(rows).toHaveLength(MIN_AVAILABLE)
+    for (const r of rows) {
+      expect(r.state).toBe('AVAILABLE')
+      expect(r.type).not.toBe('DELIVER') // only the start system is discovered yet — no targets exist
+    }
+
+    await topUpMissionBoard(db) // a second pass inserts nothing
+    expect((await db.db.select().from(schema.missions)).length).toBe(MIN_AVAILABLE)
+  })
+
+  it('generates deterministically from (seed, turn) on a hand-crafted save', async () => {
+    const { db } = await freshFile()
+    // A v6 save with start (current), one discovered neighbour and one undiscovered.
+    await db.db.insert(schema.saves).values({ seed: '42', turn: 5, createdAt: new Date().toISOString(), schemaVersion: SCHEMA_VERSION })
+    const [start] = await db.db.insert(schema.solarSystems).values({ saveId: 1, name: 'Start', x: 50, y: 50, discovered: true, isCurrent: true }).returning()
+    const [alpha] = await db.db.insert(schema.solarSystems).values({ saveId: 1, name: 'Alpha', x: 60, y: 50, discovered: true, isCurrent: false }).returning()
+    const [beta] = await db.db.insert(schema.solarSystems).values({ saveId: 1, name: 'Beta', x: 40, y: 50 }).returning()
+
+    await topUpMissionBoard(db)
+
+    // Replay the same pure pipeline with the same (seed, turn) stream — must match row for row.
+    const snapshot: MissionSystem[] = [
+      { id: start.id, name: 'Start', discovered: true, isCurrent: true },
+      { id: alpha.id, name: 'Alpha', discovered: true, isCurrent: false },
+      { id: beta.id, name: 'Beta', discovered: false, isCurrent: false },
+    ]
+    const rng = missionRng('42', 5)
+    const expected: MissionDef[] = []
+    while (expected.length < MIN_AVAILABLE) {
+      const type = pickMissionType(rng, snapshot.some((s) => s.discovered && !s.isCurrent))
+      expected.push(generateMission(type, rng, snapshot)!)
+    }
+
+    const rows = await db.db.select().from(schema.missions)
+    expect(rows.map((r) => ({ type: r.type, description: r.description, targetSystemId: r.targetSystemId, conditionKind: r.conditionKind, progressTarget: r.progressTarget, rewardKind: r.rewardKind, rewardQty: r.rewardQty }))).toEqual(expected)
+  })
+})
+
+// Inserts a mission row directly so tests can control exactly what the board holds.
+async function insertMission(db: GameDb, fields: { type: string; description: string; targetSystemId?: number | null; conditionKind?: string | null; progressTarget?: number; rewardKind?: string; rewardQty?: number }): Promise<number> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db.insert(schema.missions).values({ saveId: save.id, type: fields.type, description: fields.description, targetSystemId: fields.targetSystemId ?? null, conditionKind: fields.conditionKind ?? null, progressTarget: fields.progressTarget ?? 1, rewardKind: fields.rewardKind ?? 'resource', rewardQty: fields.rewardQty ?? 1 }).returning()
+  return row.id
+}
+
+describe('acceptMission', () => {
+  it('rejects unknown ids with 404 and a second accept while one is active with 409 naming the active mission', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db) // new game — board seeded
+
+    await expect(acceptMission(db, 999)).rejects.toMatchObject({ status: 404 })
+
+    const [a, b] = (await db.db.select().from(schema.missions))
+    await acceptMission(db, a.id)
+    await expect(acceptMission(db, a.id)).rejects.toMatchObject({ status: 409, message: /already active/i }) // re-accepting the active one
+    await expect(acceptMission(db, b.id)).rejects.toMatchObject({ status: 409, message: /One mission at a time/ })
+  })
+
+  it('activates an AVAILABLE contract, spends no turn, writes an event and keeps the board topped up', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db)
+    const [save] = await db.db.select().from(schema.saves).limit(1)
+    const [a] = await db.db.select().from(schema.missions)
+
+    const board = await acceptMission(db, a.id)
+
+    expect(board.find((m) => m.id === a.id)!.state).toBe('ACTIVE')
+    expect(board.filter((m) => m.state === 'AVAILABLE').length).toBeGreaterThanOrEqual(MIN_AVAILABLE) // topped back up
+    const [after] = await db.db.select().from(schema.saves).limit(1)
+    expect(after.turn).toBe(save.turn) // free — no turn cost
+
+    const event = (await db.db.select().from(schema.events)).find((e) => e.type === 'mission')!
+    expect(event.message).toContain('Accepted mission')
+    expect(event.turn).toBe(save.turn) // stamped at the current turn — accept spends none
+  })
+})
+
+describe('completion', () => {
+  it('EXPLORE counts scans, completes at the target and grants the reward into the hold', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db) // new game — empty inventory, all bodies unexplored
+    const id = await insertMission(db, { type: 'EXPLORE', description: 'Scan 3 bodies', progressTarget: 3, rewardKind: 'part', rewardQty: 2 })
+
+    await acceptMission(db, id)
+    const planets = (await db.db.select().from(schema.planets)).filter((p) => p.parentId === null)
+    await explorePlanet(db, planets[0].id)
+    let mission = (await db.db.select().from(schema.missions)).find((m) => m.id === id)!
+    expect(mission.state).toBe('ACTIVE')
+    expect(mission.progress).toBe(1)
+
+    await explorePlanet(db, planets[1].id)
+    mission = (await db.db.select().from(schema.missions)).find((m) => m.id === id)!
+    expect(mission.state).toBe('ACTIVE')
+    expect(mission.progress).toBe(2)
+
+    await explorePlanet(db, planets[2].id) // third scan — completes
+    mission = (await db.db.select().from(schema.missions)).find((m) => m.id === id)!
+    expect(mission.state).toBe('DONE')
+    expect(mission.progress).toBe(3)
+
+    const reward = (await db.db.select().from(schema.inventoryItems)).find((i) => i.name === REWARD_ITEM_NAME)!
+    expect(reward.kind).toBe('part')
+    expect(reward.qty).toBe(2)
+
+    const event = (await db.db.select().from(schema.events)).find((e) => e.type === 'mission' && /complete/i.test(e.message))!
+    expect(event.turn).toBe(3) // free accept (turn 0) + three scans (1–3); completion is written by the third scan
+    expect(event.message).toContain('Scan 3 bodies')
+  })
+
+  it('FIND completes when a haul contains its kind and ignores scans that do not', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db)
+    const [save] = await db.db.select().from(schema.saves).limit(1)
+    const id = await insertMission(db, { type: 'FIND', description: 'Find at least one part while scanning', conditionKind: 'part', rewardKind: 'resource', rewardQty: 3 })
+
+    // Pick bodies by their deterministic per-planet rolls — one without parts first (no progress),
+    // then one with (completes).
+    const planets = await db.db.select().from(schema.planets)
+    const haulOf = (p: { id: number }) => rollExploration(explorationRng(save.seed, p.id))
+    const noPart = planets.find((p) => !haulOf(p).some((i) => i.kind === 'part'))!
+    expect(noPart).toBeDefined()
+    const withPart = planets.find((p) => haulOf(p).some((i) => i.kind === 'part'))!
+    expect(withPart).toBeDefined()
+
+    await acceptMission(db, id)
+    await explorePlanet(db, noPart.id) // haul has no parts — the mission does not advance
+    let mission = (await db.db.select().from(schema.missions)).find((m) => m.id === id)!
+    expect(mission.state).toBe('ACTIVE')
+    expect(mission.progress).toBe(0)
+
+    await explorePlanet(db, withPart.id) // haul has parts — completes
+    mission = (await db.db.select().from(schema.missions)).find((m) => m.id === id)!
+    expect(mission.state).toBe('DONE')
+
+    const reward = (await db.db.select().from(schema.inventoryItems)).find((i) => i.name === REWARD_ITEM_NAME)!
+    expect(reward.kind).toBe('resource')
+    expect(reward.qty).toBe(3)
+  })
+
+  it('DELIVER completes on arrival at its target system', async () => {
+    const { db } = await freshFile()
+    const world = await getWorldState(db) // new game — start is current, six undiscovered neighbours
+    const [start] = await db.db.select().from(schema.solarSystems).where(eq(schema.solarSystems.isCurrent, true))
+    const neighbor = world.systems.find((s) => !s.discovered)!
+
+    await jumpToSystem(db, neighbor.id) // start is now discovered + non-current — a valid target
+    const id = await insertMission(db, { type: 'DELIVER', description: `Jump to ${start.name}`, targetSystemId: start.id, rewardKind: 'resource', rewardQty: 1 })
+
+    await acceptMission(db, id)
+
+    // Wrong destination: one of the ring neighbours generated around `neighbor` on the first jump.
+    const world2 = await getWorldState(db)
+    const wrongEdge = world2.edges.find(([a, b]) => (a === neighbor.id || b === neighbor.id) && a !== start.id && b !== start.id)!
+    const wrongId = wrongEdge[0] === neighbor.id ? wrongEdge[1] : wrongEdge[0]
+    await jumpToSystem(db, wrongId) // not the target — no completion
+    expect((await db.db.select().from(schema.missions)).find((m) => m.id === id)!.state).toBe('ACTIVE')
+
+    await jumpToSystem(db, neighbor.id) // back through `neighbor`…
+    const result = await jumpToSystem(db, start.id) // …to the target — completes
+    const mission = (await db.db.select().from(schema.missions)).find((m) => m.id === id)!
+    expect(mission.state).toBe('DONE')
+    expect(result.systems.find((s) => s.current)?.id).toBe(start.id)
+
+    const reward = (await db.db.select().from(schema.inventoryItems)).find((i) => i.name === REWARD_ITEM_NAME)!
+    expect(reward.kind).toBe('resource')
+    expect(reward.qty).toBe(1)
+  })
+
+  it('rewards of the same kind accumulate into one hold row across missions', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db)
+    const a = await insertMission(db, { type: 'EXPLORE', description: 'Scan 2 bodies', progressTarget: 2, rewardKind: 'resource', rewardQty: 2 })
+    const b = await insertMission(db, { type: 'EXPLORE', description: 'Scan 2 more bodies', progressTarget: 2, rewardKind: 'resource', rewardQty: 3 })
+    const planets = (await db.db.select().from(schema.planets)).filter((p) => p.parentId === null)
+
+    await acceptMission(db, a)
+    await explorePlanet(db, planets[0].id)
+    await explorePlanet(db, planets[1].id) // completes A — 2× resource reward
+    expect((await db.db.select().from(schema.missions)).find((m) => m.id === a)!.state).toBe('DONE')
+
+    await acceptMission(db, b)
+    await explorePlanet(db, planets[2].id)
+    await explorePlanet(db, planets[3].id) // completes B — 3× more of the same kind+name
+    expect((await db.db.select().from(schema.missions)).find((m) => m.id === b)!.state).toBe('DONE')
+
+    const rewards = (await db.db.select().from(schema.inventoryItems)).filter((i) => i.name === REWARD_ITEM_NAME)
+    expect(rewards).toHaveLength(1) // accumulated, not a second row
+    expect(rewards[0].qty).toBe(5)
+  })
+})
+
+describe('backfill v6', () => {
+  it('seeds the board on a pre-#10 save when it opens — deterministic and idempotent', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db) // new game at the current version
+
+    // Simulate a save created by pre-v6 code: no mission rows, stamped v5.
+    await db.db.delete(schema.missions)
+    await db.db.update(schema.saves).set({ schemaVersion: 5 })
+
+    await getWorldState(db) // ensureSave → backfill runs the v6 step
+
+    const rows = await db.db.select().from(schema.missions)
+    expect(rows).toHaveLength(MIN_AVAILABLE)
+    for (const r of rows) expect(r.state).toBe('AVAILABLE')
+    const [save] = await db.db.select().from(schema.saves)
+    expect(save.schemaVersion).toBe(SCHEMA_VERSION)
+
+    // Idempotent — a second pass changes nothing.
+    await getWorldState(db)
+    expect((await db.db.select().from(schema.missions)).length).toBe(MIN_AVAILABLE)
+  })
+})

lib/game/missions.ts

@@ -0,0 +1,204 @@
+import { eq } from 'drizzle-orm'
+import * as schema from '@/lib/db/schema'
+import { persist, type GameDb } from '@/lib/db/client'
+import { mulberry32, type FoundItem } from './world'
+
+// Mission board (#10): contracts generated deterministically from the save seed. Three types —
+// DELIVER (jump to a target system), EXPLORE (scan N bodies), FIND (haul in an item of one kind).
+// One mission is ACTIVE at a time; the board always holds MIN_AVAILABLE AVAILABLE contracts.
+// The pure helpers below are DB-free so generation/completion rules stay unit-testable alone.
+
+export type MissionType = 'DELIVER' | 'EXPLORE' | 'FIND'
+export type ItemKind = 'resource' | 'part'
+export type MissionStateName = 'AVAILABLE' | 'ACTIVE' | 'DONE'
+
+// The board never drops below this many AVAILABLE contracts (topped up after every action).
+export const MIN_AVAILABLE = 3
+
+// What generation produces and the DB stores — one row per mission.
+export interface MissionDef {
+  type: MissionType
+  description: string
+  targetSystemId: number | null // DELIVER only
+  conditionKind: ItemKind | null // FIND only
+  progressTarget: number // EXPLORE: scans required; 1 for the others
+  rewardKind: ItemKind
+  rewardQty: number // 1–3, consistent with exploration hauls
+}
+
+// A system as far as generation cares about.
+export interface MissionSystem {
+  id: number
+  name: string
+  discovered: boolean
+  isCurrent: boolean
+}
+
+// Deterministic per (seed, turn) — same anchoring style as world expansion in save.ts.
+// Turn-advancing actions re-anchor the stream, so top-ups on different turns generate
+// different contracts. Mission accept is free and tops up at the current turn, so it may
+// share an anchor with a top-up that already ran at that turn (e.g. the new-game seed at
+// turn 0) — the generated contract can then mirror an existing one: cosmetic, never a
+// double reward (rewards are per row).
+export function missionRng(seed: string, turn: number): () => number {
+  return mulberry32((Number(seed) + Math.imul(turn, 0x9e3779b1)) >>> 0)
+}
+
+// Which type to generate next: DELIVER when a target exists and the coin says so, else EXPLORE/FIND.
+export function pickMissionType(rng: () => number, canDeliver: boolean): MissionType {
+  if (canDeliver && rng() < 0.5) return 'DELIVER'
+  return rng() < 0.5 ? 'EXPLORE' : 'FIND'
+}
+
+// One mission of the given type from the current world snapshot. DELIVER returns null when no
+// discovered non-current system exists to target (e.g. a brand-new game).
+export function generateMission(type: MissionType, rng: () => number, systems: MissionSystem[]): MissionDef | null {
+  const rewardKind: ItemKind = rng() < 0.5 ? 'resource' : 'part'
+  const rewardQty = 1 + Math.floor(rng() * 3) // 1–3
+
+  if (type === 'DELIVER') {
+    const candidates = systems.filter((s) => s.discovered && !s.isCurrent)
+    if (candidates.length === 0) return null
+    const target = candidates[Math.floor(rng() * candidates.length)]
+    return { type, description: `Jump to ${target.name}`, targetSystemId: target.id, conditionKind: null, progressTarget: 1, rewardKind, rewardQty }
+  }
+  if (type === 'EXPLORE') {
+    const scans = 2 + Math.floor(rng() * 3) // 2–4
+    return { type, description: `Scan ${scans} bodies`, targetSystemId: null, conditionKind: null, progressTarget: scans, rewardKind, rewardQty }
+  }
+  const kind: ItemKind = rng() < 0.5 ? 'resource' : 'part'
+  return { type, description: `Find at least one ${kind} while scanning`, targetSystemId: null, conditionKind: kind, progressTarget: 1, rewardKind, rewardQty }
+}
+
+// What an action did to the world — what completion checks run against.
+export interface MissionAction {
+  jumpedTo?: number // system id reached by a jump
+  outcome?: FoundItem[] // haul from a scan
+}
+
+// How far an action advances a mission: new progress, or null when the action doesn't touch it.
+// DELIVER completes on arrival at its target; EXPLORE counts every scan (capped); FIND completes
+// when a haul contains its kind.
+export function advanceMission(
+  mission: { type: MissionType; targetSystemId: number | null; conditionKind: ItemKind | null; progressTarget: number; progress: number },
+  action: MissionAction,
+): number | null {
+  if (action.jumpedTo !== undefined) {
+    return mission.type === 'DELIVER' && mission.targetSystemId === action.jumpedTo ? 1 : null
+  }
+  if (mission.type === 'EXPLORE') return Math.min(mission.progressTarget, mission.progress + 1)
+  if (mission.type === 'FIND' && mission.conditionKind !== null && (action.outcome ?? []).some((i) => i.kind === mission.conditionKind)) return 1
+  return null
+}
+
+// --- DB layer -----------------------------------------------------------------
+
+export interface MissionDto extends MissionDef {
+  id: number
+  progress: number
+  state: MissionStateName
+}
+
+// Carries an HTTP status so route handlers can map failures to responses without re-parsing.
+export class MissionError extends Error {
+  constructor(
+    public readonly status: number,
+    message: string,
+  ) {
+    super(message)
+  }
+}
+
+async function readMissions(db: GameDb): Promise<MissionDto[]> {
+  return (await db.db.select().from(schema.missions)).map((m) => ({
+    id: m.id,
+    type: m.type as MissionType,
+    description: m.description,
+    targetSystemId: m.targetSystemId,
+    conditionKind: m.conditionKind as ItemKind | null,
+    progressTarget: m.progressTarget,
+    progress: m.progress,
+    rewardKind: m.rewardKind as ItemKind,
+    rewardQty: m.rewardQty,
+    state: m.state as MissionStateName,
+  }))
+}
+
+// The board for the MISSIONS tab. Assumes a save exists (routes call ensureSave first) and tops
+// the AVAILABLE list up before reading so the tab always has contracts to offer.
+export async function getMissions(db: GameDb): Promise<MissionDto[]> {
+  await topUpMissionBoard(db)
+  return readMissions(db)
+}
+
+// Keeps at least MIN_AVAILABLE AVAILABLE missions on the board, generating deterministically from
+// (seed, turn). Idempotent — a second call with a full list inserts nothing.
+export async function topUpMissionBoard(db: GameDb): Promise<void> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  if (!save) return
+  const systems = (await db.db.select().from(schema.solarSystems)).map((s) => ({ id: s.id, name: s.name, discovered: s.discovered, isCurrent: s.isCurrent }))
+
+  let available = (await db.db.select({ state: schema.missions.state }).from(schema.missions)).filter((m) => m.state === 'AVAILABLE').length
+  if (available >= MIN_AVAILABLE) return
+
+  const rng = missionRng(save.seed, save.turn)
+  while (available < MIN_AVAILABLE) {
+    const type = pickMissionType(rng, systems.some((s) => s.discovered && !s.isCurrent))
+    const def = generateMission(type, rng, systems)
+    if (!def) break // no DELIVER target — the other types always generate
+    await db.db.insert(schema.missions).values({ saveId: save.id, type: def.type, description: def.description, targetSystemId: def.targetSystemId, conditionKind: def.conditionKind, progressTarget: def.progressTarget, rewardKind: def.rewardKind, rewardQty: def.rewardQty })
+    available += 1
+  }
+}
+
+// Mission rewards are granted under one neutral name — spenders (ship actions, research) consume by kind only.
+export const REWARD_ITEM_NAME = 'MISSION REWARD'
+
+const kindLabel = (kind: ItemKind): string => (kind === 'resource' ? 'RESOURCES' : 'PARTS')
+
+// Accepts an AVAILABLE contract: it becomes THE active mission (one at a time). Instant and
+// free (JC-19) — no turn, no cost; the event is stamped at the current turn. Returns the fresh
+// board.
+export async function acceptMission(db: GameDb, missionId: number): Promise<MissionDto[]> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  if (!save) throw new MissionError(404, 'No save yet')
+  const rows = await readMissions(db)
+  const target = rows.find((m) => m.id === missionId)
+  if (!target) throw new MissionError(404, `Unknown mission ${missionId}`)
+  if (target.state !== 'AVAILABLE') throw new MissionError(409, `${target.description} is already ${target.state.toLowerCase()}`)
+  const active = rows.find((m) => m.state === 'ACTIVE')
+  if (active) throw new MissionError(409, `One mission at a time — finish "${active.description}" first`)
+
+  await db.db.update(schema.missions).set({ state: 'ACTIVE' }).where(eq(schema.missions.id, target.id))
+  await db.db.insert(schema.events).values({ saveId: save.id, turn: save.turn, type: 'mission', message: `Accepted mission — ${target.description}`, createdAt: new Date().toISOString() })
+  await topUpMissionBoard(db) // one contract left the AVAILABLE list — keep the board topped up
+  await persist(db)
+
+  return readMissions(db)
+}
+
+// Runs after a jump or scan: advances the ACTIVE mission (if any) and, on completion, marks it
+// DONE, grants its reward into the cargo hold and writes an event. Called from save.ts inside the
+// action that triggered it, before persist — so everything lands in one atomic write.
+export async function checkMissionCompletion(db: GameDb, saveId: number, turn: number, action: MissionAction): Promise<void> {
+  const row = (await db.db.select().from(schema.missions)).find((m) => m.state === 'ACTIVE')
+  if (!row) return
+
+  const active = { type: row.type as MissionType, targetSystemId: row.targetSystemId, conditionKind: row.conditionKind as ItemKind | null, progressTarget: row.progressTarget, progress: row.progress }
+  const newProgress = advanceMission(active, action)
+  if (newProgress === null) return
+
+  if (newProgress >= active.progressTarget) {
+    await db.db.update(schema.missions).set({ state: 'DONE', progress: newProgress }).where(eq(schema.missions.id, row.id))
+    // The reward lands in the hold like any haul — same kind+name accumulates into one row.
+    const existing = (await db.db.select().from(schema.inventoryItems)).find((i) => i.kind === row.rewardKind && i.name === REWARD_ITEM_NAME)
+    if (existing) {
+      await db.db.update(schema.inventoryItems).set({ qty: existing.qty + row.rewardQty }).where(eq(schema.inventoryItems.id, existing.id))
+    } else {
+      await db.db.insert(schema.inventoryItems).values({ saveId, kind: row.rewardKind, name: REWARD_ITEM_NAME, qty: row.rewardQty })
+    }
+    await db.db.insert(schema.events).values({ saveId, turn, type: 'mission', message: `Mission complete — ${row.description} (+${row.rewardQty}× ${kindLabel(row.rewardKind as ItemKind)})`, createdAt: new Date().toISOString() })
+  } else {
+    await db.db.update(schema.missions).set({ progress: newProgress }).where(eq(schema.missions.id, row.id))
+  }
+}

lib/game/research.test.ts

@@ -0,0 +1,220 @@
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { eq } from 'drizzle-orm'
+import { openGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { BUILD_PART_COST, MAX_LEVEL, upgradeCost } from './ship-costs'
+import { buildSystem, getShipState, spendItems, upgradeSystem, type ShipState } from './ship'
+import { TECHS } from './tech'
+import { SCHEMA_VERSION } from './save'
+import { getTechState, researchTech, resolveResearchTask } from './research'
+import type { Task } from './tasks'
+
+const dirs: string[] = []
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-research-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  return { db: await openGameDb(file), file }
+}
+
+afterAll(async () => {
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+async function addItem(db: GameDb, kind: 'resource' | 'part', name: string, qty: number): Promise<void> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  await db.db.insert(schema.inventoryItems).values({ saveId: save.id, kind, name, qty })
+}
+
+const systemOf = (state: ShipState, type: string): ShipState['systems'][number] => state.systems.find((s) => s.type === type)!
+
+describe('getTechState', () => {
+  it('new game: every tech seeded — roots AVAILABLE, chained ones LOCKED naming the missing prereq', async () => {
+    const { db } = await freshFile()
+    const techs = await getTechState(db)
+
+    expect(techs).toHaveLength(TECHS.length)
+    for (const def of TECHS) {
+      const t = techs.find((x) => x.slug === def.slug)!
+      if (def.prereqs.length === 0) {
+        expect(t.state).toBe('AVAILABLE')
+        expect(t.missingPrereqs).toEqual([])
+      } else {
+        expect(t.state).toBe('LOCKED')
+        expect(t.missingPrereqs).toEqual(def.prereqs.map((slug) => TECHS.find((x) => x.slug === slug)!.name))
+      }
+    }
+  })
+})
+
+describe('researchTech', () => {
+  it('rejects unknown id with 404, locked techs with 409 naming the missing prereq, and re-research with 409', async () => {
+    const { db } = await freshFile()
+    const techs = await getTechState(db)
+
+    await expect(researchTech(db, 999)).rejects.toMatchObject({ status: 404 })
+
+    const plasma = techs.find((t) => t.slug === 'PLASMA_CANNON')! // locked behind WEAPONS SYSTEMS
+    await expect(researchTech(db, plasma.id)).rejects.toMatchObject({ status: 409, message: /WEAPONS SYSTEMS/ })
+
+    const weapons = techs.find((t) => t.slug === 'WEAPONS_SYSTEMS')!
+    await addItem(db, 'part', 'SERVO ACTUATOR', weapons.costQty)
+    await researchTech(db, weapons.id)
+    await expect(researchTech(db, weapons.id)).rejects.toMatchObject({ status: 409 }) // already researched
+  })
+
+  it('validates the cost against the hold — 422 with no mutation when short', async () => {
+    const { db } = await freshFile()
+    const techs = await getTechState(db)
+    const nav = techs.find((t) => t.slug === 'NAV_AI')! // resource×2, root
+    const before = await getShipState(db)
+
+    await expect(researchTech(db, nav.id)).rejects.toMatchObject({ status: 422 })
+
+    expect((await getShipState(db)).turn).toBe(before.turn) // no turn spent on a failed research
+    expect((await db.db.select().from(schema.tech)).find((t) => t.slug === 'NAV_AI')!.researched).toBe(false)
+  })
+
+  it('spends the cost from the oldest row first, persists researched state, costs a turn and writes an event', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    await addItem(db, 'resource', 'IRON ORE', 1) // oldest — fully consumed by the cost of 2
+    await addItem(db, 'resource', 'CRYSTAL DUST', 5)
+
+    const techs = await getTechState(db)
+    const nav = techs.find((t) => t.slug === 'NAV_AI')!
+    const result = await researchTech(db, nav.id)
+
+    expect(result.find((t) => t.slug === 'NAV_AI')!.state).toBe('RESEARCHED')
+    expect((await db.db.select().from(schema.inventoryItems)).map((i) => [i.name, i.qty])).toEqual([['CRYSTAL DUST', 4]]) // IRON ORE row deleted
+    expect((await getShipState(db)).turn).toBe(1)
+
+    const event = (await db.db.select().from(schema.events)).find((e) => e.type === 'research')!
+    expect(event.turn).toBe(1)
+    expect(event.message).toContain('NAVIGATION AI')
+
+    // Persisted: a fresh read still shows it researched.
+    expect((await getTechState(db)).find((t) => t.slug === 'NAV_AI')!.state).toBe('RESEARCHED')
+  })
+
+  it('unlocks the next chain step once its prerequisite is researched', async () => {
+    const { db } = await freshFile()
+    await getTechState(db) // ensureSave — the save must exist before items can be added
+    await addItem(db, 'part', 'SERVO ACTUATOR', 5) // WEAPONS SYSTEMS (2) + PLASMA CANNON (3)
+    let techs = await getTechState(db)
+
+    expect(techs.find((t) => t.slug === 'PLASMA_CANNON')!.state).toBe('LOCKED')
+    await researchTech(db, techs.find((t) => t.slug === 'WEAPONS_SYSTEMS')!.id)
+
+    techs = await getTechState(db)
+    expect(techs.find((t) => t.slug === 'PLASMA_CANNON')!.state).toBe('AVAILABLE') // prereq met → researchable now
+    await researchTech(db, techs.find((t) => t.slug === 'PLASMA_CANNON')!.id)
+    expect((await getTechState(db)).find((t) => t.slug === 'PLASMA_CANNON')!.state).toBe('RESEARCHED')
+  })
+})
+
+describe('gating of ship actions', () => {
+  it('WEAPONS build is 409 until the WEAPONS SYSTEMS tech is researched, then succeeds', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    await addItem(db, 'part', 'SERVO ACTUATOR', BUILD_PART_COST + 2) // research (2) + build (3)
+
+    await expect(buildSystem(db, 'WEAPONS')).rejects.toMatchObject({ status: 409, message: /requires/ }) // gated — even with parts in the hold
+    const techs = await getTechState(db)
+    await researchTech(db, techs.find((t) => t.slug === 'WEAPONS_SYSTEMS')!.id)
+
+    const state = await buildSystem(db, 'WEAPONS')
+    expect(systemOf(state, 'WEAPONS').built).toBe(true)
+  })
+
+  it('raises the REACTOR upgrade cap once REACTOR OVERCLOCK is researched', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    const reactorId = systemOf(await getShipState(db), 'REACTOR').id
+    await db.db.update(schema.shipSystems).set({ level: MAX_LEVEL }).where(eq(schema.shipSystems.id, reactorId)) // at the base cap
+
+    await expect(upgradeSystem(db, reactorId)).rejects.toMatchObject({ status: 409 })
+
+    await addItem(db, 'resource', 'IRON ORE', 3 + upgradeCost(MAX_LEVEL)) // research cost (3) + upgrade cost at level 5
+    const techs = await getTechState(db)
+    await researchTech(db, techs.find((t) => t.slug === 'REACTOR_OVERCLOCK')!.id)
+
+    const state = await upgradeSystem(db, reactorId) // the raised cap admits one more level
+    expect(systemOf(state, 'REACTOR').level).toBe(MAX_LEVEL + 1)
+  })
+})
+
+// --- A/B: resolver vs the legacy immediate action (Task 4a) ---------------------------
+const T0 = '2026-10-01T00:00:00.000Z'
+
+// Stamped save (no backfill), the full tech tree, nothing researched yet. Identical build
+// per world → ids line up.
+async function buildResearchFixture(db: GameDb): Promise<void> {
+  const [save] = await db.db.insert(schema.saves).values({ seed: '42', turn: 0, createdAt: T0, schemaVersion: SCHEMA_VERSION }).returning()
+  for (const def of TECHS) {
+    await db.db.insert(schema.tech).values({ saveId: save.id, slug: def.slug, name: def.name, costKind: def.costKind, costQty: def.costQty, prerequisites: def.prereqs.join(','), effect: def.effect })
+  }
+}
+
+const task = (payload: object): Task =>
+  ({ id: 0, saveId: 0, type: 'RESEARCH', payload: JSON.stringify(payload), leadCrewId: 0, helpers: [], duration: 0, remaining: 0, status: 'ACTIVE', queuedAtTurn: 0 })
+
+async function snapshot(db: GameDb): Promise<string> {
+  const [saves, systems, routes, planets, inventory, crew, ship, tech, missions, events] = await Promise.all([
+    db.db.select({ id: schema.saves.id, seed: schema.saves.seed, turn: schema.saves.turn, schemaVersion: schema.saves.schemaVersion }).from(schema.saves),
+    db.db.select().from(schema.solarSystems),
+    db.db.select().from(schema.jumpRoutes),
+    db.db.select().from(schema.planets),
+    db.db.select().from(schema.inventoryItems),
+    db.db.select().from(schema.crew),
+    db.db.select().from(schema.shipSystems),
+    db.db.select().from(schema.tech),
+    db.db.select().from(schema.missions),
+    db.db.select({ id: schema.events.id, turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events),
+  ])
+  return JSON.stringify({ saves, systems, routes, planets, inventory, crew, ship, tech, missions, events })
+}
+
+describe('resolveResearchTask (A/B against researchTech)', () => {
+  // A = legacy immediate action (validates, deducts the cost, +1 turn, marks researched,
+  // event). B = the queued shape: the cost was deducted at queue time (Task 3), the tick
+  // advanced the turn (Task 4b), then the resolver marks the tech. Same starting world →
+  // byte-identical end states.
+
+  it('lands exactly what researchTech lands', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    await buildResearchFixture(a)
+    await buildResearchFixture(b)
+    await addItem(a, 'resource', 'IRON ORE', 2) // NAVIGATION AI costs 2 resources
+    await addItem(b, 'resource', 'IRON ORE', 2)
+
+    const [navA] = await a.db.select().from(schema.tech).where(eq(schema.tech.slug, 'NAV_AI'))
+    const [navB] = await b.db.select().from(schema.tech).where(eq(schema.tech.slug, 'NAV_AI'))
+    await researchTech(a, navA.id)
+    await spendItems(b, 1, 'resource', 2) // the queue-time deduction
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+    await resolveResearchTask(b, task({ techId: navB.id }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+    expect((await b.db.select().from(schema.tech)).find((t) => t.id === navB.id)?.researched).toBe(true)
+    const ev = (await b.db.select({ turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events)).find((e) => e.type === 'research')!
+    expect(ev.turn).toBe(1)
+    expect(ev.message).toBe('Researched NAVIGATION AI (cost: 2× resources)')
+  })
+
+  it('guards: 404 unknown tech, 409 already researched (prereqs are monotone — no guard needed)', async () => {
+    const { db } = await freshFile()
+    await buildResearchFixture(db)
+    const [nav] = await db.db.select().from(schema.tech).where(eq(schema.tech.slug, 'NAV_AI'))
+    await db.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+
+    await expect(resolveResearchTask(db, task({ techId: 999 }))).rejects.toMatchObject({ status: 404, message: 'Unknown tech 999' })
+    await resolveResearchTask(db, task({ techId: nav.id }))
+    await expect(resolveResearchTask(db, task({ techId: nav.id }))).rejects.toMatchObject({ status: 409, message: 'NAVIGATION AI is already researched' })
+  })
+})

lib/game/research.ts

@@ -0,0 +1,118 @@
+import { eq } from 'drizzle-orm'
+import * as schema from '@/lib/db/schema'
+import { persist, type GameDb } from '@/lib/db/client'
+import { EFFECTS, TECHS, techStatus, type TechDto } from './tech'
+import { ensureSave } from './save'
+import { ShipError, spendItems } from './ship'
+import type { Task, TaskType } from './tasks'
+
+// Technology research: the SKILL TREE tab's read + action. Researching a tech costs inventory
+// items (oldest row first, like ship actions) plus a turn, and its unlock effect then gates or
+// raises ship actions (enforced in lib/game/ship.ts via the same pure helpers).
+
+// Carries an HTTP status so route handlers can map failures to responses without re-parsing.
+export class ResearchError extends Error {
+  constructor(
+    public readonly status: number,
+    message: string,
+  ) {
+    super(message)
+  }
+}
+
+async function researchedSlugs(db: GameDb): Promise<Set<string>> {
+  return new Set((await db.db.select().from(schema.tech)).filter((t) => t.researched).map((t) => t.slug))
+}
+
+// The full tech tree with per-save state — RESEARCHED / AVAILABLE / LOCKED (with the missing
+// prerequisite names when locked). Auto-initializes like the other reads.
+export async function getTechState(db: GameDb): Promise<TechDto[]> {
+  await ensureSave(db)
+  const rows = await db.db.select().from(schema.tech)
+  const researched = new Set(rows.filter((t) => t.researched).map((t) => t.slug))
+  return TECHS.map((def) => {
+    const row = rows.find((r) => r.slug === def.slug)! // seeded on new game / backfill v5
+    const { state, missingPrereqs } = techStatus(def, researched)
+    return {
+      id: row.id,
+      slug: def.slug,
+      name: def.name,
+      costKind: def.costKind,
+      costQty: def.costQty,
+      prereqs: def.prereqs.map((slug) => TECHS.find((t) => t.slug === slug)?.name ?? slug),
+      effect: EFFECTS[def.effect]?.description ?? def.effect,
+      state,
+      missingPrereqs,
+    }
+  })
+}
+
+function syntheticTask(type: TaskType, payload: object): Task {
+  return { id: 0, saveId: 0, type, payload: JSON.stringify(payload), leadCrewId: 0, helpers: [], duration: 0, remaining: 0, status: 'ACTIVE', queuedAtTurn: 0 }
+}
+
+// RESEARCH — mark the payload's tech researched at the current turn. No cost here (deducted
+// at queue time — Task 3 — or by researchTech before delegating); no mission hooks (the
+// current action has none).
+export async function resolveResearchTask(db: GameDb, task: Task): Promise<void> {
+  await ensureSave(db)
+  const { techId } = JSON.parse(task.payload) as { techId: number }
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const rows = await db.db.select().from(schema.tech)
+  const target = rows.find((t) => t.id === techId)
+  if (!target) throw new ResearchError(404, `Unknown tech ${techId}`)
+
+  const def = TECHS.find((t) => t.slug === target.slug)!
+  if (target.researched) throw new ResearchError(409, `${def.name} is already researched`)
+
+  await db.db.update(schema.tech).set({ researched: true }).where(eq(schema.tech.id, target.id))
+  await db.db.insert(schema.events).values({ saveId: save.id, turn: save.turn, type: 'research', message: `Researched ${def.name} (cost: ${def.costQty}× ${def.costKind === 'resource' ? 'resources' : 'parts'})`, createdAt: new Date().toISOString() })
+  await persist(db)
+}
+
+// The research pre-checks, extracted for the queueing route (5a(ii)): the same codes and
+// messages as researchTech — unknown tech (404), already researched (409), missing prereqs
+// (409, naming what is missing). The cost check stays out: the queueing path deducts at
+// queue time (queueTask) and the research lands when the task completes on the tick.
+export async function checkResearchPreconditions(db: GameDb, techId: number): Promise<void> {
+  await ensureSave(db)
+  const rows = await db.db.select().from(schema.tech)
+  const target = rows.find((t) => t.id === techId)
+  if (!target) throw new ResearchError(404, `Unknown tech ${techId}`)
+
+  const def = TECHS.find((t) => t.slug === target.slug)!
+  const researched = await researchedSlugs(db)
+  if (researched.has(def.slug)) throw new ResearchError(409, `${def.name} is already researched`)
+  const missing = def.prereqs.filter((p) => !researched.has(p)).map((slug) => TECHS.find((t) => t.slug === slug)?.name ?? slug)
+  if (missing.length > 0) throw new ResearchError(409, `${def.name} requires ${missing.join(' and ')} first`)
+}
+
+// Research one tech: validates prerequisites (409, naming what is missing) and the cost (422),
+// spends it from the cargo hold, then delegates the unlock to the resolver at the new turn.
+export async function researchTech(db: GameDb, techId: number): Promise<TechDto[]> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const rows = await db.db.select().from(schema.tech)
+  const target = rows.find((t) => t.id === techId)
+  if (!target) throw new ResearchError(404, `Unknown tech ${techId}`)
+
+  const def = TECHS.find((t) => t.slug === target.slug)!
+  const researched = await researchedSlugs(db)
+  if (researched.has(def.slug)) throw new ResearchError(409, `${def.name} is already researched`)
+  const missing = def.prereqs.filter((p) => !researched.has(p)).map((slug) => TECHS.find((t) => t.slug === slug)?.name ?? slug)
+  if (missing.length > 0) throw new ResearchError(409, `${def.name} requires ${missing.join(' and ')} first`)
+
+  try {
+    await spendItems(db, save.id, def.costKind, def.costQty)
+  } catch (err) {
+    // spendItems throws ShipError(422) on a short hold — re-throw as this domain's error.
+    if (err instanceof ShipError) throw new ResearchError(err.status, err.message)
+    throw err
+  }
+
+  const turn = save.turn + 1
+  await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
+  await resolveResearchTask(db, syntheticTask('RESEARCH', { techId }))
+
+  return getTechState(db)
+}

lib/game/save.test.ts

@@ -2,9 +2,16 @@ import { mkdtemp, rm } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import path from 'node:path'
 import { afterAll, describe, expect, it } from 'vitest'
+import { eq } from 'drizzle-orm'
 import { openGameDb, type GameDb } from '@/lib/db/client'
 import * as schema from '@/lib/db/schema'
-import { getSystemState, explorePlanet, getWorldState, jumpToSystem, type WorldState } from './save'
+import { generateStartingCrew, rollCrewMember, startingCrewRng } from './crew'
+import { MIN_AVAILABLE } from './missions'
+import { BASE_CAPACITY, BASE_LEVEL, SHIP_TYPES } from './ship-costs'
+import { TECHS } from './tech'
+import { SCHEMA_VERSION, getCrewState, getSystemState, explorePlanet, getWorldState, jumpToSystem, resolveJumpTask, resolveExploreTask, runTurn, type WorldState } from './save'
+import { addCrew, buildWorldFixture, insertTaskRow } from './test-fixtures'
+import type { Task } from './tasks'
 import { bodyRng, explorationRng, generatePlanets, rollExploration } from './world'
 
 const dirs: string[] = []
@@ -228,3 +235,536 @@ describe('explorePlanet', () => {
     expect(state.turn).toBe(planetIds.length) // one turn per scan
   })
 })
+
+describe('getCrewState', () => {
+  it('seeds a starting crew of 2–3 members derived from the save seed', async () => {
+    const { db } = await freshFile()
+    const crew = (await getCrewState(db)).crew // ensureSave runs inside, so this also seeds the crew (the roster moved under .crew — JC-7)
+
+    expect(crew.length).toBeGreaterThanOrEqual(2)
+    expect(crew.length).toBeLessThanOrEqual(3)
+    for (const member of crew) {
+      expect(member.origin).toBe('STARTING CREW')
+      expect(member.name.trim()).not.toBe('')
+      expect(member.role.trim()).not.toBe('')
+      expect(member.traitGood.trim()).not.toBe('')
+      expect(member.traitBad.trim()).not.toBe('')
+    }
+
+    // The roster is exactly the pure generation for this save's seed.
+    const [save] = await db.db.select().from(schema.saves)
+    const expected = generateStartingCrew(startingCrewRng(save.seed))
+    expect(crew.map((c) => c.name)).toEqual(expected.map((m) => m.name))
+    expect(crew.map((c) => c.role)).toEqual(expected.map((m) => m.role))
+    expect(crew.map((c) => [c.traitGood, c.traitBad])).toEqual(expected.map((m) => [m.traitGood, m.traitBad]))
+  })
+})
+
+describe('explorePlanet crew finds', () => {
+  it('lands a found member in the roster with the planet+system origin and never joins twice (known seed)', async () => {
+    // Hand-built save with a known seed so the crew roll is recomputable offline.
+    const { db } = await freshFile()
+    const [save] = await db.db.insert(schema.saves).values({ seed: '42', turn: 0, createdAt: new Date().toISOString() }).returning()
+    const [sys] = await db.db
+      .insert(schema.solarSystems)
+      .values({ saveId: save.id, name: 'Test System', x: 50, y: 50, discovered: true, isCurrent: true })
+      .returning({ id: schema.solarSystems.id })
+
+    // Find a small planet id whose exploration roll finds crew (deterministic — recomputed here,
+    // mirroring save.ts: the item haul draws first, then the crew roll on the same stream).
+    let crewPlanetId = -1
+    for (let id = 1; id <= 50 && crewPlanetId === -1; id++) {
+      const rng = explorationRng('42', id)
+      rollExploration(rng)
+      if (rollCrewMember(rng, new Set<string>())) crewPlanetId = id
+    }
+    expect(crewPlanetId).toBeGreaterThan(0)
+
+    const planetName = `P${crewPlanetId}`
+    for (let i = 1; i <= crewPlanetId; i++) {
+      await db.db.insert(schema.planets).values({ systemId: sys.id, parentId: null, name: `P${i}`, type: 'ROCKY', hazard: false })
+    }
+
+    const before = (await getCrewState(db)).crew // empty — this save was hand-built, no starting crew seeded
+    const result = await explorePlanet(db, crewPlanetId)
+
+    expect(result.crewFound).not.toBeNull()
+    const expectedRng = explorationRng('42', crewPlanetId)
+    rollExploration(expectedRng) // consume the item haul draws first, exactly as save.ts does
+    const expectedMember = rollCrewMember(expectedRng, new Set<string>())! // same save+planet → same member
+    expect(result.crewFound!.name).toBe(expectedMember.name)
+    expect(result.crewFound!.role).toBe(expectedMember.role)
+    expect([result.crewFound!.traitGood, result.crewFound!.traitBad]).toEqual([expectedMember.traitGood, expectedMember.traitBad])
+    expect(result.crewFound!.origin).toBe(`${planetName}, Test System`)
+
+    const after = (await getCrewState(db)).crew
+    expect(after.length).toBe(before.length + 1) // exactly one join
+    expect(after.find((c) => c.id === result.crewFound!.id)).toMatchObject({ name: expectedMember.name, origin: `${planetName}, Test System` })
+
+    // The body is already explored → a second scan is rejected and no duplicate joins.
+    await expect(explorePlanet(db, crewPlanetId)).rejects.toMatchObject({ status: 409 })
+    expect((await getCrewState(db)).crew.length).toBe(before.length + 1)
+  })
+})
+
+// --- A/B: resolvers vs the legacy immediate actions (Task 4a) -------------------------
+//
+// Each test builds the identical deterministic fixture (buildWorldFixture — the shared
+// fixture suite in ./test-fixtures: seed '42', stamped save → no backfill; ids line up
+// across worlds) in two fresh files and compares their full state:
+// A = the legacy immediate action (validates, costs a turn, applies the effect);
+// B = the queued shape — the tick has advanced the turn (Task 4b) and the resolver
+// applies the effect (ship/research rows deduct the cost up front, as queueTask did at
+// queue time — Task 3). snapshot() normalizes every game table (wall-clock columns
+// excluded), so the two end states must be byte-identical.
+
+// The resolvers only read `type` + `payload` — tests mint stand-in rows with zeroed
+// identity fields, the same way the public functions' delegation does.
+const task = (type: 'JUMP' | 'EXPLORE', payload: object): Task =>
+  ({ id: 0, saveId: 0, type, payload: JSON.stringify(payload), leadCrewId: 0, helpers: [], duration: 0, remaining: 0, status: 'ACTIVE', queuedAtTurn: 0 })
+
+async function snapshot(db: GameDb): Promise<string> {
+  const [saves, systems, routes, planets, inventory, crew, ship, tech, missions, events] = await Promise.all([
+    db.db.select({ id: schema.saves.id, seed: schema.saves.seed, turn: schema.saves.turn, schemaVersion: schema.saves.schemaVersion }).from(schema.saves),
+    db.db.select().from(schema.solarSystems),
+    db.db.select().from(schema.jumpRoutes),
+    db.db.select().from(schema.planets),
+    db.db.select().from(schema.inventoryItems),
+    db.db.select().from(schema.crew),
+    db.db.select().from(schema.shipSystems),
+    db.db.select().from(schema.tech),
+    db.db.select().from(schema.missions),
+    db.db.select({ id: schema.events.id, turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events),
+  ])
+  return JSON.stringify({ saves, systems, routes, planets, inventory, crew, ship, tech, missions, events })
+}
+
+describe('resolveJumpTask (A/B against jumpToSystem)', () => {
+  it('undiscovered target: lands exactly what jumpToSystem lands — move, discover, ring, event', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    const fa = await buildWorldFixture(a)
+    const fb = await buildWorldFixture(b)
+
+    await jumpToSystem(a, fa.sys1) // legacy: validates, +1 turn, effect, event at turn 1
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1)) // the tick's job (Task 4b)
+    await resolveJumpTask(b, task('JUMP', { systemId: fb.sys1, hops: 1 }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+  })
+
+  it('discovered target: no ring — still byte-identical to jumpToSystem', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    const fa = await buildWorldFixture(a, true)
+    const fb = await buildWorldFixture(b, true)
+
+    await jumpToSystem(a, fa.sys1)
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+    await resolveJumpTask(b, task('JUMP', { systemId: fb.sys1, hops: 1 }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+    expect(await b.db.select().from(schema.solarSystems)).toHaveLength(3) // the fixture's three systems, no ring added
+  })
+
+  it('guards: 404 unknown system, 409 already-current', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    await db.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+
+    await expect(resolveJumpTask(db, task('JUMP', { systemId: 999, hops: 1 }))).rejects.toMatchObject({ status: 404, message: 'Unknown system 999' })
+    await db.db.update(schema.solarSystems).set({ isCurrent: false }).where(eq(schema.solarSystems.id, 1))
+    await db.db.update(schema.solarSystems).set({ isCurrent: true }).where(eq(schema.solarSystems.id, f.sys1))
+    await expect(resolveJumpTask(db, task('JUMP', { systemId: f.sys1, hops: 1 }))).rejects.toMatchObject({ status: 409, message: 'Already at this system' })
+  })
+})
+
+describe('resolveExploreTask (A/B against explorePlanet)', () => {
+  it('planet in the current system: lands exactly what explorePlanet lands — haul, explored, event', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    const fa = await buildWorldFixture(a)
+    const fb = await buildWorldFixture(b)
+
+    await explorePlanet(a, fa.p0)
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+    await resolveExploreTask(b, task('EXPLORE', { planetId: fb.p0 }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+  })
+
+  it('payload planet wins over the current system — the ship stays put (elsewhere semantics)', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    const fa = await buildWorldFixture(a)
+    const fb = await buildWorldFixture(b)
+
+    await explorePlanet(a, fa.p1) // the current function already scans any planet, not just the current system's
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+    await resolveExploreTask(b, task('EXPLORE', { planetId: fb.p1 }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+
+    const sysB = await b.db.select().from(schema.solarSystems)
+    expect(sysB.filter((s) => s.isCurrent).map((s) => s.name)).toEqual(['Origin']) // the ship never moved
+    expect(sysB.find((s) => s.name === 'Outpost')!.discovered).toBe(false) // a scan never discovers a system
+
+    const ev = (await b.db.select({ turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events)).find((e) => e.type === 'explore')!
+    expect(ev.turn).toBe(1)
+    // Exact existing format, recomputed the way save.ts computes it: haul first, crew roll on the same stream.
+    const rng = explorationRng('42', fb.p1)
+    const haul = rollExploration(rng)
+    const member = rollCrewMember(rng, new Set<string>())
+    const foundText = haul.length > 0 ? haul.map((i) => `${i.qty}× ${i.name}`).join(', ') : 'nothing'
+    expect(ev.message).toBe(`Explored Basalt — found ${foundText}${member ? ` — ${member.name} joined the crew` : ''}`)
+  })
+
+  it('guards: 404 unknown planet, 409 already explored (double-resolution safe)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    await db.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+
+    await expect(resolveExploreTask(db, task('EXPLORE', { planetId: 999 }))).rejects.toMatchObject({ status: 404, message: 'Unknown planet 999' })
+    await resolveExploreTask(db, task('EXPLORE', { planetId: f.p1 }))
+    await expect(resolveExploreTask(db, task('EXPLORE', { planetId: f.p1 }))).rejects.toMatchObject({ status: 409, message: 'Basalt was already explored' })
+  })
+})
+
+// --- runTurn: the DB-side tick (POST /api/turn — Task 5 wires the route) -----------------
+//
+// The route→save pattern: ensureSave first, unscoped single-player reads, persist last.
+// The tick (tickTurn) owns the turn increment and the queue math; the 4a resolvers own the
+// effects and the mission hooks (their contract — invoked here, at the tick's new turn,
+// before the final persist); this function owns the table writes.
+describe('runTurn (tick on the DB)', () => {
+  // buildWorldFixture (the shared suite in ./test-fixtures) seeds the save + Origin /
+  // Outpost / Farpoint + Alder / Basalt + the route chain — but no crew or tasks; the tick
+  // needs both, so each test here mints its own rows via addCrew / insertTaskRow.
+  it('free skip: an empty queue costs exactly one turn and touches nothing else (Review Focus 4)', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    const count = (t: typeof schema.solarSystems | typeof schema.planets | typeof schema.inventoryItems | typeof schema.missions | typeof schema.events | typeof schema.tasks) => db.db.select().from(t).then((rows) => rows.length)
+    const before = {
+      systems: await count(schema.solarSystems),
+      planets: await count(schema.planets),
+      inventory: await count(schema.inventoryItems),
+      missions: await count(schema.missions),
+      events: await count(schema.events),
+    }
+
+    const r = await runTurn(db)
+    expect(r.turn).toBe(1)
+    expect(r.tasks).toEqual([])
+    expect(r.completed).toEqual([])
+
+    const [save] = await db.db.select().from(schema.saves).limit(1)
+    expect(save.turn).toBe(1) // the tick is the increment — the only write of the call
+    expect(await count(schema.solarSystems)).toBe(before.systems)
+    expect(await count(schema.planets)).toBe(before.planets)
+    expect(await count(schema.inventoryItems)).toBe(before.inventory)
+    expect(await count(schema.missions)).toBe(before.missions) // no top-up without a resolution
+    expect(await count(schema.events)).toBe(before.events) // no event for a skip
+    expect(await count(schema.tasks)).toBe(0)
+  })
+
+  it('a resolved JUMP completes the matching DELIVER mission, grants the reward, and tops the board up — the 4a hooks, at the tick\'s new turn', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db) // s0 current; s1 'Outpost' undiscovered
+    const [c1] = await addCrew(db, 1)
+    const jumpId = await insertTaskRow(db, { type: 'JUMP', payload: { systemId: f.sys1, hops: 1 }, leadCrewId: c1, helpers: [], duration: 2, remaining: 1, status: 'ACTIVE', queuedAtTurn: 4 })
+    const [save] = await db.db.select().from(schema.saves).limit(1)
+    await db.db.update(schema.saves).set({ turn: 5 }).where(eq(schema.saves.id, save.id))
+    const [mission] = await db.db.insert(schema.missions).values({ saveId: save.id, type: 'DELIVER', description: 'Jump to Outpost', targetSystemId: f.sys1, progressTarget: 1, rewardKind: 'resource', rewardQty: 2, state: 'ACTIVE' }).returning({ id: schema.missions.id })
+
+    const r = await runTurn(db)
+    expect(r.turn).toBe(6)
+    expect(r.completed.map((t) => t.id)).toEqual([jumpId])
+    expect((await db.db.select().from(schema.tasks)).find((t) => t.id === jumpId)!.status).toBe('DONE')
+
+    // the mission resolved at the new turn: DONE + reward in the hold + both events at turn 6
+    expect((await db.db.select().from(schema.missions)).find((m) => m.id === mission.id)).toMatchObject({ state: 'DONE', progress: 1 })
+    expect(await db.db.select().from(schema.inventoryItems)).toEqual([{ id: expect.any(Number), saveId: save.id, kind: 'resource', name: 'MISSION REWARD', qty: 2 }])
+    const events = (await db.db.select().from(schema.events)).map((e) => [e.turn, e.type] as const)
+    expect(events).toHaveLength(2)
+    expect(events).toContainEqual([6, 'jump'])
+    expect(events).toContainEqual([6, 'mission'])
+
+    // the board is topped up after the arrival (the 4a jump-resolver hook) to exactly the floor
+    const available = (await db.db.select({ state: schema.missions.state }).from(schema.missions)).filter((m) => m.state === 'AVAILABLE').length
+    expect(available).toBe(MIN_AVAILABLE)
+
+    // the effect half: the ship is at the payload system
+    expect((await db.db.select().from(schema.solarSystems)).find((s) => s.id === f.sys1)!.isCurrent).toBe(true)
+  })
+
+  it('a JUMP and an EXPLORE both resolving on one tick: the explore effect lands on its payload planet, not the newly arrived system (Review Focus 3)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db) // p0 'Alder' in s0 (Origin); p1 'Basalt' in s1 (Outpost)
+    const [c1, c2] = await addCrew(db, 2)
+    await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p0 }, leadCrewId: c1, helpers: [], duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    await insertTaskRow(db, { type: 'JUMP', payload: { systemId: f.sys1, hops: 1 }, leadCrewId: c2, helpers: [], duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    const [save] = await db.db.select().from(schema.saves).limit(1)
+    await db.db.update(schema.saves).set({ turn: 4 }).where(eq(schema.saves.id, save.id))
+
+    const r = await runTurn(db)
+    expect(r.completed.map((t) => t.type)).toEqual(['EXPLORE', 'JUMP']) // both this tick — the resolvers are payload-targeted (4a), so resolution order cannot change what lands
+
+    const planets = await db.db.select().from(schema.planets)
+    expect(planets.find((p) => p.id === f.p0)!.explored).toBe(true) // the payload planet — in the OLD system
+    expect(planets.find((p) => p.id === f.p1)!.explored).toBe(false) // nothing in the new system
+    expect((await db.db.select().from(schema.solarSystems)).find((s) => s.id === f.sys1)!.isCurrent).toBe(true) // the jump still landed
+    // the haul is the payload planet's deterministic stream (seed '42', p0) — never the new system's
+    expect((await db.db.select().from(schema.inventoryItems)).map((i) => ({ kind: i.kind, name: i.name, qty: i.qty }))).toEqual(rollExploration(explorationRng('42', f.p0)))
+    // the ~18% crew roll rides the same stream — at most one member joins (PR C pins the stream)
+    expect((await db.db.select().from(schema.crew)).length).toBeGreaterThanOrEqual(2)
+  })
+
+  it('a resolver guard failure fails just that task — the turn still lands, the sibling still resolves, no event for the failure', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    const badJumpId = await insertTaskRow(db, { type: 'JUMP', payload: { systemId: 999, hops: 1 }, leadCrewId: c1, helpers: [], duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    const exploreId = await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p0 }, leadCrewId: c2, helpers: [], duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    const [save] = await db.db.select().from(schema.saves).limit(1)
+    await db.db.update(schema.saves).set({ turn: 4 }).where(eq(schema.saves.id, save.id))
+
+    const r = await runTurn(db) // must not throw — the 4a guard throw is a failure signal, not an error
+    expect(r.turn).toBe(5)
+    expect(r.completed.map((t) => t.id)).toEqual([badJumpId, exploreId]) // both reported; only the sibling's effect lands
+    expect((await db.db.select().from(schema.tasks)).find((t) => t.id === badJumpId)!.status).toBe('DONE') // failed task: done — the turn is spent, the crew freed
+    expect((await db.db.select().from(schema.planets)).find((p) => p.id === f.p0)!.explored).toBe(true) // the sibling resolved
+    const types = (await db.db.select().from(schema.events)).map((e) => e.type)
+    expect(types.filter((t) => t === 'jump')).toHaveLength(0) // the 404 guard threw before the jump effect/event
+    expect(types.filter((t) => t === 'explore')).toHaveLength(1)
+    expect((await db.db.select().from(schema.solarSystems)).filter((s) => s.isCurrent).map((s) => s.id)).toEqual([1]) // the ship did not move
+  })
+})
+
+// --- The GET snapshots' task queue (Task 6) ---------------------------------------------
+//
+// Every GET snapshot (world / system / crew) carries the active + pending queue: ACTIVE rows
+// first, then PENDING, each block ordered by (queuedAtTurn, id); DONE rows never appear. A
+// pure read — `remaining` is the stored value, never recomputed; crew names resolve from the
+// roster by id.
+describe('snapshot task queue (world / system / crew)', () => {
+  // buildWorldFixture (4a): a save (seed '42') + Origin (s0, current) / Outpost (s1) +
+  // Alder (p0) / Basalt (p1) + the route pair — no crew, no tasks; this block adds its own.
+
+  // insertTaskRow JSON-encodes its arguments, so the corruption tests seed raw strings straight
+  // into the tasks table (same row shape, no encoding) to reach states the encoder can't.
+  async function insertRawTaskRow(
+    db: GameDb,
+    over: { type: string; payload: string; helpers: string; leadCrewId: number; duration: number; remaining: number; status: string; queuedAtTurn: number },
+  ): Promise<number> {
+    const [save] = await db.db.select().from(schema.saves).limit(1)
+    const [row] = await db.db
+      .insert(schema.tasks)
+      .values({ saveId: save.id, ...over })
+      .returning({ id: schema.tasks.id })
+    return row.id
+  }
+
+  it('empty queue → every GET snapshot carries tasks: []', async () => {
+    const { db } = await freshFile()
+    await buildWorldFixture(db)
+    expect((await getWorldState(db)).tasks).toEqual([])
+    expect((await getSystemState(db)).tasks).toEqual([])
+    const crew = await getCrewState(db)
+    expect(crew.tasks).toEqual([])
+    expect(crew.crew).toEqual([]) // the new wrapper: the roster moves under .crew (JC-7)
+  })
+
+  it('one ACTIVE + one PENDING row → exactly those two, ACTIVE first, in all three snapshots', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2, c3] = await addCrew(db, 3)
+    const jumpId = await insertTaskRow(db, { type: 'JUMP', payload: { systemId: f.sys1, hops: 1 }, leadCrewId: c1, helpers: [], duration: 2, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    const exploreId = await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p1 }, leadCrewId: c2, helpers: [c3], duration: 4, remaining: 4, status: 'PENDING', queuedAtTurn: 3 })
+    const expected = [
+      { id: jumpId, type: 'JUMP', targetLabel: 'Outpost', leadName: 'CREW 1', helperNames: [], remaining: 1, status: 'ACTIVE', leadCrewId: c1, helperCrewIds: [] },
+      { id: exploreId, type: 'EXPLORE', targetLabel: 'Basalt', leadName: 'CREW 2', helperNames: ['CREW 3'], remaining: 4, status: 'PENDING', leadCrewId: c2, helperCrewIds: [c3] },
+    ]
+    expect((await getWorldState(db)).tasks).toEqual(expected)
+    expect((await getSystemState(db)).tasks).toEqual(expected)
+    expect((await getCrewState(db)).tasks).toEqual(expected)
+  })
+
+  it('DONE rows never appear — even when they sort first by (queuedAtTurn, id)', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    await insertTaskRow(db, { type: 'JUMP', payload: { systemId: f.sys1, hops: 1 }, leadCrewId: c1, helpers: [], duration: 1, remaining: 0, status: 'DONE', queuedAtTurn: 1 }) // oldest, lowest id in the queue
+    await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p0 }, leadCrewId: c1, helpers: [], duration: 4, remaining: 4, status: 'PENDING', queuedAtTurn: 2 })
+    const snap = await getWorldState(db)
+    expect(snap.tasks).toHaveLength(1)
+    expect(snap.tasks[0].type).toBe('EXPLORE') // the DONE row is filtered out, not reordered to the back
+  })
+
+  it('a corrupted payload degrades to targetLabel `unknown` — the snapshot still builds', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1, c2] = await addCrew(db, 2)
+    const badId = await insertRawTaskRow(db, { type: 'EXPLORE', payload: 'not-json', helpers: '[]', leadCrewId: c1, duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 2 })
+    const exploreId = await insertTaskRow(db, { type: 'EXPLORE', payload: { planetId: f.p0 }, leadCrewId: c2, helpers: [], duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    const snap = await getWorldState(db) // must not throw out of the read
+    expect(snap.tasks).toEqual([
+      { id: badId, type: 'EXPLORE', targetLabel: 'unknown', leadName: 'CREW 1', helperNames: [], remaining: 1, status: 'ACTIVE', leadCrewId: c1, helperCrewIds: [] },
+      { id: exploreId, type: 'EXPLORE', targetLabel: 'Alder', leadName: 'CREW 2', helperNames: [], remaining: 1, status: 'ACTIVE', leadCrewId: c2, helperCrewIds: [] }, // the well-formed sibling still resolves
+    ])
+  })
+
+  it('a corrupted helpers blob degrades to helperNames [] — no throw', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const badId = await insertRawTaskRow(db, { type: 'JUMP', payload: JSON.stringify({ systemId: f.sys1, hops: 1 }), helpers: '[not-json', leadCrewId: c1, duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    const snap = await getWorldState(db)
+    expect(snap.tasks).toEqual([
+      { id: badId, type: 'JUMP', targetLabel: 'Outpost', leadName: 'CREW 1', helperNames: [], remaining: 1, status: 'ACTIVE', leadCrewId: c1, helperCrewIds: [] },
+    ])
+  })
+
+  it('a corrupted type string degrades to targetLabel `unknown` — no throw', async () => {
+    const { db } = await freshFile()
+    const f = await buildWorldFixture(db)
+    const [c1] = await addCrew(db, 1)
+    const badId = await insertRawTaskRow(db, { type: 'TELEPORT', payload: JSON.stringify({ systemId: f.sys1, hops: 1 }), helpers: '[]', leadCrewId: c1, duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 3 })
+    const snap = await getWorldState(db)
+    expect(snap.tasks).toEqual([
+      { id: badId, type: 'TELEPORT', targetLabel: 'unknown', leadName: 'CREW 1', helperNames: [], remaining: 1, status: 'ACTIVE', leadCrewId: c1, helperCrewIds: [] },
+    ])
+  })
+})
+
+describe('backfill (old saves)', () => {
+  // Planets/moons of one system in insertion order, nested by parent — ids are excluded so a
+  // regenerated set compares equal to the original even though autoincrement moved on.
+  function bodyShape(rows: { id: number; name: string; type: string; hazard: boolean; parentId: number | null }[]) {
+    return rows
+      .filter((r) => r.parentId === null)
+      .map((p) => ({ name: p.name, type: p.type, hazard: p.hazard, moons: rows.filter((m) => m.parentId === p.id).map((m) => [m.name, m.type, m.hazard]) }))
+  }
+
+  it('upgrades a v1 save (no bodies, no crew) in place — deterministic and idempotent', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db) // new game: everything seeded at the current version
+
+    const systems = await db.db.select().from(schema.solarSystems)
+    const rowsFor = (systemId: number) => db.db.select().from(schema.planets).where(eq(schema.planets.systemId, systemId))
+    const beforeBodies: Record<number, unknown> = {}
+    for (const s of systems) {
+      const rows = await rowsFor(s.id)
+      beforeBodies[s.id] = bodyShape(rows.sort((a, b) => a.id - b.id))
+    }
+    const crewOf = (rows: { id: number; name: string; role: string; traitGood: string; traitBad: string; origin: string }[]) =>
+      rows.map((c) => ({ name: c.name, role: c.role, traitGood: c.traitGood, traitBad: c.traitBad, origin: c.origin })) // ids excluded — re-seed moves autoincrement on
+    const beforeCrew = crewOf(await db.db.select().from(schema.crew))
+    const shipOf = (rows: { id: number; type: string; level: number; capacity: number }[]) =>
+      rows.map((s) => ({ type: s.type, level: s.level, capacity: s.capacity })).sort((a, b) => a.type.localeCompare(b.type)) // ids excluded — re-seed moves autoincrement on
+    const beforeShip = shipOf(await db.db.select().from(schema.shipSystems))
+    const techShape = (rows: { id: number; slug: string; name: string; costKind: string; costQty: number; prerequisites: string; effect: string; researched: boolean }[]) =>
+      rows.map((t) => ({ slug: t.slug, name: t.name, costKind: t.costKind, costQty: t.costQty, prerequisites: t.prerequisites, effect: t.effect, researched: t.researched })).sort((a, b) => a.slug.localeCompare(b.slug))
+    const beforeTech = techShape(await db.db.select().from(schema.tech))
+
+    // Simulate a save created by pre-v0.5 code: no bodies, no crew, no ship, no tech, no version stamp (NULL).
+    await db.db.delete(schema.planets)
+    await db.db.delete(schema.crew)
+    await db.db.delete(schema.shipSystems)
+    await db.db.delete(schema.tech)
+    await db.db.update(schema.saves).set({ schemaVersion: null })
+
+    const world = await getWorldState(db) // ensureSave → backfill runs
+    expect(world.systems).toHaveLength(7)
+
+    for (const s of systems) {
+      const rows = await rowsFor(s.id)
+      expect(bodyShape(rows.sort((a, b) => a.id - b.id))).toEqual(beforeBodies[s.id]) // identical to fresh generation
+    }
+    expect(crewOf(await db.db.select().from(schema.crew))).toEqual(beforeCrew)
+    expect(shipOf(await db.db.select().from(schema.shipSystems))).toEqual(beforeShip)
+    expect(techShape(await db.db.select().from(schema.tech))).toEqual(beforeTech)
+
+    const [save] = await db.db.select().from(schema.saves)
+    expect(save.schemaVersion).toBe(SCHEMA_VERSION)
+
+    // Idempotent: a second pass changes nothing.
+    const planetCount = (await db.db.select().from(schema.planets)).length
+    await getWorldState(db)
+    expect((await db.db.select().from(schema.planets)).length).toBe(planetCount)
+    expect((await db.db.select().from(schema.crew)).length).toBe(beforeCrew.length)
+    expect(shipOf(await db.db.select().from(schema.shipSystems))).toEqual(beforeShip)
+    expect(techShape(await db.db.select().from(schema.tech))).toEqual(beforeTech)
+    for (const s of systems) {
+      const rows = await rowsFor(s.id)
+      expect(bodyShape(rows.sort((a, b) => a.id - b.id))).toEqual(beforeBodies[s.id])
+    }
+  })
+
+  it('leaves an up-to-date save untouched', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db)
+    const planetCount = (await db.db.select().from(schema.planets)).length
+    const [save] = await db.db.select().from(schema.saves)
+    expect(save.schemaVersion).toBe(SCHEMA_VERSION)
+
+    await getWorldState(db) // second read: no backfill work to do
+    expect((await db.db.select().from(schema.planets)).length).toBe(planetCount)
+  })
+
+  it('v7: a v6-stamped save gets an empty tasks table without touching state; idempotent across restart', async () => {
+    const { db, file } = await freshFile()
+    const world = await getWorldState(db) // fresh game, stamped at the current version
+    const crewBefore = await db.db.select().from(schema.crew)
+    const invBefore = await db.db.select().from(schema.inventoryItems)
+
+    await db.db.update(schema.saves).set({ schemaVersion: 6 }) // simulate a save stamped by v0.9.12
+    const world2 = await getWorldState(db) // ensureSave → backfill v6 → v7
+
+    expect(world2).toEqual(world) // turn, systems, edges — untouched (Review Focus 1)
+    expect((await db.db.select().from(schema.saves))[0].schemaVersion).toBe(7)
+    expect(await db.db.select().from(schema.crew)).toEqual(crewBefore)
+    expect(await db.db.select().from(schema.inventoryItems)).toEqual(invBefore)
+    const tables = db.raw.exec("SELECT name FROM sqlite_master WHERE type = 'table'")
+    expect(tables[0].values.map((v) => v[0])).toContain('tasks')
+    expect(Number(db.raw.exec('SELECT COUNT(*) FROM tasks')[0]?.values[0][0] ?? 0)).toBe(0) // empty queue after upgrade
+
+    const reopened = await openGameDb(file) // restart: the backfill must be a no-op
+    await getWorldState(reopened)
+    expect((await reopened.db.select().from(schema.saves))[0].schemaVersion).toBe(7)
+    expect(Number(reopened.raw.exec('SELECT COUNT(*) FROM tasks')[0]?.values[0][0] ?? 0)).toBe(0)
+  })
+
+  it('seeds the starting ship on a new game: core types built at base values, WEAPONS unbuilt', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db)
+    const rows = (await db.db.select().from(schema.shipSystems)).sort((a, b) => a.type.localeCompare(b.type))
+    expect(rows).toHaveLength(SHIP_TYPES.length)
+    for (const def of SHIP_TYPES) {
+      const row = rows.find((r) => r.type === def.type)!
+      if (def.builtAtStart) {
+        expect({ level: row.level, capacity: row.capacity }).toEqual({ level: BASE_LEVEL, capacity: BASE_CAPACITY })
+      } else {
+        expect(row.level).toBe(0) // unbuilt until a BUILD action
+        expect(row.capacity).toBe(0)
+      }
+    }
+  })
+
+  it('seeds the tech tree on a new game: one row per known tech, none researched', async () => {
+    const { db } = await freshFile()
+    await getWorldState(db)
+    const rows = (await db.db.select().from(schema.tech)).sort((a, b) => a.slug.localeCompare(b.slug))
+    expect(rows).toHaveLength(TECHS.length)
+    for (const def of TECHS) {
+      const row = rows.find((r) => r.slug === def.slug)!
+      expect({ name: row.name, costKind: row.costKind, costQty: row.costQty, prerequisites: row.prerequisites, effect: row.effect }).toEqual({
+        name: def.name,
+        costKind: def.costKind,
+        costQty: def.costQty,
+        prerequisites: def.prereqs.join(','),
+        effect: def.effect,
+      })
+      expect(row.researched).toBe(false) // nothing is researched at the start
+    }
+  })
+})

lib/game/save.ts

@@ -1,8 +1,15 @@
-import { eq } from 'drizzle-orm'
+import { eq, inArray } from 'drizzle-orm'
 import type { GameDb } from '@/lib/db/client'
 import { persist } from '@/lib/db/client'
 import * as schema from '@/lib/db/schema'
-import { bodyRng, explorationRng, generatePlanets, generateRing, generateStartRegion, mulberry32, rollExploration, type FoundItem } from './world'
+import { generateStartingCrew, rollCrewMember, startingCrewRng, type CrewMember } from './crew'
+import { BASE_CAPACITY, BASE_LEVEL, SHIP_TYPES } from './ship-costs'
+import { checkMissionCompletion, topUpMissionBoard } from './missions'
+import { resolveResearchTask, ResearchError } from './research'
+import { resolveShipBuildTask, resolveShipExpandTask, resolveShipUpgradeTask, ShipError } from './ship'
+import { tickTurn, type QueueState, type Task, type TaskStatus, type TickResult, type TaskType } from './tasks'
+import { TECHS } from './tech'
+import { bodyRng, explorationRng, generatePlanets, generateRing, generateStartRegion, mulberry32, reachableWithin, rollExploration, type FoundItem } from './world'
 
 // Save lifecycle: auto-init on first hit, world state reads, and the jump action.
 // Single-player by design — exactly one save row ever exists, so every query below is
@@ -17,10 +24,29 @@ export interface WorldSystemDto {
   current: boolean
 }
 
+// One row of the snapshot task queue — what the GET builders expose of the tasks table
+// (distinct from the tick's TickResult, which reports every row including DONE): the display
+// fields the UI needs, names resolved, no raw payload — plus the raw row state (JC-11):
+// `status` (the array's ACTIVE-block-first order isn't readable back from it) and the crew
+// ids, which the team builder needs for exact member↔row matching (name matching breaks on
+// the `unknown` fallback).
+export interface QueueDto {
+  id: number
+  type: TaskType
+  targetLabel: string
+  leadName: string
+  helperNames: string[]
+  remaining: number
+  status: TaskStatus // ACTIVE block first in the array, then PENDING
+  leadCrewId: number // crew.id of the team lead
+  helperCrewIds: number[] // crew.id of the supporting crew (degrades to [] on a corrupted blob, like helperNames)
+}
+
 export interface WorldState {
   systems: WorldSystemDto[]
   edges: [number, number][] // undirected system-id pairs, deduped + sorted for stable output
   turn: number
+  tasks: QueueDto[] // the active + pending queue — DONE rows never appear
 }
 
 // Carries an HTTP status so route handlers can map failures to responses without re-parsing.
@@ -44,20 +70,36 @@ function expansionRng(seed: string, turn: number): () => number {
   return mulberry32((Number(seed) + turn * 1_000_003) >>> 0)
 }
 
-// Inserts one system together with its generated bodies (planets + moons), so a system is
-// never left without worlds to explore. Bodies derive from (seed, system id) via bodyRng —
-// independent of generation order and every other system.
-async function insertSystemWithBodies(db: GameDb, saveId: number, ws: { name: string; x: number; y: number }, seed: string): Promise<number> {
-  const [row] = await db.db.insert(schema.solarSystems).values({ saveId, name: ws.name, x: ws.x, y: ws.y }).returning({ id: schema.solarSystems.id })
-  for (const body of generatePlanets(bodyRng(seed, row.id))) {
-    const [planet] = await db.db.insert(schema.planets).values({ systemId: row.id, parentId: null, name: body.name, type: body.type, hazard: body.hazard }).returning({ id: schema.planets.id })
+// The bodies of one system (planets + moons), derived from (seed, system id) via bodyRng —
+// independent of generation order and every other system. Shared by new-game creation and the
+// v2 backfill so both produce identical rows for a given save+system.
+async function insertBodiesForSystem(db: GameDb, systemId: number, seed: string): Promise<void> {
+  for (const body of generatePlanets(bodyRng(seed, systemId))) {
+    const [planet] = await db.db.insert(schema.planets).values({ systemId, parentId: null, name: body.name, type: body.type, hazard: body.hazard }).returning({ id: schema.planets.id })
     for (const moon of body.moons) {
-      await db.db.insert(schema.planets).values({ systemId: row.id, parentId: planet.id, name: moon.name, type: moon.type, hazard: moon.hazard })
+      await db.db.insert(schema.planets).values({ systemId, parentId: planet.id, name: moon.name, type: moon.type, hazard: moon.hazard })
     }
   }
+}
+
+// Inserts one system together with its generated bodies, so a system is never left without
+// worlds to explore.
+async function insertSystemWithBodies(db: GameDb, saveId: number, ws: { name: string; x: number; y: number }, seed: string): Promise<number> {
+  const [row] = await db.db.insert(schema.solarSystems).values({ saveId, name: ws.name, x: ws.x, y: ws.y }).returning({ id: schema.solarSystems.id })
+  await insertBodiesForSystem(db, row.id, seed)
   return row.id
 }
 
+// v2 backfill: every system without planets gets its generated bodies. Idempotent — systems
+// that already have rows are skipped, so a second run changes nothing.
+async function ensureBodiesForAllSystems(db: GameDb, saveId: number, seed: string): Promise<void> {
+  const systems = await db.db.select().from(schema.solarSystems)
+  for (const system of systems) {
+    const rows = await db.db.select({ id: schema.planets.id }).from(schema.planets).where(eq(schema.planets.systemId, system.id))
+    if (rows.length === 0) await insertBodiesForSystem(db, system.id, seed)
+  }
+}
+
 async function insertRoutes(db: GameDb, edges: [number, number][], resolve: (index: number) => number): Promise<void> {
   for (const [a, b] of edges) {
     const from = resolve(a)
@@ -67,17 +109,50 @@ async function insertRoutes(db: GameDb, edges: [number, number][], resolve: (ind
   }
 }
 
-// Creates the save + starting region when the DB has none. No-op otherwise — safe to call
-// on every request (single player, one process: check-then-insert cannot race in practice).
+// Seeds the starting crew for a fresh save: 2–3 members derived from the seed alone.
+async function seedStartingCrew(db: GameDb, saveId: number, seed: string): Promise<void> {
+  for (const member of generateStartingCrew(startingCrewRng(seed))) {
+    await db.db.insert(schema.crew).values({ saveId, name: member.name, role: member.role, traitGood: member.traitGood, traitBad: member.traitBad, origin: 'STARTING CREW' })
+  }
+}
+
+// What each schema version added to a save. Saves created by older code lack the data newer
+// versions seed at new-game time, so ensureSave runs these steps in order for anything below
+// current — each step is idempotent (a no-op when its data already exists).
+export const SCHEMA_VERSION = 7 // v1: save + start region only · v2: bodies for every system · v3: starting crew · v4: starting ship · v5: tech tree · v6: mission board · v7: tasks table
+
+// Seeds the starting ship: one row per known type — core types built at base values, the rest
+// unbuilt (level/capacity 0) until a BUILD action.
+async function seedStartingShip(db: GameDb, saveId: number): Promise<void> {
+  for (const def of SHIP_TYPES) {
+    await db.db.insert(schema.shipSystems).values({ saveId, type: def.type, level: def.builtAtStart ? BASE_LEVEL : 0, capacity: def.builtAtStart ? BASE_CAPACITY : 0 })
+  }
+}
+
+// Seeds the tech tree: one row per known tech (definitions from lib/game/tech.ts), none researched.
+async function seedStartingTech(db: GameDb, saveId: number): Promise<void> {
+  for (const def of TECHS) {
+    await db.db.insert(schema.tech).values({ saveId, slug: def.slug, name: def.name, costKind: def.costKind, costQty: def.costQty, prerequisites: def.prereqs.join(','), effect: def.effect })
+  }
+}
+
+// Creates the save + starting region when the DB has none; backfills older saves otherwise.
+// Safe to call on every request (single player, one process: check-then-insert cannot race).
 export async function ensureSave(db: GameDb): Promise<void> {
   const existing = await db.db.select().from(schema.saves).limit(1)
-  if (existing.length > 0) return
+  if (existing.length === 0) {
+    await createNewGame(db)
+    return
+  }
+  await backfillSave(db, existing[0])
+}
 
+async function createNewGame(db: GameDb): Promise<void> {
   const seed = newSeed()
   const region = generateStartRegion(mulberry32(Number(seed)))
   const nowIso = new Date().toISOString()
 
-  const [save] = await db.db.insert(schema.saves).values({ seed, turn: 0, createdAt: nowIso }).returning()
+  const [save] = await db.db.insert(schema.saves).values({ seed, turn: 0, createdAt: nowIso, schemaVersion: SCHEMA_VERSION }).returning()
   // All inserted as undiscovered first; the start is then marked discovered + current.
   const startId = await insertSystemWithBodies(db, save.id, region.start, seed)
   const neighborIds: number[] = []
@@ -86,11 +161,112 @@ export async function ensureSave(db: GameDb): Promise<void> {
 
   const resolve = (index: number) => (index === 0 ? startId : neighborIds[index - 1])
   await insertRoutes(db, region.edges, resolve)
+  await seedStartingCrew(db, save.id, seed)
+  await seedStartingShip(db, save.id)
+  await seedStartingTech(db, save.id)
+  await topUpMissionBoard(db) // only the start system is discovered yet — no DELIVER targets on a fresh game
 
   await db.db.insert(schema.events).values({ saveId: save.id, turn: 0, type: 'new_game', message: `New game — seed ${seed}, starting system ${region.start.name}`, createdAt: nowIso })
   await persist(db)
 }
 
+// Ordered idempotent backfill for a save created by older code. A NULL version means v1.
+async function backfillSave(db: GameDb, save: { id: number; seed: string; schemaVersion: number | null }): Promise<void> {
+  const from = save.schemaVersion ?? 1
+  let version = from
+
+  if (version < 2) {
+    await ensureBodiesForAllSystems(db, save.id, save.seed) // bodies derive from (seed, system id) — identical to fresh generation
+    version = 2
+  }
+  if (version < 3) {
+    if ((await db.db.select().from(schema.crew)).length === 0) await seedStartingCrew(db, save.id, save.seed)
+    version = 3
+  }
+  if (version < 4) {
+    if ((await db.db.select().from(schema.shipSystems)).length === 0) await seedStartingShip(db, save.id)
+    version = 4
+  }
+  if (version < 5) {
+    if ((await db.db.select().from(schema.tech)).length === 0) await seedStartingTech(db, save.id)
+    version = 5
+  }
+  if (version < 6) {
+    await topUpMissionBoard(db) // idempotent — only inserts when fewer than MIN_AVAILABLE AVAILABLE contracts exist
+    version = 6
+  }
+  if (version < 7) {
+    // The tasks table itself is created by the DDL at open (CREATE TABLE IF NOT EXISTS) for
+    // every file — new or old — so an upgraded save simply starts with an empty queue; stamp.
+    version = 7
+  }
+
+  if (from !== SCHEMA_VERSION) {
+    await db.db.update(schema.saves).set({ schemaVersion: version }).where(eq(schema.saves.id, save.id))
+    await persist(db)
+  }
+}
+
+// The snapshot task queue — the GET builders' read of the tasks table (distinct from the
+// tick's TickResult, which reports every row): one select of the tasks table filtered to
+// ACTIVE + PENDING (DONE rows never appear) plus one select each of the name-resolution
+// tables. The ACTIVE block comes first, then the PENDING block, each ordered by
+// (queuedAtTurn, id). Pure read: `remaining` is the stored row value, never recomputed;
+// crew names resolve from the roster by id, `unknown` tolerating a deleted member (the same
+// spirit as 4b's <= 0 check). Private — every caller is a public read that already ran
+// ensureSave.
+async function taskQueue(db: GameDb): Promise<QueueDto[]> {
+  const [taskRows, crew, systems, planets, tech] = await Promise.all([
+    db.db.select().from(schema.tasks).where(inArray(schema.tasks.status, ['ACTIVE', 'PENDING'])),
+    db.db.select().from(schema.crew),
+    db.db.select().from(schema.solarSystems),
+    db.db.select().from(schema.planets),
+    db.db.select().from(schema.tech),
+  ])
+
+  const systemName = new Map(systems.map((s): [number, string] => [s.id, s.name]))
+  const planetName = new Map(planets.map((p): [number, string] => [p.id, p.name]))
+  const techName = new Map(tech.map((t): [number, string] => [t.id, t.name]))
+  const crewName = (id: number) => crew.find((c) => c.id === id)?.name ?? 'unknown'
+
+  // Corrupted-row tolerance: every JSON read goes through a guarded parse — a malformed
+  // payload / helpers / type degrades to `unknown` / [] instead of throwing out of this
+  // pure read (one bad row must not 500 the /api/world, /api/system and /api/crew routes).
+  const parse = <T>(raw: string): T | null => { try { return JSON.parse(raw) as T } catch { return null } }
+  const parseHelpers = (raw: string): number[] => { const v = parse<unknown>(raw); return Array.isArray(v) ? (v as number[]) : [] }
+
+  // targetLabel from the 4a payload shapes, per type (the Task interface in tasks.ts): the
+  // target's display name (the jump destination, the scanned body, the researched tech), the
+  // ship system's name with the verb suffixed for upgrade/expand, and the SHIP_TYPES string
+  // as-is for a build. A deleted lookup target, a malformed payload, or a missing field
+  // falls back to `unknown`.
+  const labelFor: Record<TaskType, (payload: string) => string> = {
+    JUMP: (payload) => { const p = parse<{ systemId: number }>(payload); return p ? (systemName.get(p.systemId) ?? 'unknown') : 'unknown' },
+    EXPLORE: (payload) => { const p = parse<{ planetId: number }>(payload); return p ? (planetName.get(p.planetId) ?? 'unknown') : 'unknown' },
+    SHIP_UPGRADE: (payload) => { const p = parse<{ systemId: number }>(payload); return p ? `${systemName.get(p.systemId) ?? 'unknown'} — upgrade` : 'unknown' },
+    SHIP_EXPAND: (payload) => { const p = parse<{ systemId: number }>(payload); return p ? `${systemName.get(p.systemId) ?? 'unknown'} — expand` : 'unknown' },
+    SHIP_BUILD: (payload) => parse<{ type: string }>(payload)?.type ?? 'unknown',
+    RESEARCH: (payload) => { const p = parse<{ techId: number }>(payload); return p ? (techName.get(p.techId) ?? 'unknown') : 'unknown' },
+  }
+
+  const queue = taskRows.map((t) => ({
+    id: t.id,
+    type: t.type as TaskType,
+    targetLabel: labelFor[t.type as TaskType]?.(t.payload) ?? 'unknown',
+    leadName: crewName(t.leadCrewId),
+    helperNames: parseHelpers(t.helpers).map(crewName),
+    remaining: t.remaining,
+    status: t.status as TaskStatus,
+    leadCrewId: t.leadCrewId,
+    helperCrewIds: parseHelpers(t.helpers),
+    queuedAtTurn: t.queuedAtTurn,
+  }))
+  const byQueueOrder = (rows: typeof queue) => rows.sort((a, b) => a.queuedAtTurn - b.queuedAtTurn || a.id - b.id)
+  const ordered = [...byQueueOrder(queue.filter((t) => t.status === 'ACTIVE')), ...byQueueOrder(queue.filter((t) => t.status === 'PENDING'))]
+  // queuedAtTurn is only for ordering — the exposed shape is exactly QueueDto (status stays: JC-11).
+  return ordered.map(({ queuedAtTurn, ...dto }) => dto)
+}
+
 export async function getWorldState(db: GameDb): Promise<WorldState> {
   await ensureSave(db)
   const [save] = await db.db.select().from(schema.saves).limit(1)
@@ -114,9 +290,62 @@ export async function getWorldState(db: GameDb): Promise<WorldState> {
     systems: systems.map((s) => ({ id: s.id, name: s.name, x: s.x, y: s.y, discovered: s.discovered, current: s.isCurrent })),
     edges,
     turn: save.turn,
+    tasks: await taskQueue(db),
   }
 }
 
+// --- Per-type resolvers (PR A, spec §3) -------------------------------------------
+//
+// The effect bodies of the instant actions, extracted so the turn tick (Task 4b) can
+// resolve a completed task row against whatever the world looks like at resolution time.
+// Contract (all six resolvers across save.ts / ship.ts / research.ts — see the Interfaces
+// block of this plan): effects land on the PAYLOAD target, never on the current location;
+// no turn advance (the caller owns the turn); no cost deduction (queueTask deducted at
+// queue time — Task 3; the immediate public functions deduct before delegating); a minimal
+// guard against a stale or double-resolved target (existing error class + exact message —
+// a throw is the signal for the 4b tick's re-validation); the existing event text formats
+// at the current turn; persist at the end.
+
+// A stand-in task row for the immediate public functions delegating to a resolver: the
+// resolvers only read `type` + `payload`, so the identity fields are zeroed.
+function syntheticTask(type: TaskType, payload: object): Task {
+  return { id: 0, saveId: 0, type, payload: JSON.stringify(payload), leadCrewId: 0, helpers: [], duration: 0, remaining: 0, status: 'ACTIVE', queuedAtTurn: 0 }
+}
+
+// JUMP — move the ship to the payload's system: flip isCurrent, discover the target, and
+// when it was undiscovered grow the chart ring off the same (seed, turn) stream as before.
+export async function resolveJumpTask(db: GameDb, task: Task): Promise<void> {
+  await ensureSave(db)
+  const { systemId } = JSON.parse(task.payload) as { systemId: number }
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const systems = await db.db.select().from(schema.solarSystems)
+
+  const target = systems.find((s) => s.id === systemId)
+  if (!target) throw new JumpError(404, `Unknown system ${systemId}`)
+  if (target.isCurrent) throw new JumpError(409, 'Already at this system')
+  const current = systems.find((s) => s.isCurrent)!
+
+  await db.db.update(schema.solarSystems).set({ isCurrent: false }).where(eq(schema.solarSystems.id, current.id))
+  await db.db.update(schema.solarSystems).set({ isCurrent: true, discovered: true }).where(eq(schema.solarSystems.id, target.id))
+
+  if (!target.discovered) {
+    // Growing the chart: a ring of new (undiscovered) neighbours around the newly reached
+    // system, so there is always somewhere to jump next and a route back.
+    const rng = expansionRng(save.seed, save.turn)
+    const takenNames = new Set(systems.map((s) => s.name))
+    const ring = generateRing(rng, target.x, target.y, takenNames, systems)
+    const ringIds: number[] = []
+    for (const s of ring.systems) ringIds.push(await insertSystemWithBodies(db, save.id, s, save.seed))
+    const resolve = (index: number) => (index === 0 ? target.id : ringIds[index - 1])
+    await insertRoutes(db, ring.edges, resolve)
+  }
+
+  await db.db.insert(schema.events).values({ saveId: save.id, turn: save.turn, type: 'jump', message: `Jumped to ${target.name}`, createdAt: new Date().toISOString() })
+  await checkMissionCompletion(db, save.id, save.turn, { jumpedTo: target.id }) // an ACTIVE DELIVER may have arrived at its destination
+  await topUpMissionBoard(db)
+  await persist(db)
+}
+
 export async function jumpToSystem(db: GameDb, systemId: number): Promise<WorldState> {
   await ensureSave(db)
   const [save] = await db.db.select().from(schema.saves).limit(1)
@@ -128,32 +357,43 @@ export async function jumpToSystem(db: GameDb, systemId: number): Promise<WorldS
   if (current.id === target.id) throw new JumpError(409, 'Already at this system')
 
   const routes = await db.db.select().from(schema.jumpRoutes)
-  const adjacent = routes.some((r) => r.fromSystem === current.id && r.toSystem === target.id)
-  if (!adjacent) throw new JumpError(409, `${target.name} is not reachable from ${current.name}`)
-
-  const turn = save.turn + 1
-  await db.db.update(schema.solarSystems).set({ isCurrent: false }).where(eq(schema.solarSystems.id, current.id))
-  await db.db.update(schema.solarSystems).set({ isCurrent: true, discovered: true }).where(eq(schema.solarSystems.id, target.id))
-
-  if (!target.discovered) {
-    // Growing the chart: a ring of new (undiscovered) neighbours around the newly reached
-    // system, so there is always somewhere to jump next and a route back.
-    const rng = expansionRng(save.seed, turn)
-    const takenNames = new Set(systems.map((s) => s.name))
-    const ring = generateRing(rng, target.x, target.y, takenNames, systems)
-    const ringIds: number[] = []
-    for (const s of ring.systems) ringIds.push(await insertSystemWithBodies(db, save.id, s, save.seed))
-    const resolve = (index: number) => (index === 0 ? target.id : ringIds[index - 1])
-    await insertRoutes(db, ring.edges, resolve)
-  }
+  // #35 — NAVIGATION AI extends the jump range from adjacent (1 hop) to 2 hops; a multi-hop
+  // jump costs one turn per hop, so single-hop jumps keep their existing cost.
+  const navAi = (await db.db.select().from(schema.tech)).some((t) => t.slug === 'NAV_AI' && t.researched)
+  const hopCount = reachableWithin(routes.map((r) => [r.fromSystem, r.toSystem]), current.id, navAi ? 2 : 1).get(target.id)
+  if (hopCount === undefined) throw new JumpError(409, `${target.name} is not reachable from ${current.name}`)
 
+  // The immediate jump keeps its own turn cost (the tick owns turn advances for queued
+  // tasks): advance it before delegating so the resolver's event lands at exactly the
+  // turn the old code wrote.
+  const turn = save.turn + hopCount
   await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
-  await db.db.insert(schema.events).values({ saveId: save.id, turn, type: 'jump', message: `Jumped to ${target.name}`, createdAt: new Date().toISOString() })
-  await persist(db)
+  await resolveJumpTask(db, syntheticTask('JUMP', { systemId, hops: hopCount }))
 
   return getWorldState(db)
 }
 
+// The jump pre-checks, extracted for the queueing route (5a): the same codes and messages
+// as jumpToSystem — unknown system (404), already there (409), outside range (409) — and
+// the hop count (reachableWithin + NAV AI, the existing reachability logic) the route puts
+// in the queued JUMP payload.
+export async function checkJumpTarget(db: GameDb, systemId: number): Promise<number> {
+  await ensureSave(db)
+  const systems = await db.db.select().from(schema.solarSystems)
+
+  const target = systems.find((s) => s.id === systemId)
+  if (!target) throw new JumpError(404, `Unknown system ${systemId}`)
+  const current = systems.find((s) => s.isCurrent)!
+  if (current.id === target.id) throw new JumpError(409, 'Already at this system')
+
+  const routes = await db.db.select().from(schema.jumpRoutes)
+  // #35 — NAVIGATION AI extends the jump range from adjacent (1 hop) to 2 hops.
+  const navAi = (await db.db.select().from(schema.tech)).some((t) => t.slug === 'NAV_AI' && t.researched)
+  const hopCount = reachableWithin(routes.map((r) => [r.fromSystem, r.toSystem]), current.id, navAi ? 2 : 1).get(target.id)
+  if (hopCount === undefined) throw new JumpError(409, `${target.name} is not reachable from ${current.name}`)
+  return hopCount
+}
+
 // --- Local system + exploration ---------------------------------------------
 
 export interface PlanetDto {
@@ -177,6 +417,7 @@ export interface SystemState {
   planets: PlanetDto[] // insertion order = display order (a moon follows its parent row)
   inventory: InventoryItemDto[]
   turn: number
+  tasks: QueueDto[] // the active + pending queue — DONE rows never appear
 }
 
 // Carries an HTTP status so route handlers can map failures to responses without re-parsing.
@@ -202,7 +443,7 @@ async function readSystemState(db: GameDb): Promise<SystemState> {
     parent: p.parentId,
   }))
   const inventory = (await db.db.select().from(schema.inventoryItems)).map((i) => ({ kind: i.kind as 'resource' | 'part', name: i.name, qty: i.qty }))
-  return { systemId: current.id, systemName: current.name, planets, inventory, turn: save.turn }
+  return { systemId: current.id, systemName: current.name, planets, inventory, turn: save.turn, tasks: await taskQueue(db) }
 }
 
 export async function getSystemState(db: GameDb): Promise<SystemState> {
@@ -210,23 +451,54 @@ export async function getSystemState(db: GameDb): Promise<SystemState> {
   return readSystemState(db)
 }
 
-export interface ExploreResult extends SystemState {
-  outcome: FoundItem[] // what this scan found (may be empty — some scans find nothing)
+// --- Crew roster --------------------------------------------------------------
+
+export interface CrewDto {
+  id: number
+  name: string
+  role: string
+  traitGood: string
+  traitBad: string
+  origin: string // 'STARTING CREW' or '<planet>, <system>' for members found while exploring
 }
 
-// Scan one body of the save: deterministic haul from (seed, planet id), marks it explored,
-// costs a turn, accumulates finds into inventory and writes an event. Any existing planet
-// may be scanned (the UI only offers the current system's rows).
-export async function explorePlanet(db: GameDb, planetId: number): Promise<ExploreResult> {
+// GET /api/crew wraps the roster with the snapshot task queue (JC-7): a bare array cannot
+// carry a sibling tasks field, so the endpoint returns this object.
+export interface CrewState {
+  crew: CrewDto[]
+  tasks: QueueDto[]
+}
+
+// The full roster in join order (starting crew first, then finds), wrapped with the queue.
+// Auto-initializes like the other reads.
+export async function getCrewState(db: GameDb): Promise<CrewState> {
   await ensureSave(db)
+  const crew = (await db.db.select().from(schema.crew)).map((c) => ({ id: c.id, name: c.name, role: c.role, traitGood: c.traitGood, traitBad: c.traitBad, origin: c.origin }))
+  return { crew, tasks: await taskQueue(db) }
+}
+
+export interface ExploreResult extends SystemState {
+  outcome: FoundItem[] // what this scan found (may be empty — some scans find nothing)
+  crewFound: CrewDto | null // a member who joined the ship on this scan (null when none)
+}
+
+// EXPLORE — scan the payload's planet (any system — the UI only offered the current
+// system's rows; a queued scan may resolve while the ship is elsewhere): deterministic
+// haul into the inventory, planet marked explored, crew-join roll on the same
+// (seed, planet) stream.
+export async function resolveExploreTask(db: GameDb, task: Task): Promise<{ outcome: FoundItem[]; crewFound: CrewDto | null }> {
+  await ensureSave(db)
+  const { planetId } = JSON.parse(task.payload) as { planetId: number }
   const [save] = await db.db.select().from(schema.saves).limit(1)
   const planets = await db.db.select().from(schema.planets)
   const target = planets.find((p) => p.id === planetId)
   if (!target) throw new ExploreError(404, `Unknown planet ${planetId}`)
   if (target.explored) throw new ExploreError(409, `${target.name} was already explored`)
 
-  const outcome = rollExploration(explorationRng(save.seed, target.id))
-  const turn = save.turn + 1
+  const rng = explorationRng(save.seed, target.id)
+  const outcome = rollExploration(rng) // resource/part haul first…
+  const takenNames = new Set((await db.db.select().from(schema.crew)).map((c) => c.name))
+  const foundMember = rollCrewMember(rng, takenNames) // …then the crew roll on the same stream
 
   await db.db.update(schema.planets).set({ explored: true }).where(eq(schema.planets.id, target.id))
   for (const item of outcome) {
@@ -239,10 +511,164 @@ export async function explorePlanet(db: GameDb, planetId: number): Promise<Explo
     }
   }
 
+  let crewFound: CrewDto | null = null
+  if (foundMember) {
+    const systems = await db.db.select().from(schema.solarSystems)
+    const systemName = systems.find((s) => s.id === target.systemId)?.name ?? 'unknown system'
+    const [row] = await db.db.insert(schema.crew).values({ saveId: save.id, name: foundMember.name, role: foundMember.role, traitGood: foundMember.traitGood, traitBad: foundMember.traitBad, origin: `${target.name}, ${systemName}` }).returning()
+    crewFound = { id: row.id, name: row.name, role: row.role, traitGood: row.traitGood, traitBad: row.traitBad, origin: row.origin }
+  }
+
   const foundText = outcome.length > 0 ? outcome.map((i) => `${i.qty}× ${i.name}`).join(', ') : 'nothing'
-  await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
-  await db.db.insert(schema.events).values({ saveId: save.id, turn, type: 'explore', message: `Explored ${target.name} — found ${foundText}`, createdAt: new Date().toISOString() })
+  const crewText = crewFound ? ` — ${crewFound.name} joined the crew` : ''
+  await db.db.insert(schema.events).values({ saveId: save.id, turn: save.turn, type: 'explore', message: `Explored ${target.name} — found ${foundText}${crewText}`, createdAt: new Date().toISOString() })
+  await checkMissionCompletion(db, save.id, save.turn, { outcome }) // an ACTIVE EXPLORE/FIND may have advanced or completed
+  await topUpMissionBoard(db)
   await persist(db)
 
-  return { ...(await readSystemState(db)), outcome }
+  return { outcome, crewFound }
+}
+
+// Scan one body of the save: deterministic haul from (seed, planet id), marks it explored,
+// costs a turn, accumulates finds into inventory and writes an event. The same per-planet
+// rng stream also rolls for a crew member (~18% of scans) who joins the roster. Any existing
+// planet may be scanned (the UI only offers the current system's rows).
+export async function explorePlanet(db: GameDb, planetId: number): Promise<ExploreResult> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const planets = await db.db.select().from(schema.planets)
+  const target = planets.find((p) => p.id === planetId)
+  if (!target) throw new ExploreError(404, `Unknown planet ${planetId}`)
+  if (target.explored) throw new ExploreError(409, `${target.name} was already explored`)
+
+  // The immediate scan keeps its one-turn cost; the resolver applies everything else at that turn.
+  const turn = save.turn + 1
+  await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
+  const { outcome, crewFound } = await resolveExploreTask(db, syntheticTask('EXPLORE', { planetId }))
+
+  return { ...(await readSystemState(db)), outcome, crewFound }
+}
+
+// The explore pre-checks, extracted for the queueing route (5a): the same codes and messages
+// as explorePlanet — unknown body (404), already scanned (409).
+export async function checkExploreTarget(db: GameDb, planetId: number): Promise<void> {
+  await ensureSave(db)
+  const planets = await db.db.select().from(schema.planets)
+  const target = planets.find((p) => p.id === planetId)
+  if (!target) throw new ExploreError(404, `Unknown planet ${planetId}`)
+  if (target.explored) throw new ExploreError(409, `${target.name} was already explored`)
+}
+
+// --- The turn tick on the DB (POST /api/turn — Task 5 wires the route) ---------------------
+//
+// The route→save pattern: ensureSave first, unscoped single-player reads, persist last.
+// The tick (tickTurn) owns the turn increment and the queue math; the 4a resolvers own the
+// effects and the mission hooks (their contract — invoked here, at the tick's new turn,
+// before the final persist); this function owns the table writes.
+
+// The 4a contract names the resolvers 1:1 exactly for this dispatch; exhaustive by type —
+// a TaskType without a resolver is a compile error.
+const TASK_RESOLVERS: Record<TaskType, (db: GameDb, task: Task) => Promise<unknown>> = {
+  JUMP: resolveJumpTask,
+  EXPLORE: resolveExploreTask,
+  SHIP_UPGRADE: resolveShipUpgradeTask,
+  SHIP_EXPAND: resolveShipExpandTask,
+  SHIP_BUILD: resolveShipBuildTask,
+  RESEARCH: resolveResearchTask,
+}
+
+// Row→domain at the save.ts boundary (the inverse — Task→row at insert — stays with the
+// routes' queueing path).
+function rowToTask(row: { id: number; saveId: number; type: string; payload: string; leadCrewId: number; helpers: string; duration: number; remaining: number; status: string; queuedAtTurn: number }): Task {
+  return { id: row.id, saveId: row.saveId, type: row.type as TaskType, payload: row.payload, leadCrewId: row.leadCrewId, helpers: JSON.parse(row.helpers) as number[], duration: row.duration, remaining: row.remaining, status: row.status as TaskStatus, queuedAtTurn: row.queuedAtTurn }
+}
+
+// The plain queue snapshot Task 3's engine runs over, mapped from the schema's rows: crew,
+// tasks, inventory, shipSystems and tech, all in id order (single save, unscoped). The route
+// never touches lib/db/schema, so the single save row is resolved here, not passed in.
+export async function queueStateFromSave(db: GameDb): Promise<QueueState> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [crew, taskRows, inventory, shipSystems, tech] = await Promise.all([
+    db.db.select().from(schema.crew),
+    db.db.select().from(schema.tasks),
+    db.db.select().from(schema.inventoryItems),
+    db.db.select().from(schema.shipSystems),
+    db.db.select().from(schema.tech),
+  ])
+  return {
+    turn: save.turn,
+    crew: crew.map((c) => ({ id: c.id, name: c.name, role: c.role, traitGood: c.traitGood, traitBad: c.traitBad, origin: c.origin })),
+    tasks: taskRows.map(rowToTask),
+    inventory: inventory.map((i) => ({ kind: i.kind as 'resource' | 'part', name: i.name, qty: i.qty })),
+    shipSystems: shipSystems.map((s) => ({ id: s.id, type: s.type, level: s.level, capacity: s.capacity })),
+    tech: tech.map((t) => ({ id: t.id, slug: t.slug })),
+  }
+}
+
+// The route's DB-boundary insert (the route→save pattern): queueTask's row minus the two
+// values only the DB boundary knows (id autoincrement, saveId = the single save's id).
+// payload is already a JSON string from queueTask (passed through); the crew ids serialize
+// to the JSON column. Persists so the queue survives a crash; returns the new row id.
+export async function saveTaskRow(db: GameDb, task: Omit<Task, 'id' | 'saveId'>): Promise<number> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db
+    .insert(schema.tasks)
+    .values({ saveId: save.id, type: task.type, payload: task.payload, leadCrewId: task.leadCrewId, helpers: JSON.stringify(task.helpers), duration: task.duration, remaining: task.remaining, status: task.status, queuedAtTurn: task.queuedAtTurn })
+    .returning({ id: schema.tasks.id })
+  await persist(db)
+  return row.id
+}
+
+// The route's DB-boundary hold write (the route→save pattern): queueTask's deducted inventory
+// replaces the save's rows — array order = oldest first = id order, so spendItems' oldest-row-
+// first consumption and the id-ordered reads stay consistent after the rewrite. Persists so
+// the deduction survives a crash; the queueing routes call it with queueTask's result.
+export async function saveInventory(db: GameDb, items: InventoryItemDto[]): Promise<void> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  await db.db.delete(schema.inventoryItems).where(eq(schema.inventoryItems.saveId, save.id))
+  for (const item of items) {
+    await db.db.insert(schema.inventoryItems).values({ saveId: save.id, kind: item.kind, name: item.name, qty: item.qty })
+  }
+  await persist(db)
+}
+
+export async function runTurn(db: GameDb): Promise<TickResult> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const state = await queueStateFromSave(db)
+
+  const result = tickTurn(state)
+
+  // (e) the tick IS the turn increment — written BEFORE the resolvers run, so their events
+  // and the checkMissionCompletion / topUpMissionBoard hooks (4a contract) land at the new
+  // turn, exactly where today's actions place them.
+  await db.db.update(schema.saves).set({ turn: result.turn }).where(eq(schema.saves.id, save.id))
+
+  // (b) + (d) resolve in the order tickTurn returned. A resolver throw is its 4a guard
+  // (stale or double-resolved target): the task fails — it is already DONE (the tick freed
+  // the team; the turn is spent), the effect simply does not land, and no event is written
+  // for it. Only the four domain error classes fail a task; anything else rethrows.
+  for (const task of result.completed) {
+    try {
+      await TASK_RESOLVERS[task.type](db, task)
+    } catch (err) {
+      if (err instanceof JumpError || err instanceof ExploreError || err instanceof ShipError || err instanceof ResearchError) continue
+      throw err
+    }
+  }
+
+  // Persist the tick's queue changes (the resolvers already persisted their own effects) —
+  // one final whole-DB write makes the turn atomic on disk.
+  for (const before of state.tasks) {
+    const after = result.tasks.find((t) => t.id === before.id)
+    if (after && (after.status !== before.status || after.remaining !== before.remaining)) {
+      await db.db.update(schema.tasks).set({ status: after.status, remaining: after.remaining }).where(eq(schema.tasks.id, after.id))
+    }
+  }
+  await persist(db)
+
+  return result
 }

lib/game/ship-costs.ts

@@ -0,0 +1,48 @@
+// Pure ship-system model: the known system types, base values and the action cost model.
+// No DB imports — both lib/game/ship.ts (server) and the frontend import from here so the
+// UI's affordability/cap logic can never drift from what the API enforces.
+
+export interface ShipTypeDef {
+  type: string
+  builtAtStart: boolean // part of the starting ship? (otherwise unbuilt until BUILD)
+}
+
+// The known system types — display order. Reuses the placeholder SHIP SYSTEMS tab card names
+// for continuity, plus HULL so the vessel-metrics hull bar can be driven by a real level.
+export const SHIP_TYPES: ShipTypeDef[] = [
+  { type: 'HULL', builtAtStart: true },
+  { type: 'REACTOR', builtAtStart: true },
+  { type: 'LIFE SUPPORT', builtAtStart: true },
+  { type: 'NAV COMPUTER', builtAtStart: true },
+  { type: 'COMMS ARRAY', builtAtStart: true },
+  { type: 'WEAPONS', builtAtStart: false },
+]
+
+export const BASE_LEVEL = 1 // what a system starts at when built (starting ship or BUILD)
+export const BASE_CAPACITY = 2
+export const MAX_LEVEL = 5 // UPGRADE cap
+export const MAX_CAPACITY = 10 // EXPAND cap
+
+// Display-only cap for the VESSEL METRICS crew roster bar (no gameplay effect yet).
+export const CREW_CAPACITY = 6
+
+// Cost model — all costs are in inventory items, consumed from the oldest cargo row of the
+// required kind first (see spendItems in lib/game/ship.ts):
+//   UPGRADE {systemId} — `level` units of any resource (scales with current level)
+//   EXPAND  {systemId} — `capacity` units of any resource (scales with current capacity)
+//   BUILD   {type}     — a flat amount of parts (parts are rarer than resources, so builds
+//                        are the bigger investment)
+export function upgradeCost(level: number): number {
+  return level
+}
+
+export function expandCost(capacity: number): number {
+  return capacity
+}
+
+export const BUILD_PART_COST = 3
+
+// Total qty of one kind across the cargo hold — used for affordability checks.
+export function totalQty(items: { kind: string; qty: number }[], kind: 'resource' | 'part'): number {
+  return items.filter((i) => i.kind === kind).reduce((sum, i) => sum + i.qty, 0)
+}

lib/game/ship.test.ts

@@ -0,0 +1,284 @@
+import { mkdtemp, rm } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+import { afterAll, describe, expect, it } from 'vitest'
+import { eq } from 'drizzle-orm'
+import { openGameDb, type GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { BASE_CAPACITY, BASE_LEVEL, BUILD_PART_COST, MAX_CAPACITY, MAX_LEVEL, SHIP_TYPES } from './ship-costs'
+import { buildSystem, expandSystem, getShipState, resolveShipBuildTask, resolveShipExpandTask, resolveShipUpgradeTask, spendItems, upgradeSystem, type ShipState } from './ship'
+import { SCHEMA_VERSION } from './save'
+import { TECHS } from './tech'
+import type { Task } from './tasks'
+
+const dirs: string[] = []
+
+async function freshFile(): Promise<{ db: GameDb; file: string }> {
+  const dir = await mkdtemp(path.join(tmpdir(), 'sw-ship-test-'))
+  dirs.push(dir)
+  const file = path.join(dir, 'test.db')
+  return { db: await openGameDb(file), file }
+}
+
+afterAll(async () => {
+  for (const d of dirs) await rm(d, { recursive: true, force: true })
+})
+
+async function addItem(db: GameDb, kind: 'resource' | 'part', name: string, qty: number): Promise<void> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  await db.db.insert(schema.inventoryItems).values({ saveId: save.id, kind, name, qty })
+}
+
+const systemOf = (state: ShipState, type: string): ShipState['systems'][number] => state.systems.find((s) => s.type === type)!
+
+describe('getShipState', () => {
+  it('new game: starting ship in display order — core types built at base values, WEAPONS unbuilt', async () => {
+    const { db } = await freshFile()
+    const state = await getShipState(db)
+
+    expect(state.systems.map((s) => s.type)).toEqual(SHIP_TYPES.map((t) => t.type)) // display order follows SHIP_TYPES
+    for (const def of SHIP_TYPES) {
+      const row = systemOf(state, def.type)
+      if (def.builtAtStart) {
+        expect(row.built).toBe(true)
+        expect({ level: row.level, capacity: row.capacity }).toEqual({ level: BASE_LEVEL, capacity: BASE_CAPACITY })
+      } else {
+        expect(row.built).toBe(false) // unbuilt until a BUILD action
+        expect(row.level).toBe(0)
+        expect(row.capacity).toBe(0)
+      }
+    }
+    expect(state.inventory).toEqual([])
+    expect(state.turn).toBe(0)
+  })
+})
+
+describe('upgradeSystem', () => {
+  it('rejects with 422 and mutates nothing when the hold is empty', async () => {
+    const { db } = await freshFile()
+    const before = await getShipState(db)
+    const reactorId = systemOf(before, 'REACTOR').id
+
+    await expect(upgradeSystem(db, reactorId)).rejects.toMatchObject({ status: 422 })
+
+    const after = await getShipState(db)
+    expect(systemOf(after, 'REACTOR').level).toBe(BASE_LEVEL) // no level change…
+    expect(after.turn).toBe(before.turn) // …and no turn spent on a failed action
+  })
+
+  it('rejects unknown systemId with 404 and unbuilt systems with 409', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    await expect(upgradeSystem(db, 999)).rejects.toMatchObject({ status: 404 })
+    const weaponsId = systemOf(await getShipState(db), 'WEAPONS').id
+    await expect(upgradeSystem(db, weaponsId)).rejects.toMatchObject({ status: 409 })
+  })
+
+  it('consumes the cost from the oldest resource row first (deleting rows that hit zero), costs a turn and writes an event', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    await addItem(db, 'resource', 'IRON ORE', 1) // oldest — fully consumed by the cost of 1
+    await addItem(db, 'resource', 'CRYSTAL DUST', 5)
+
+    const reactorId = systemOf(await getShipState(db), 'REACTOR').id
+    const state = await upgradeSystem(db, reactorId) // level 1 → cost 1 resource
+
+    expect(systemOf(state, 'REACTOR').level).toBe(BASE_LEVEL + 1)
+    expect((await db.db.select().from(schema.inventoryItems)).map((i) => [i.name, i.qty])).toEqual([['CRYSTAL DUST', 5]]) // IRON ORE row deleted
+    expect(state.turn).toBe(1)
+
+    const event = (await db.db.select().from(schema.events)).find((e) => e.type === 'upgrade')!
+    expect(event.turn).toBe(1)
+    expect(event.message).toContain('REACTOR')
+  })
+
+  it('caps at MAX_LEVEL with 409', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    const reactorId = systemOf(await getShipState(db), 'REACTOR').id
+    await db.db.update(schema.shipSystems).set({ level: MAX_LEVEL }).where(eq(schema.shipSystems.id, reactorId)) // cost path covered above
+
+    await expect(upgradeSystem(db, reactorId)).rejects.toMatchObject({ status: 409 })
+    expect((await getShipState(db)).turn).toBe(0)
+  })
+})
+
+describe('expandSystem', () => {
+  it('raises capacity by one for `capacity` resources; caps at MAX_CAPACITY with 409', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    await addItem(db, 'resource', 'IRON ORE', BASE_CAPACITY + 1) // cost is the current capacity (2), one left over
+
+    const hullId = systemOf(await getShipState(db), 'HULL').id
+    const state = await expandSystem(db, hullId)
+    expect(systemOf(state, 'HULL').capacity).toBe(BASE_CAPACITY + 1)
+    expect((await db.db.select().from(schema.inventoryItems)).map((i) => [i.name, i.qty])).toEqual([['IRON ORE', 1]])
+
+    const event = (await db.db.select().from(schema.events)).find((e) => e.type === 'expand')!
+    expect(event.turn).toBe(1)
+    expect(event.message).toContain('HULL')
+
+    await db.db.update(schema.shipSystems).set({ capacity: MAX_CAPACITY }).where(eq(schema.shipSystems.id, hullId))
+    await expect(expandSystem(db, hullId)).rejects.toMatchObject({ status: 409 })
+  })
+
+  it('rejects unknown systemId with 404 and unbuilt systems with 409', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+    await expect(expandSystem(db, 999)).rejects.toMatchObject({ status: 404 })
+    const weaponsId = systemOf(await getShipState(db), 'WEAPONS').id
+    await expect(expandSystem(db, weaponsId)).rejects.toMatchObject({ status: 409 })
+  })
+})
+
+describe('buildSystem', () => {
+  it('builds an unbuilt type at base values for a flat parts cost; a second build is 409 and unknown types are 404', async () => {
+    const { db } = await freshFile()
+    await getShipState(db)
+
+    // WEAPONS is gated behind the WEAPONS SYSTEMS tech (issue #9) — research it directly so this
+    // test keeps covering the cost path; the gate itself is covered in research.test.ts.
+    await db.db.update(schema.tech).set({ researched: true }).where(eq(schema.tech.slug, 'WEAPONS_SYSTEMS'))
+
+    await expect(buildSystem(db, 'WEAPONS')).rejects.toMatchObject({ status: 422 }) // no parts in the hold yet
+
+    await addItem(db, 'part', 'SERVO ACTUATOR', BUILD_PART_COST)
+    const state = await buildSystem(db, 'WEAPONS')
+    const weapons = systemOf(state, 'WEAPONS')
+    expect(weapons.built).toBe(true)
+    expect({ level: weapons.level, capacity: weapons.capacity }).toEqual({ level: BASE_LEVEL, capacity: BASE_CAPACITY })
+    expect(await db.db.select().from(schema.inventoryItems)).toHaveLength(0) // parts row deleted
+    expect(state.turn).toBe(1)
+
+    const event = (await db.db.select().from(schema.events)).find((e) => e.type === 'build')!
+    expect(event.turn).toBe(1)
+    expect(event.message).toContain('WEAPONS')
+
+    await expect(buildSystem(db, 'WEAPONS')).rejects.toMatchObject({ status: 409 }) // already built
+    await expect(buildSystem(db, 'SHIELDS')).rejects.toMatchObject({ status: 404 }) // not a known type
+  })
+})
+
+// --- A/B: resolvers vs the legacy immediate ship actions (Task 4a) ---------------------
+const T0 = '2026-10-01T00:00:00.000Z'
+
+// Stamped save (no backfill), the full ship per SHIP_TYPES, the full tech tree with
+// WEAPONS_SYSTEMS researched (unlocks the BUILD row). Identical build per world → ids line up.
+async function buildShipFixture(db: GameDb): Promise<void> {
+  const [save] = await db.db.insert(schema.saves).values({ seed: '42', turn: 0, createdAt: T0, schemaVersion: SCHEMA_VERSION }).returning()
+  for (const def of SHIP_TYPES) {
+    await db.db.insert(schema.shipSystems).values({ saveId: save.id, type: def.type, level: def.builtAtStart ? BASE_LEVEL : 0, capacity: def.builtAtStart ? BASE_CAPACITY : 0 })
+  }
+  for (const def of TECHS) {
+    await db.db.insert(schema.tech).values({ saveId: save.id, slug: def.slug, name: def.name, costKind: def.costKind, costQty: def.costQty, prerequisites: def.prereqs.join(','), effect: def.effect, researched: def.slug === 'WEAPONS_SYSTEMS' })
+  }
+}
+
+const task = (type: 'SHIP_UPGRADE' | 'SHIP_EXPAND' | 'SHIP_BUILD', payload: object): Task =>
+  ({ id: 0, saveId: 0, type, payload: JSON.stringify(payload), leadCrewId: 0, helpers: [], duration: 0, remaining: 0, status: 'ACTIVE', queuedAtTurn: 0 })
+
+async function snapshot(db: GameDb): Promise<string> {
+  const [saves, systems, routes, planets, inventory, crew, ship, tech, missions, events] = await Promise.all([
+    db.db.select({ id: schema.saves.id, seed: schema.saves.seed, turn: schema.saves.turn, schemaVersion: schema.saves.schemaVersion }).from(schema.saves),
+    db.db.select().from(schema.solarSystems),
+    db.db.select().from(schema.jumpRoutes),
+    db.db.select().from(schema.planets),
+    db.db.select().from(schema.inventoryItems),
+    db.db.select().from(schema.crew),
+    db.db.select().from(schema.shipSystems),
+    db.db.select().from(schema.tech),
+    db.db.select().from(schema.missions),
+    db.db.select({ id: schema.events.id, turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events),
+  ])
+  return JSON.stringify({ saves, systems, routes, planets, inventory, crew, ship, tech, missions, events })
+}
+
+describe('resolveShip* (A/B against the immediate actions)', () => {
+  // A = legacy immediate action (validates, deducts the cost, +1 turn, effect, event).
+  // B = the queued shape: the cost is deducted up front (queueTask did it at queue time —
+  // Task 3), the tick advanced the turn (Task 4b), then the resolver applies the effect.
+  // Same starting world → byte-identical end states.
+
+  it('UPGRADE: lands exactly what upgradeSystem lands', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    await buildShipFixture(a)
+    await buildShipFixture(b)
+    await addItem(a, 'resource', 'IRON ORE', 1) // level 1 → cost 1
+    await addItem(b, 'resource', 'IRON ORE', 1)
+
+    const reactorId = systemOf(await getShipState(a), 'REACTOR').id
+    await upgradeSystem(a, reactorId)
+    await spendItems(b, 1, 'resource', 1) // the queue-time deduction
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+    await resolveShipUpgradeTask(b, task('SHIP_UPGRADE', { systemId: reactorId }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+    const ev = (await b.db.select({ turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events)).find((e) => e.type === 'upgrade')!
+    expect(ev.turn).toBe(1)
+    expect(ev.message).toBe('Upgraded REACTOR to level 2 (cost: 1× resources)')
+  })
+
+  it('EXPAND: lands exactly what expandSystem lands', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    await buildShipFixture(a)
+    await buildShipFixture(b)
+    await addItem(a, 'resource', 'CRYSTAL DUST', 2) // capacity 2 → cost 2
+    await addItem(b, 'resource', 'CRYSTAL DUST', 2)
+
+    const hullId = systemOf(await getShipState(a), 'HULL').id
+    await expandSystem(a, hullId)
+    await spendItems(b, 1, 'resource', 2)
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+    await resolveShipExpandTask(b, task('SHIP_EXPAND', { systemId: hullId }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+    const ev = (await b.db.select({ turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events)).find((e) => e.type === 'expand')!
+    expect(ev.turn).toBe(1)
+    expect(ev.message).toBe('Expanded HULL capacity to 3 (cost: 2× resources)')
+  })
+
+  it('BUILD: lands exactly what buildSystem lands', async () => {
+    const { db: a } = await freshFile()
+    const { db: b } = await freshFile()
+    await buildShipFixture(a)
+    await buildShipFixture(b)
+    await addItem(a, 'part', 'SERVO ACTUATOR', 3)
+    await addItem(b, 'part', 'SERVO ACTUATOR', 3)
+
+    await buildSystem(a, 'WEAPONS')
+    await spendItems(b, 1, 'part', 3)
+    await b.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+    await resolveShipBuildTask(b, task('SHIP_BUILD', { type: 'WEAPONS' }))
+
+    expect(await snapshot(b)).toEqual(await snapshot(a))
+    const ev = (await b.db.select({ turn: schema.events.turn, type: schema.events.type, message: schema.events.message }).from(schema.events)).find((e) => e.type === 'build')!
+    expect(ev.turn).toBe(1)
+    expect(ev.message).toBe('Built WEAPONS at base values (cost: 3× parts)')
+  })
+
+  it('guards: 404 unknown, 409 unbuilt / max level / max capacity / gate / already built', async () => {
+    const { db } = await freshFile()
+    await buildShipFixture(db)
+    const state = await getShipState(db)
+    const reactorId = systemOf(state, 'REACTOR').id
+    const hullId = systemOf(state, 'HULL').id
+    const weaponsId = systemOf(state, 'WEAPONS').id
+    await db.db.update(schema.saves).set({ turn: 1 }).where(eq(schema.saves.id, 1))
+
+    await expect(resolveShipUpgradeTask(db, task('SHIP_UPGRADE', { systemId: 999 }))).rejects.toMatchObject({ status: 404, message: 'Unknown ship system 999' })
+    await expect(resolveShipUpgradeTask(db, task('SHIP_UPGRADE', { systemId: weaponsId }))).rejects.toMatchObject({ status: 409, message: 'WEAPONS is not built' })
+    await db.db.update(schema.shipSystems).set({ level: MAX_LEVEL }).where(eq(schema.shipSystems.id, reactorId))
+    await expect(resolveShipUpgradeTask(db, task('SHIP_UPGRADE', { systemId: reactorId }))).rejects.toMatchObject({ status: 409, message: `REACTOR is at max level (${MAX_LEVEL})` })
+
+    await expect(resolveShipExpandTask(db, task('SHIP_EXPAND', { systemId: 999 }))).rejects.toMatchObject({ status: 404, message: 'Unknown ship system 999' })
+    await db.db.update(schema.shipSystems).set({ capacity: MAX_CAPACITY }).where(eq(schema.shipSystems.id, hullId))
+    await expect(resolveShipExpandTask(db, task('SHIP_EXPAND', { systemId: hullId }))).rejects.toMatchObject({ status: 409, message: `HULL is at max capacity (${MAX_CAPACITY})` })
+
+    await expect(resolveShipBuildTask(db, task('SHIP_BUILD', { type: 'SHIELDS' }))).rejects.toMatchObject({ status: 404, message: 'Unknown ship system type SHIELDS' })
+    await db.db.update(schema.tech).set({ researched: false }).where(eq(schema.tech.slug, 'WEAPONS_SYSTEMS'))
+    await expect(resolveShipBuildTask(db, task('SHIP_BUILD', { type: 'WEAPONS' }))).rejects.toMatchObject({ status: 409, message: 'Building WEAPONS requires the WEAPONS SYSTEMS tech' })
+    await expect(resolveShipBuildTask(db, task('SHIP_BUILD', { type: 'HULL' }))).rejects.toMatchObject({ status: 409, message: 'HULL is already built' })
+  })
+})

lib/game/ship.ts

@@ -0,0 +1,219 @@
+import { eq } from 'drizzle-orm'
+import * as schema from '@/lib/db/schema'
+import { persist, type GameDb } from '@/lib/db/client'
+import { BUILD_PART_COST, BASE_CAPACITY, BASE_LEVEL, SHIP_TYPES, expandCost, upgradeCost } from './ship-costs'
+import { buildGate, effectiveCapacityCap, effectiveLevelCap } from './tech'
+import { ensureSave, type InventoryItemDto } from './save'
+import type { Task, TaskType } from './tasks'
+
+export interface ShipSystemDto {
+  id: number
+  type: string
+  level: number
+  capacity: number
+  built: boolean // derived — level > 0 (unbuilt rows sit at level/capacity 0)
+}
+
+// The ship's full state for the SHIP SYSTEMS tab and left column.
+export interface ShipState {
+  systems: ShipSystemDto[] // display order follows SHIP_TYPES
+  inventory: InventoryItemDto[]
+  turn: number
+}
+
+// Carries an HTTP status so route handlers can map failures to responses without re-parsing.
+export class ShipError extends Error {
+  constructor(
+    public readonly status: number,
+    message: string,
+  ) {
+    super(message)
+  }
+}
+
+async function readShipState(db: GameDb): Promise<ShipState> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const rows = await db.db.select().from(schema.shipSystems)
+  const orderOf = (type: string) => {
+    const i = SHIP_TYPES.findIndex((t) => t.type === type)
+    return i === -1 ? 99 : i // unknown types (shouldn't exist) sort last
+  }
+  const systems = [...rows]
+    .sort((a, b) => orderOf(a.type) - orderOf(b.type))
+    .map((r) => ({ id: r.id, type: r.type, level: r.level, capacity: r.capacity, built: r.level > 0 }))
+  const inventory = (await db.db.select().from(schema.inventoryItems)).map((i) => ({ kind: i.kind as 'resource' | 'part', name: i.name, qty: i.qty }))
+  return { systems, inventory, turn: save.turn }
+}
+
+// The ship's systems + cargo hold + turn. Auto-initializes like the other reads.
+export async function getShipState(db: GameDb): Promise<ShipState> {
+  await ensureSave(db)
+  return readShipState(db)
+}
+
+// Consume `amount` units of one kind from the oldest cargo rows first (id order); rows that hit
+// zero are deleted. The total is checked up front, so an insufficient hold mutates nothing.
+// Exported: research.ts spends tech costs through the same path.
+export async function spendItems(db: GameDb, saveId: number, kind: 'resource' | 'part', amount: number): Promise<void> {
+  const rows = (await db.db.select().from(schema.inventoryItems)).filter((i) => i.kind === kind).sort((a, b) => a.id - b.id)
+  if (rows.reduce((sum, r) => sum + r.qty, 0) < amount) {
+    throw new ShipError(422, `Insufficient ${kind === 'resource' ? 'resources' : 'parts'} in the cargo hold — need ${amount}`)
+  }
+  let remaining = amount
+  for (const row of rows) {
+    if (remaining <= 0) break
+    const take = Math.min(row.qty, remaining)
+    remaining -= take
+    if (take >= row.qty) await db.db.delete(schema.inventoryItems).where(eq(schema.inventoryItems.id, row.id))
+    else await db.db.update(schema.inventoryItems).set({ qty: row.qty - take }).where(eq(schema.inventoryItems.id, row.id))
+  }
+}
+
+// Slugs of the researched techs on this save — drives the effective caps and build gates below.
+async function researchedTechSlugs(db: GameDb): Promise<Set<string>> {
+  return new Set((await db.db.select().from(schema.tech)).filter((t) => t.researched).map((t) => t.slug))
+}
+
+function syntheticTask(type: TaskType, payload: object): Task {
+  return { id: 0, saveId: 0, type, payload: JSON.stringify(payload), leadCrewId: 0, helpers: [], duration: 0, remaining: 0, status: 'ACTIVE', queuedAtTurn: 0 }
+}
+
+// SHIP_UPGRADE — level a built system by one, at whatever level it sits at resolution
+// time. No cost here (deducted at queue time — Task 3 — or by upgradeSystem before
+// delegating); no mission hooks (the current action has none).
+export async function resolveShipUpgradeTask(db: GameDb, task: Task): Promise<void> {
+  await ensureSave(db)
+  const { systemId } = JSON.parse(task.payload) as { systemId: number }
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.id === systemId)
+  if (!target) throw new ShipError(404, `Unknown ship system ${systemId}`)
+  if (target.level <= 0) throw new ShipError(409, `${target.type} is not built`)
+  const maxLevel = effectiveLevelCap(target.type, await researchedTechSlugs(db))
+  if (target.level >= maxLevel) throw new ShipError(409, `${target.type} is at max level (${maxLevel})`)
+
+  const cost = upgradeCost(target.level)
+  await db.db.update(schema.shipSystems).set({ level: target.level + 1 }).where(eq(schema.shipSystems.id, target.id))
+  await db.db.insert(schema.events).values({ saveId: save.id, turn: save.turn, type: 'upgrade', message: `Upgraded ${target.type} to level ${target.level + 1} (cost: ${cost}× resources)`, createdAt: new Date().toISOString() })
+  await persist(db)
+}
+
+// SHIP_EXPAND — same shape for capacity (cost: `capacity` units of any resource, deducted).
+export async function resolveShipExpandTask(db: GameDb, task: Task): Promise<void> {
+  await ensureSave(db)
+  const { systemId } = JSON.parse(task.payload) as { systemId: number }
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.id === systemId)
+  if (!target) throw new ShipError(404, `Unknown ship system ${systemId}`)
+  if (target.level <= 0) throw new ShipError(409, `${target.type} is not built`)
+  const maxCapacity = effectiveCapacityCap(target.type, await researchedTechSlugs(db))
+  if (target.capacity >= maxCapacity) throw new ShipError(409, `${target.type} is at max capacity (${maxCapacity})`)
+
+  const cost = expandCost(target.capacity)
+  await db.db.update(schema.shipSystems).set({ capacity: target.capacity + 1 }).where(eq(schema.shipSystems.id, target.id))
+  await db.db.insert(schema.events).values({ saveId: save.id, turn: save.turn, type: 'expand', message: `Expanded ${target.type} capacity to ${target.capacity + 1} (cost: ${cost}× resources)`, createdAt: new Date().toISOString() })
+  await persist(db)
+}
+
+// SHIP_BUILD — build an unbuilt type at base values. The flat parts cost is already
+// deducted; some types are gated behind a researched tech (see EFFECTS in lib/game/tech.ts).
+export async function resolveShipBuildTask(db: GameDb, task: Task): Promise<void> {
+  await ensureSave(db)
+  const { type } = JSON.parse(task.payload) as { type: string }
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.type === type)
+  if (!target) throw new ShipError(404, `Unknown ship system type ${type}`)
+  if (target.level > 0) throw new ShipError(409, `${target.type} is already built`)
+  const gate = buildGate(type, await researchedTechSlugs(db))
+  if (gate) throw new ShipError(409, `Building ${type} requires the ${gate} tech`)
+
+  await db.db.update(schema.shipSystems).set({ level: BASE_LEVEL, capacity: BASE_CAPACITY }).where(eq(schema.shipSystems.id, target.id))
+  await db.db.insert(schema.events).values({ saveId: save.id, turn: save.turn, type: 'build', message: `Built ${target.type} at base values (cost: ${BUILD_PART_COST}× parts)`, createdAt: new Date().toISOString() })
+  await persist(db)
+}
+
+// The upgrade pre-checks, extracted for the queueing route (5a(ii)): the same codes and
+// messages as upgradeSystem — unknown system (404), not built (409), at max level (409).
+// Cost, turn and the level-up effect stay out: the queueing path deducts at queue time
+// (queueTask) and the effect lands when the task completes on the tick.
+export async function checkUpgradePreconditions(db: GameDb, systemId: number): Promise<void> {
+  await ensureSave(db)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.id === systemId)
+  if (!target) throw new ShipError(404, `Unknown ship system ${systemId}`)
+  if (target.level <= 0) throw new ShipError(409, `${target.type} is not built`)
+  const maxLevel = effectiveLevelCap(target.type, await researchedTechSlugs(db))
+  if (target.level >= maxLevel) throw new ShipError(409, `${target.type} is at max level (${maxLevel})`)
+}
+
+// UPGRADE — level up a built system by one (capped at the effective max level, raised by techs).
+export async function upgradeSystem(db: GameDb, systemId: number): Promise<ShipState> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.id === systemId)
+  if (!target) throw new ShipError(404, `Unknown ship system ${systemId}`)
+  if (target.level <= 0) throw new ShipError(409, `${target.type} is not built`)
+  const maxLevel = effectiveLevelCap(target.type, await researchedTechSlugs(db))
+  if (target.level >= maxLevel) throw new ShipError(409, `${target.type} is at max level (${maxLevel})`)
+
+  await spendItems(db, save.id, 'resource', upgradeCost(target.level))
+  const turn = save.turn + 1
+  await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
+  await resolveShipUpgradeTask(db, syntheticTask('SHIP_UPGRADE', { systemId }))
+  return readShipState(db)
+}
+
+// The expand pre-checks, extracted for the queueing route (5a(ii)): the same codes and
+// messages as expandSystem — unknown system (404), not built (409), at max capacity (409).
+export async function checkExpandPreconditions(db: GameDb, systemId: number): Promise<void> {
+  await ensureSave(db)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.id === systemId)
+  if (!target) throw new ShipError(404, `Unknown ship system ${systemId}`)
+  if (target.level <= 0) throw new ShipError(409, `${target.type} is not built`)
+  const maxCapacity = effectiveCapacityCap(target.type, await researchedTechSlugs(db))
+  if (target.capacity >= maxCapacity) throw new ShipError(409, `${target.type} is at max capacity (${maxCapacity})`)
+}
+
+// EXPAND — raise a built system's capacity by one (capped at the effective max capacity, raised by techs).
+export async function expandSystem(db: GameDb, systemId: number): Promise<ShipState> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.id === systemId)
+  if (!target) throw new ShipError(404, `Unknown ship system ${systemId}`)
+  if (target.level <= 0) throw new ShipError(409, `${target.type} is not built`)
+  const maxCapacity = effectiveCapacityCap(target.type, await researchedTechSlugs(db))
+  if (target.capacity >= maxCapacity) throw new ShipError(409, `${target.type} is at max capacity (${maxCapacity})`)
+
+  await spendItems(db, save.id, 'resource', expandCost(target.capacity))
+  const turn = save.turn + 1
+  await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
+  await resolveShipExpandTask(db, syntheticTask('SHIP_EXPAND', { systemId }))
+  return readShipState(db)
+}
+
+// The build pre-checks, extracted for the queueing route (5a(ii)): the same codes and
+// messages as buildSystem — unknown type (404), already built (409), build-gate tech
+// missing (409). The parts cost stays out: the queueing path deducts it at queue time.
+export async function checkBuildPreconditions(db: GameDb, type: string): Promise<void> {
+  await ensureSave(db)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.type === type)
+  if (!target) throw new ShipError(404, `Unknown ship system type ${type}`)
+  if (target.level > 0) throw new ShipError(409, `${target.type} is already built`)
+  const gate = buildGate(type, await researchedTechSlugs(db))
+  if (gate) throw new ShipError(409, `Building ${type} requires the ${gate} tech`)
+}
+
+// BUILD — build an unbuilt type at base values. Cost: a flat amount of parts.
+export async function buildSystem(db: GameDb, type: string): Promise<ShipState> {
+  await ensureSave(db)
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const target = (await db.db.select().from(schema.shipSystems)).find((s) => s.type === type)
+  if (!target) throw new ShipError(404, `Unknown ship system type ${type}`)
+  if (target.level > 0) throw new ShipError(409, `${target.type} is already built`)
+  const gate = buildGate(type, await researchedTechSlugs(db))
+  if (gate) throw new ShipError(409, `Building ${type} requires the ${gate} tech`)
+
+  await spendItems(db, save.id, 'part', BUILD_PART_COST)
+  const turn = save.turn + 1
+  await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
+  await resolveShipBuildTask(db, syntheticTask('SHIP_BUILD', { type }))
+  return readShipState(db)
+}

lib/game/tasks.test.ts

@@ -0,0 +1,277 @@
+import { describe, expect, it } from 'vitest'
+import type { CrewMember } from './crew'
+import { MISMATCH_CANCEL_TRAIT, PREFERRED_ROLES, POWER_BANDS, RECRUIT_CHANCE_BASE, RECRUIT_CHANCE_TALKER, STARTING_LEVELS, TRAIT_DURATION_MODIFIERS, WORK_POINTS, XP_THRESHOLDS } from './crew-costs'
+import type { CrewDto } from './save'
+import { computeDuration, queueTask, tickTurn, TaskError, type QueueState, type Task, type TaskType } from './tasks'
+
+// Trait strings copied verbatim from lib/game/crew.ts GOOD_TRAITS/BAD_TRAITS — TRAIT_DURATION_MODIFIERS
+// is keyed by exactly these strings, so a rename in crew.ts breaks these tests.
+const NEUTRAL_GOOD = 'FINDS HIDDEN THINGS' // no duration entry → no effect
+const NEUTRAL_BAD = 'JINXED IN A DOGFIGHT' // STANDBY combat trait → no duration effect
+const crew = (role: string, traitGood = NEUTRAL_GOOD, traitBad = NEUTRAL_BAD): CrewMember => ({ name: 'TEST', role, traitGood, traitBad })
+const WORK: Record<TaskType, number> = { JUMP: 3, EXPLORE: 4, SHIP_UPGRADE: 6, SHIP_EXPAND: 6, SHIP_BUILD: 6, RESEARCH: 9 }
+const TYPES = Object.keys(WORK) as TaskType[]
+const SHIP: TaskType[] = ['SHIP_UPGRADE', 'SHIP_EXPAND', 'SHIP_BUILD']
+
+describe('solo baselines (one crew, power 1, no modifiers)', () => {
+  it('work points are the duration for the preferred role: EXPLORE 4 · JUMP 3 / 6 · SHIP 6 · RESEARCH 9', () => {
+    for (const type of TYPES) {
+      expect(computeDuration(type, 1, crew(PREFERRED_ROLES[type][0]), [])).toBe(WORK[type])
+    }
+    expect(computeDuration('JUMP', 2, crew('PILOT'), [])).toBe(6) // two-hop = 2 × 3
+  })
+})
+
+describe('role mismatch (lead only, helpers never penalised)', () => {
+  it('a lead outside the preferred role adds +1; helpers contribute power only', () => {
+    expect(computeDuration('JUMP', 1, crew('SCIENTIST'), [])).toBe(4) // 3 + 1 mismatch
+    expect(computeDuration('JUMP', 1, crew('SCIENTIST'), [crew('PILOT')])).toBe(3) // ceil(3/2) + 1 — power 2, mismatch still on the lead
+    expect(computeDuration('EXPLORE', 1, crew('SCIENTIST'), [crew('PILOT', 'QUICK HANDS')])).toBe(2) // 4/2 — the helper's trait does not apply
+  })
+  it('STEADY UNDER PRESSURE cancels the mismatch penalty and adds nothing of its own', () => {
+    expect(computeDuration('JUMP', 1, crew('SCIENTIST', 'STEADY UNDER PRESSURE'), [])).toBe(3)
+    expect(computeDuration('EXPLORE', 1, crew('SCIENTIST', 'STEADY UNDER PRESSURE'), [])).toBe(4)
+  })
+})
+
+describe('floor', () => {
+  it('never returns below 1 turn', () => {
+    const lead = crew('PILOT', 'QUICK HANDS')
+    expect(computeDuration('JUMP', 1, lead, [crew('PILOT'), crew('PILOT')], () => 3)).toBe(1) // ceil(3/9) − 1 = 0 → floor 1
+  })
+})
+
+// All 15 duration traits from spec §5, each tested once in its own action context (plus its
+// non-applicable types). target 'SHIP_UPGRADE' stands for the whole "SHIP work" class.
+const TABLE: [trait: string, isGood: boolean, target: TaskType | 'ANY', delta: number][] = [
+  ['RECKLESS COURAGE', true, 'JUMP', -1],
+  ['CALM IN A CRISIS', true, 'EXPLORE', -1],
+  ['FIXES ANYTHING', true, 'SHIP_UPGRADE', -1],
+  ['READS STARS BLIND', true, 'JUMP', -1],
+  ['QUICK HANDS', true, 'ANY', -1],
+  ['IRON WILL', true, 'RESEARCH', -1],
+  ['RIGID — SLOW TO ADAPT', false, 'RESEARCH', 1],
+  ['OVERCAUTIOUS', false, 'ANY', 1],
+  ['SLOWS THE CREW DOWN', false, 'ANY', 1],
+  ['CARELESS WITH FUSES', false, 'SHIP_UPGRADE', 1],
+  ['HOARDS RATIONS', false, 'SHIP_UPGRADE', 1],
+  ['FORGETS TO EAT', false, 'EXPLORE', 1],
+  ['ARGUES WITH EVERYONE', false, 'RESEARCH', 1],
+  ['DOUBTS THE CAPTAIN', false, 'JUMP', 1],
+]
+
+describe('the 15 duration traits (spec §5, exact strings from crew.ts)', () => {
+  const applies = (type: TaskType, target: TaskType | 'ANY') => {
+    if (target === 'ANY') return true
+    if (target === type) return true
+    return SHIP.includes(target) && SHIP.includes(type) // "SHIP work" class: any SHIP type → any SHIP type
+  }
+  it('each trait shifts only its own action class, lead only, across all six types', () => {
+    for (const [trait, isGood, target, delta] of TABLE) {
+      for (const type of TYPES) {
+        const lead = isGood ? crew(PREFERRED_ROLES[type][0], trait) : crew(PREFERRED_ROLES[type][0], NEUTRAL_GOOD, trait)
+        expect(computeDuration(type, 1, lead, []), `${trait} → ${type}`).toBe(WORK[type] + (applies(type, target) ? delta : 0))
+      }
+    }
+  })
+})
+
+describe('crew-costs — the §11 tuning surface', () => {
+  it('pins the balance knobs', () => {
+    expect(WORK_POINTS).toEqual({ EXPLORE: 4, JUMP_PER_HOP: 3, SHIP_WORK: 6, RESEARCH: 9 })
+    expect(XP_THRESHOLDS).toEqual([5, 10, 15, 20, 25])
+    expect(POWER_BANDS).toEqual([1, 1, 1, 2, 2, 3]) // L0–L2 → 1 · L3–L4 → 2 · L5 → 3
+    expect(STARTING_LEVELS.PILOT).toEqual({ NAVIGATION: 2, SCANNING: 0, ENGINEERING: 0, RESEARCH: 0 })
+    expect(STARTING_LEVELS.SCIENTIST).toEqual({ NAVIGATION: 0, SCANNING: 2, ENGINEERING: 0, RESEARCH: 2 })
+    expect(STARTING_LEVELS.COMMANDER).toEqual({ NAVIGATION: 0, SCANNING: 0, ENGINEERING: 0, RESEARCH: 0 })
+    expect(RECRUIT_CHANCE_BASE).toBe(0.18)
+    expect(RECRUIT_CHANCE_TALKER).toBe(0.3)
+    expect(Object.keys(TRAIT_DURATION_MODIFIERS)).toHaveLength(15) // all 15 duration traits of spec §5, nothing else
+    expect(TRAIT_DURATION_MODIFIERS[MISMATCH_CANCEL_TRAIT]).toEqual({}) // its effect is the cancel, not an additive modifier
+  })
+})
+
+// Shared queue fixtures (file scope — reused by the queueTask and tickTurn blocks): the roster,
+// a state factory (turn 10, empty queue) and a one-turn row factory.
+// The roster: a PILOT lead, an ENGINEER helper, a SCIENTIST third member. `origin` fills
+// the CrewDto shape (unused by the duration model but part of the type).
+const CREW: CrewDto[] = [
+  { id: 1, name: 'AVA VANCE', role: 'PILOT', traitGood: 'QUICK HANDS', traitBad: 'OVERCAUTIOUS', origin: 'STARTING CREW' },
+  { id: 2, name: 'BEN OKONKWO', role: 'ENGINEER', traitGood: 'FIXES ANYTHING', traitBad: 'HOARDS RATIONS', origin: 'STARTING CREW' },
+  { id: 3, name: 'CASS SORENSEN', role: 'SCIENTIST', traitGood: 'CALM IN A CRISIS', traitBad: 'FORGETS TO EAT', origin: 'STARTING CREW' },
+]
+
+const state = (over: Partial<QueueState> = {}): QueueState => ({ turn: 10, crew: CREW, tasks: [], inventory: [], shipSystems: [], tech: [], ...over })
+const task = (over: Partial<Task> = {}): Task => ({ id: 90, saveId: 1, type: 'SHIP_UPGRADE', payload: '{}', leadCrewId: 1, helpers: [], duration: 1, remaining: 1, status: 'ACTIVE', queuedAtTurn: 9, ...over })
+
+describe('queueTask', () => {
+  // Sync twin of the rejects.toMatchObject house style — queueTask throws instead of rejecting.
+  const expectErr = (fn: () => unknown, status: number, message?: RegExp): void => {
+    let err: unknown
+    try {
+      fn()
+    } catch (e) {
+      err = e
+    }
+    expect(err).toBeInstanceOf(TaskError)
+    expect((err as TaskError).status).toBe(status)
+    if (message) expect((err as TaskError).message).toMatch(message)
+  }
+
+  it('unknown lead or helper id → 404', () => {
+    expectErr(() => queueTask(state(), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 42, helperCrewIds: [] }), 404, /Unknown crew member 42/)
+    expectErr(() => queueTask(state(), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [42] }), 404, /Unknown crew member 42/)
+  })
+
+  it('busy lead → 409 — already committed to a PENDING task (as lead or helper of one)', () => {
+    expectErr(() => queueTask(state({ tasks: [task({ status: 'PENDING' })] }), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [] }), 409, /AVA VANCE is already committed to a pending task/)
+    expectErr(() => queueTask(state({ tasks: [task({ id: 91, leadCrewId: 3, helpers: [1], status: 'PENDING' })] }), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [] }), 409, /AVA VANCE is already committed to a pending task/)
+  })
+
+  it('busy helper → 409 — on an ACTIVE task, or committed to a PENDING one', () => {
+    expectErr(() => queueTask(state({ tasks: [task({ leadCrewId: 3, helpers: [2] })] }), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [2] }), 409, /BEN OKONKWO is already busy/)
+    expectErr(() => queueTask(state({ tasks: [task({ id: 91, leadCrewId: 3, helpers: [2], status: 'PENDING' })] }), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [2] }), 409, /BEN OKONKWO is already committed to a pending task/)
+  })
+
+  it('in transit (a JUMP is ACTIVE) → 409 for a non-jump action', () => {
+    expectErr(() => queueTask(state({ tasks: [task({ id: 91, type: 'JUMP', leadCrewId: 3 })] }), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [] }), 409, /in transit/)
+  })
+
+  it('second jump → 409 while one is pending', () => {
+    expectErr(() => queueTask(state({ tasks: [task({ id: 91, type: 'JUMP', leadCrewId: 3, status: 'PENDING' })] }), { type: 'JUMP', payload: { systemId: 2, hops: 1 }, leadCrewId: 1, helperCrewIds: [] }), 409, /A jump is already queued/)
+  })
+
+  it('SHIP / RESEARCH cost deducts at queue time; shortfall → the existing 422', () => {
+    const hold = [{ kind: 'resource' as const, name: 'IRON', qty: 5 }, { kind: 'part' as const, name: 'ALLOY', qty: 4 }]
+    const systems = [{ id: 7, type: 'REACTOR', level: 2, capacity: 3 }]
+    const techRows = [{ id: 3, slug: 'REACTOR_OVERCLOCK' }] // the def's cost: 3 resources (TECHS)
+    const upgraded = queueTask(state({ inventory: hold, shipSystems: systems, tech: techRows }), { type: 'SHIP_UPGRADE', payload: { systemId: 7 }, leadCrewId: 2, helperCrewIds: [] })
+    expect(upgraded.inventory).toEqual([{ kind: 'resource', name: 'IRON', qty: 3 }, { kind: 'part', name: 'ALLOY', qty: 4 }]) // upgradeCost(2) = 2, oldest row first
+    const shortHold = [{ kind: 'resource' as const, name: 'IRON', qty: 2 }]
+    expectErr(() => queueTask(state({ inventory: shortHold, tech: techRows }), { type: 'RESEARCH', payload: { techId: 3 }, leadCrewId: 2, helperCrewIds: [] }), 422, /Insufficient resources in the cargo hold — need 3/)
+  })
+
+  it('ACTIVE-vs-PENDING rule: PENDING while the lead is busy (no turn change); all free → ACTIVE', () => {
+    const s = state({ tasks: [task({ leadCrewId: 1 })] })
+    const pending = queueTask(s, { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [2] })
+    expect(pending.task.status).toBe('PENDING')
+    expect(pending.task.remaining).toBe(computeDuration('EXPLORE', 0, CREW[0], [CREW[1]]))
+    expect(pending.task.queuedAtTurn).toBe(10)
+    expect(s.turn).toBe(10) // queueing never advances the turn — only the tick does
+    const active = queueTask(state(), { type: 'EXPLORE', payload: { planetId: 5 }, leadCrewId: 1, helperCrewIds: [2] })
+    expect(active.task.status).toBe('ACTIVE')
+    expect(active.task.remaining).toBe(computeDuration('EXPLORE', 0, CREW[0], [CREW[1]]))
+    expect(active.task.queuedAtTurn).toBe(10)
+  })
+})
+
+// --- The turn tick: decrement, resolve, FIFO auto-start (pure — no DB) -------------------
+//
+// tickTurn is the whole §3 tick over the same plain QueueState queueTask consumes. It owns
+// the turn increment and nothing else: it applies no effect and runs no mission logic —
+// the save.ts orchestrator (runTurn) calls the 4a resolvers for the returned `completed`
+// tasks, in the order returned.
+describe('tickTurn', () => {
+  // The queueTask block's file-scope fixture helpers (above): CREW = [1 AVA PILOT,
+  // 2 BEN ENGINEER, 3 CASS SCIENTIST]; state() → { turn: 10, crew: CREW, tasks: [], … };
+  // task() → a one-turn row. The tick never parses payloads — the targets below are inert.
+  const JUMP = (id: number, over: Partial<Task> = {}): Task => task({ id, type: 'JUMP', payload: '{"systemId":2,"hops":1}', ...over })
+  const EXPLORE = (id: number, planetId: number, over: Partial<Task> = {}): Task => task({ id, type: 'EXPLORE', payload: `{"planetId":${planetId}}`, ...over })
+
+  it('decrements every ACTIVE task by one; a task that hits 0 is DONE (its team freed); PENDING rows do not age; the input is never mutated', () => {
+    const s = state({
+      tasks: [
+        JUMP(1, { duration: 3, remaining: 3, leadCrewId: 1, queuedAtTurn: 8 }),
+        EXPLORE(2, 5, { leadCrewId: 3, helpers: [2], duration: 1, remaining: 1, queuedAtTurn: 9 }),
+        EXPLORE(3, 6, { leadCrewId: 1, duration: 4, remaining: 4, status: 'PENDING', queuedAtTurn: 10 }), // member 1 is on ACTIVE 1
+      ],
+    })
+
+    const r = tickTurn(s)
+    expect(r.turn).toBe(11) // the tick is the increment
+    expect(r.tasks.find((t) => t.id === 1)!.remaining).toBe(2)
+    expect(r.tasks.find((t) => t.id === 1)!.status).toBe('ACTIVE')
+    expect(r.tasks.find((t) => t.id === 2)!.status).toBe('DONE')
+    expect(r.completed.map((t) => t.id)).toEqual([2])
+    expect(r.tasks.find((t) => t.id === 3)!.status).toBe('PENDING')
+    expect(r.tasks.find((t) => t.id === 3)!.remaining).toBe(4) // pending does not age
+    expect(s.tasks.find((t) => t.id === 1)!.remaining).toBe(3) // input state untouched
+  })
+
+  it('a 3-deep PENDING chain on one lead: when the lead task completes, exactly ONE successor starts — earliest queuedAtTurn wins (Review Focus 2)', () => {
+    let s = state({
+      tasks: [
+        JUMP(9, { duration: 3, remaining: 1, leadCrewId: 1, queuedAtTurn: 5 }),
+        EXPLORE(10, 5, { leadCrewId: 1, duration: 2, remaining: 2, status: 'PENDING', queuedAtTurn: 8 }),
+        EXPLORE(11, 6, { leadCrewId: 1, duration: 2, remaining: 2, status: 'PENDING', queuedAtTurn: 9 }),
+        EXPLORE(12, 7, { leadCrewId: 1, duration: 1, remaining: 1, status: 'PENDING', queuedAtTurn: 10 }),
+      ],
+    })
+    let r = tickTurn(s)
+    expect(r.completed.map((t) => t.id)).toEqual([9])
+    expect(r.tasks.find((t) => t.id === 9)!.status).toBe('DONE')
+    expect(r.tasks.find((t) => t.id === 10)!.status).toBe('ACTIVE') // earliest queuedAtTurn starts
+    expect(r.tasks.find((t) => t.id === 10)!.remaining).toBe(2) // full duration — first decrement next tick
+    expect(r.tasks.find((t) => t.id === 11)!.status).toBe('PENDING') // the others wait for their own tick
+    expect(r.tasks.find((t) => t.id === 12)!.status).toBe('PENDING')
+
+    // Walk the chain to the end: each successor starts on exactly the tick its predecessor completes.
+    const EXPECT: [completed: number[], active: number[]][] = [
+      [[], [10]],
+      [[10], [11]],
+      [[], [11]],
+      [[11], [12]],
+      [[12], []],
+    ]
+    for (const [done, active] of EXPECT) {
+      s = { ...s, turn: r.turn, tasks: r.tasks }
+      r = tickTurn(s)
+      expect(r.completed.map((t) => t.id)).toEqual(done)
+      expect(r.tasks.filter((t) => t.status === 'ACTIVE').map((t) => t.id)).toEqual(active)
+    }
+    expect(r.turn).toBe(16) // 10 + 1 (the first tick) + 5 (the walk)
+    expect(r.tasks.every((t) => t.status === 'DONE')).toBe(true)
+  })
+
+  it('same queuedAtTurn ties break by id, and a started task blocks a later one sharing a member — at most one start per freed member (Review Focus 2, corrupt-row half)', () => {
+    // queueTask forbids a member committed to two PENDINGs (rule 2), so this shape only
+    // exists on admin-corrupted rows — the tick must still be deterministic about it.
+    const s = state({
+      tasks: [
+        JUMP(19, { duration: 1, remaining: 1, leadCrewId: 1, queuedAtTurn: 5 }),
+        EXPLORE(20, 5, { leadCrewId: 2, helpers: [3], duration: 2, remaining: 2, status: 'PENDING', queuedAtTurn: 8 }),
+        EXPLORE(21, 6, { leadCrewId: 3, helpers: [2], duration: 2, remaining: 2, status: 'PENDING', queuedAtTurn: 8 }),
+      ],
+    })
+    const r = tickTurn(s)
+    expect(r.tasks.find((t) => t.id === 20)!.status).toBe('ACTIVE') // (8, 20) < (8, 21) — starts first and takes members 2 and 3
+    expect(r.tasks.find((t) => t.id === 21)!.status).toBe('PENDING')
+  })
+
+  it('a JUMP and an EXPLORE can both resolve on the same tick — completion is location-independent (Review Focus 3, tick half)', () => {
+    const s = state({
+      tasks: [
+        EXPLORE(1, 5, { leadCrewId: 1, duration: 1, remaining: 1, queuedAtTurn: 8 }),
+        JUMP(2, { leadCrewId: 2, duration: 1, remaining: 1, queuedAtTurn: 8 }),
+      ],
+    })
+    const r = tickTurn(s)
+    expect(r.completed.map((t) => t.id)).toEqual([1, 2]) // both this tick, queue order (explore first)
+    expect(r.tasks.find((t) => t.id === 1)!.status).toBe('DONE')
+    expect(r.tasks.find((t) => t.id === 2)!.status).toBe('DONE')
+  })
+
+  it('free skip: an empty queue advances exactly one turn and changes nothing; a fully-free PENDING still starts (Review Focus 4)', () => {
+    const r = tickTurn(state())
+    expect(r.turn).toBe(11)
+    expect(r.tasks).toEqual([])
+    expect(r.completed).toEqual([])
+
+    // No ACTIVE tasks and a startable PENDING (a corrupt-row shape — a legal PENDING always
+    // has a busy member): the pass still starts it. Skipping means "no resolution", not
+    // "no starts".
+    const r2 = tickTurn(state({ tasks: [EXPLORE(30, 5, { leadCrewId: 1, helpers: [2, 3], duration: 3, remaining: 3, status: 'PENDING', queuedAtTurn: 9 })] }))
+    expect(r2.turn).toBe(11)
+    expect(r2.tasks.find((t) => t.id === 30)!.status).toBe('ACTIVE')
+  })
+})

lib/game/tasks.ts

@@ -0,0 +1,260 @@
+// Pure task-engine model (spec §3–§4): the task types and the duration formula. No lib/db
+// imports — the frontend imports this for the live duration preview in the crew picker
+// (same precedent as tech.ts / ship-costs.ts).
+import { MISMATCH_CANCEL_TRAIT, PREFERRED_ROLES, TRAIT_DURATION_MODIFIERS, WORK_POINTS } from './crew-costs'
+import type { CrewMember } from './crew'
+import type { CrewDto, InventoryItemDto } from './save'
+import { BUILD_PART_COST, expandCost, totalQty, upgradeCost } from './ship-costs'
+import { TECHS } from './tech'
+
+export type TaskType = 'JUMP' | 'EXPLORE' | 'SHIP_UPGRADE' | 'SHIP_EXPAND' | 'SHIP_BUILD' | 'RESEARCH'
+
+export type TaskStatus = 'ACTIVE' | 'PENDING' | 'DONE'
+
+// One queued/active/done action (spec §3). `payload` is a JSON string whose shape depends on
+// the TaskType: JUMP {systemId, hops} · SHIP_UPGRADE/EXPAND {systemId} · SHIP_BUILD {type} ·
+// RESEARCH {techId} · EXPLORE {planetId}.
+export interface Task {
+  id: number
+  saveId: number
+  type: TaskType
+  payload: string
+  leadCrewId: number
+  helpers: number[]
+  duration: number
+  remaining: number
+  status: TaskStatus
+  queuedAtTurn: number
+}
+
+// Work points per action (spec §4): JUMP scales with hop count, the rest are flat.
+function workPoints(type: TaskType, hopCount: number): number {
+  switch (type) {
+    case 'JUMP':
+      return hopCount * WORK_POINTS.JUMP_PER_HOP
+    case 'EXPLORE':
+      return WORK_POINTS.EXPLORE
+    case 'RESEARCH':
+      return WORK_POINTS.RESEARCH
+    default:
+      return WORK_POINTS.SHIP_WORK // SHIP_UPGRADE | SHIP_EXPAND | SHIP_BUILD
+  }
+}
+
+// One trait's modifier for a lead on an action type: its per-type entry plus the 'ANY' entry.
+// Traits without a map entry contribute 0.
+function traitModifier(trait: string, type: TaskType): number {
+  const mods = TRAIT_DURATION_MODIFIERS[trait]
+  if (!mods) return 0
+  return (mods[type] ?? 0) + (mods['ANY'] ?? 0)
+}
+
+// duration = max(1, ceil(work / totalPower) + mismatchPenalty + traitModifierSum) — spec §4.
+// totalPower = Σ powerOf over the WHOLE team (lead + helpers); the default powerOf is the
+// constant 1 until PR B feeds the skill band. The mismatch penalty and the trait modifiers
+// apply to the LEAD only — helpers contribute power, are never penalised, and their traits do
+// not apply. `hopCount` is only meaningful for JUMP (pass 1 for the other types).
+export function computeDuration(
+  type: TaskType,
+  hopCount: number,
+  lead: CrewMember,
+  helpers: CrewMember[],
+  powerOf: (m: CrewMember) => number = () => 1,
+): number {
+  const totalPower = Math.max(1, [lead, ...helpers].reduce((sum, m) => sum + powerOf(m), 0))
+  const mismatchPenalty = lead.traitGood === MISMATCH_CANCEL_TRAIT || PREFERRED_ROLES[type].includes(lead.role) ? 0 : 1
+  const traitModifierSum = traitModifier(lead.traitGood, type) + traitModifier(lead.traitBad, type)
+  return Math.max(1, Math.ceil(workPoints(type, hopCount) / totalPower) + mismatchPenalty + traitModifierSum)
+}
+
+// --- Queueing: validation + row construction (pure, no DB) -------------------------------
+//
+// queueTask runs over a plain snapshot of the save (QueueState) and decides whether a new
+// task can be queued and what row it becomes. Pure like crew.ts / ship-costs.ts — the route
+// (a later task) maps schema rows into QueueState, calls queueTask, and persists the result:
+// insert the task row (adding `id` + `saveId` at the DB boundary) and the deducted hold.
+
+// Carries an HTTP status so route handlers can map failures to responses without re-parsing
+// (same pattern as JumpError / ShipError / ResearchError / ExploreError).
+export class TaskError extends Error {
+  constructor(
+    public readonly status: number,
+    message: string,
+  ) {
+    super(message)
+  }
+}
+
+// The queueing request — the existing endpoints' bodies plus the crew team. Payload field
+// names follow the routes (the spec's names differ):
+//   JUMP { systemId, hops }  — the route computes `hops` with jumpToSystem's logic
+//   (reachableWithin + NAV AI) and passes it in; the body field is `systemId`, not `toSystemId`
+//   EXPLORE { planetId }
+//   SHIP_UPGRADE { systemId } · SHIP_EXPAND { systemId } · SHIP_BUILD { type }
+//   RESEARCH { techId }      — the tech row's id, not the slug
+export interface QueueTaskRequest {
+  type: TaskType
+  payload: Record<string, unknown>
+  leadCrewId: number
+  helperCrewIds: number[]
+}
+
+// Plain per-save snapshot the decision runs over — the route maps schema rows into these
+// (same row↔domain boundary as the tasks table in save.ts).
+export interface QueueState {
+  turn: number
+  crew: CrewDto[]
+  tasks: Task[]
+  inventory: InventoryItemDto[] // cargo hold, id order (oldest first)
+  shipSystems: { id: number; type: string; level: number; capacity: number }[] // UPGRADE/EXPAND costs scale with the target's current level/capacity
+  tech: { id: number; slug: string }[] // RESEARCH cost comes from the matching TECHS def, like research.ts
+}
+
+// The new row minus the two values only the DB boundary knows: `id` (autoincrement) and
+// `saveId` (filled in by save.ts's row↔Task mapping on insert).
+export interface QueueResult {
+  task: Omit<Task, 'id' | 'saveId'>
+  inventory: InventoryItemDto[] // unchanged for JUMP/EXPLORE; deducted for SHIP_* / RESEARCH
+}
+
+// Queue a task. Validation order: unknown crew (404) → busy (409) → in transit (409, all
+// types) → second jump (409) → cost (422, SHIP_* / RESEARCH only). Never advances the turn.
+export function queueTask(state: QueueState, req: QueueTaskRequest): QueueResult {
+  const lead = state.crew.find((c) => c.id === req.leadCrewId)
+  if (!lead) throw new TaskError(404, `Unknown crew member ${req.leadCrewId}`)
+  const helpers: CrewDto[] = []
+  for (const id of req.helperCrewIds) {
+    const helper = state.crew.find((c) => c.id === id)
+    if (!helper) throw new TaskError(404, `Unknown crew member ${id}`)
+    helpers.push(helper)
+  }
+
+  // Busy (409). Spec §3: one ACTIVE task per crew member, and a lead may chain one PENDING
+  // task behind it (FIFO — auto-starts when the current one completes). So: any crew member
+  // committed to a PENDING task is blocked; a helper on an ACTIVE task is blocked; a lead on
+  // an ACTIVE task passes and the new task is queued PENDING behind it.
+  const inStatus = (id: number, status: TaskStatus) => state.tasks.some((t) => t.status === status && (t.leadCrewId === id || t.helpers.includes(id)))
+  const checkBusy = (c: CrewDto, isLead: boolean) => {
+    if (inStatus(c.id, 'PENDING')) throw new TaskError(409, `${c.name} is already committed to a pending task`)
+    if (!isLead && inStatus(c.id, 'ACTIVE')) throw new TaskError(409, `${c.name} is already busy`)
+  }
+  checkBusy(lead, true)
+  for (const helper of helpers) checkBusy(helper, false)
+
+  // In transit (409): while any JUMP is ACTIVE, no new tasks of any type (spec §3).
+  const jumps = state.tasks.filter((t) => t.type === 'JUMP')
+  if (jumps.some((t) => t.status === 'ACTIVE')) throw new TaskError(409, 'A jump is in transit — no new tasks can be queued')
+  // Only one JUMP at a time, active or pending (two arrivals could never resolve on one tick).
+  // The ACTIVE half is already caught above, so this fires on a pending jump.
+  if (req.type === 'JUMP' && jumps.some((t) => t.status !== 'DONE')) throw new TaskError(409, 'A jump is already queued')
+
+  // Costs deduct at queue time (spec §3) — the existing cost logic from ship-costs.ts /
+  // tech.ts and spendItems' 422. JUMP/EXPLORE have no resource cost. Target existence and
+  // the 409 gates (max level / capacity, not built, already built, build gate, tech prereqs)
+  // stay in the routes with their existing codes — the route resolves ids before calling.
+  let inventory = state.inventory
+  if (req.type === 'SHIP_UPGRADE' || req.type === 'SHIP_EXPAND') {
+    const system = state.shipSystems.find((s) => s.id === req.payload.systemId)!
+    inventory = deduct(inventory, 'resource', req.type === 'SHIP_UPGRADE' ? upgradeCost(system.level) : expandCost(system.capacity))
+  } else if (req.type === 'SHIP_BUILD') {
+    inventory = deduct(inventory, 'part', BUILD_PART_COST)
+  } else if (req.type === 'RESEARCH') {
+    const def = TECHS.find((t) => t.slug === state.tech.find((r) => r.id === req.payload.techId)?.slug)!
+    inventory = deduct(inventory, def.costKind, def.costQty)
+  }
+
+  // Success: duration from the Task-1 formula, status from what the team is doing right now.
+  // A crew member is "free" when on no ACTIVE/PENDING task; after the checks above only a
+  // lead chaining behind its own ACTIVE can be non-free.
+  const free = (id: number) => !inStatus(id, 'ACTIVE') && !inStatus(id, 'PENDING')
+  const hops = req.type === 'JUMP' ? (req.payload.hops as number) : 0
+  const duration = computeDuration(req.type, hops, lead, helpers)
+  const status: TaskStatus = [lead, ...helpers].every((c) => free(c.id)) ? 'ACTIVE' : 'PENDING'
+
+  return {
+    task: {
+      type: req.type,
+      payload: JSON.stringify(req.payload),
+      leadCrewId: req.leadCrewId,
+      helpers: req.helperCrewIds,
+      duration,
+      remaining: duration,
+      status,
+      queuedAtTurn: state.turn, // queueing is free — the turn advances only on the tick
+    },
+    inventory,
+  }
+}
+
+// Pure version of spendItems' consumption (lib/game/ship.ts): the total is checked up front
+// (shortfall → the same 422 spendItems throws), then the oldest rows first (array order = id
+// order); rows that hit zero are dropped. The input array is never mutated.
+function deduct(items: InventoryItemDto[], kind: 'resource' | 'part', amount: number): InventoryItemDto[] {
+  if (totalQty(items, kind) < amount) {
+    throw new TaskError(422, `Insufficient ${kind === 'resource' ? 'resources' : 'parts'} in the cargo hold — need ${amount}`)
+  }
+  let remaining = amount
+  const out: InventoryItemDto[] = []
+  for (const item of items) {
+    if (item.kind !== kind) {
+      out.push(item)
+      continue
+    }
+    const take = Math.min(item.qty, remaining)
+    remaining -= take
+    if (take < item.qty) out.push({ ...item, qty: item.qty - take })
+  }
+  return out
+}
+
+// --- The turn tick: decrement, resolve, FIFO auto-start (pure — no DB) -------------------
+//
+// tickTurn is the whole §3 tick over the same plain QueueState queueTask consumes. It owns
+// the turn increment and nothing else: it applies no effect and runs no mission logic —
+// the save.ts orchestrator (runTurn) calls the 4a resolvers for the returned `completed`
+// tasks, in the order returned.
+export interface TickResult {
+  turn: number // state.turn + 1 — the tick IS the turn increment
+  tasks: Task[] // every task, updated: ACTIVE decremented, finished → DONE, started PENDING → ACTIVE
+  completed: Task[] // the tasks that hit 0 this tick, in resolution order
+}
+
+const byQueueOrder = (a: Task, b: Task) => a.queuedAtTurn - b.queuedAtTurn || a.id - b.id
+
+export function tickTurn(state: QueueState): TickResult {
+  const turn = state.turn + 1
+  const tasks = state.tasks.map((t) => ({ ...t })) // never mutate the input (house style — deduct)
+
+  // (a) every ACTIVE task ages by one; PENDING/DONE rows do not age.
+  for (const t of tasks) if (t.status === 'ACTIVE') t.remaining -= 1
+
+  // (b) everything that hit 0 resolves this tick. Marking DONE frees the whole team
+  // (busyness is derived from the tasks table — there is no crew status column to update).
+  // <= 0, not === 0: a corrupt row at or below zero still completes on the next tick
+  // instead of dead-ending the queue (spec focus 4: no dead ends).
+  const completed = tasks
+    .filter((t) => t.status === 'ACTIVE' && t.remaining <= 0)
+    .sort(byQueueOrder)
+  for (const t of completed) t.status = 'DONE'
+
+  // (c) auto-start: ONE forward pass over PENDING in (queuedAtTurn ASC, id ASC). A task starts
+  // (PENDING → ACTIVE, remaining unchanged — it keeps its full duration; its first decrement
+  // lands on the next tick) when its FULL team (lead + all helpers) is free: no member on an
+  // ACTIVE task, and no member committed to an EARLIER (queuedAtTurn, id) PENDING that is still
+  // pending. A member on a LATER PENDING does not block — this task has first claim, and once
+  // started it holds that member via the ACTIVE clause, blocking the later PENDING in the same
+  // pass. Under queueTask's invariants (one PENDING per member) the PENDING clause only bites
+  // on admin-corrupted rows, where it keeps the pass deterministic: of a contested member's
+  // PENDINGs the earliest (queuedAtTurn, id) always gets first claim, so at most ONE of their
+  // PENDINGs starts per tick (the FIFO chain of spec §3), and no PENDING starves behind a peer.
+  // A start only makes its team busier — never frees anyone — so a task that cannot start at
+  // its position cannot start later in the same pass: one pass is complete.
+  for (const t of tasks.filter((t) => t.status === 'PENDING').sort(byQueueOrder)) {
+    const free = (id: number) =>
+      !tasks.some((o) => o.status === 'ACTIVE' && (o.leadCrewId === id || o.helpers.includes(id))) &&
+      !tasks.some((o) => o.status === 'PENDING' && o.id !== t.id && byQueueOrder(o, t) < 0 && (o.leadCrewId === id || o.helpers.includes(id)))
+    if ([t.leadCrewId, ...t.helpers].every(free)) t.status = 'ACTIVE'
+  }
+
+  return { turn, tasks, completed }
+}

lib/game/tech.ts

@@ -0,0 +1,104 @@
+// Pure technology model: the known techs, their costs/prerequisites and what each unlock does.
+// No DB imports — both lib/game/research.ts + lib/game/ship.ts (server) and the frontend import
+// from here so research/cap/gate logic can never drift from what the API enforces.
+
+import { MAX_CAPACITY, MAX_LEVEL } from './ship-costs'
+
+export interface TechDef {
+  slug: string // stable key used in DB + prerequisites
+  name: string // display name
+  costKind: 'resource' | 'part'
+  costQty: number
+  prereqs: string[] // slugs that must be researched first (short chains only)
+  effect: string // effect slug — see EFFECTS below
+}
+
+// The technology tree, in display order. Roots have no prerequisites; the two chains are
+// WEAPONS SYSTEMS → PLASMA CANNON and REACTOR OVERCLOCK → FUSION CORE. Costs stay small so a
+// handful of scans makes something affordable (the e2e scan loop relies on that).
+export const TECHS: TechDef[] = [
+  { slug: 'WEAPONS_SYSTEMS', name: 'WEAPONS SYSTEMS', costKind: 'part', costQty: 2, prereqs: [], effect: 'BUILD_WEAPONS' },
+  { slug: 'REACTOR_OVERCLOCK', name: 'REACTOR OVERCLOCK', costKind: 'resource', costQty: 3, prereqs: [], effect: 'REACTOR_LEVEL_CAP' },
+  { slug: 'HULL_PLATING', name: 'HULL PLATING', costKind: 'resource', costQty: 3, prereqs: [], effect: 'HULL_CAPACITY_CAP' },
+  { slug: 'NAV_AI', name: 'NAVIGATION AI', costKind: 'resource', costQty: 2, prereqs: [], effect: 'NAV_LEVEL_CAP' },
+  { slug: 'PLASMA_CANNON', name: 'PLASMA CANNON', costKind: 'part', costQty: 3, prereqs: ['WEAPONS_SYSTEMS'], effect: 'WEAPONS_LEVEL_CAP' },
+  { slug: 'FUSION_CORE', name: 'FUSION CORE', costKind: 'resource', costQty: 4, prereqs: ['REACTOR_OVERCLOCK'], effect: 'REACTOR_CAPACITY_CAP' },
+]
+
+// What each researched tech changes on the ship. `unlock_build` gates a BUILD action; the cap
+// effects raise the UPGRADE/EXPAND ceiling for one system type (stacked over the base caps).
+export interface TechEffect {
+  kind: 'unlock_build' | 'raise_level_cap' | 'raise_capacity_cap'
+  shipType: string
+  bonus?: number // cap effects only
+}
+
+export const EFFECTS: Record<string, TechEffect & { description: string }> = {
+  BUILD_WEAPONS: { kind: 'unlock_build', shipType: 'WEAPONS', description: 'Unlocks building the WEAPONS system' },
+  REACTOR_LEVEL_CAP: { kind: 'raise_level_cap', shipType: 'REACTOR', bonus: 2, description: `Raises REACTOR max level by 2 (${MAX_LEVEL} → ${MAX_LEVEL + 2})` },
+  HULL_CAPACITY_CAP: { kind: 'raise_capacity_cap', shipType: 'HULL', bonus: 3, description: `Raises HULL max capacity by 3 (${MAX_CAPACITY} → ${MAX_CAPACITY + 3})` },
+  // #35 — the researched state of this tech also extends the jump range to 2 hops (enforced in
+  // lib/game/save.ts, which keys off the NAV_AI slug); the description is what the SKILL TREE card shows.
+  NAV_LEVEL_CAP: { kind: 'raise_level_cap', shipType: 'NAV COMPUTER', bonus: 2, description: `Raises NAV COMPUTER max level by 2 (${MAX_LEVEL} → ${MAX_LEVEL + 2}) and enables multi-system jumps (up to 2 hops in one action)` },
+  WEAPONS_LEVEL_CAP: { kind: 'raise_level_cap', shipType: 'WEAPONS', bonus: 2, description: `Raises WEAPONS max level by 2 (once built)` },
+  REACTOR_CAPACITY_CAP: { kind: 'raise_capacity_cap', shipType: 'REACTOR', bonus: 3, description: `Raises REACTOR max capacity by 3 (${MAX_CAPACITY} → ${MAX_CAPACITY + 3})` },
+}
+
+export type TechStateName = 'RESEARCHED' | 'AVAILABLE' | 'LOCKED'
+
+// One tech as served to the UI (GET /api/tech) and consumed by both tabs.
+export interface TechDto {
+  id: number
+  slug: string
+  name: string
+  costKind: 'resource' | 'part'
+  costQty: number
+  prereqs: string[] // prerequisite NAMES (for display), in TECHS order
+  effect: string // human-readable unlock description
+  state: TechStateName
+  missingPrereqs: string[] // unmet prerequisite names — non-empty only when LOCKED
+}
+
+export function techBySlug(slug: string): TechDef | undefined {
+  return TECHS.find((t) => t.slug === slug)
+}
+
+// RESEARCHED if done, AVAILABLE if all prerequisites are researched, LOCKED otherwise (with the
+// missing prerequisite names so the UI can say which one is blocking it).
+export function techStatus(def: TechDef, researchedSlugs: Set<string>): { state: TechStateName; missingPrereqs: string[] } {
+  if (researchedSlugs.has(def.slug)) return { state: 'RESEARCHED', missingPrereqs: [] }
+  const missing = def.prereqs.filter((p) => !researchedSlugs.has(p)).map((slug) => techBySlug(slug)?.name ?? slug)
+  return missing.length === 0 ? { state: 'AVAILABLE', missingPrereqs: [] } : { state: 'LOCKED', missingPrereqs: missing }
+}
+
+// The UPGRADE ceiling for a system type given what is researched (base cap + bonuses).
+export function effectiveLevelCap(shipType: string, researchedSlugs: Set<string>): number {
+  let cap = MAX_LEVEL
+  for (const def of TECHS) {
+    if (!researchedSlugs.has(def.slug)) continue
+    const effect = EFFECTS[def.effect]
+    if (effect?.kind === 'raise_level_cap' && effect.shipType === shipType) cap += effect.bonus ?? 0
+  }
+  return cap
+}
+
+// The EXPAND ceiling for a system type given what is researched.
+export function effectiveCapacityCap(shipType: string, researchedSlugs: Set<string>): number {
+  let cap = MAX_CAPACITY
+  for (const def of TECHS) {
+    if (!researchedSlugs.has(def.slug)) continue
+    const effect = EFFECTS[def.effect]
+    if (effect?.kind === 'raise_capacity_cap' && effect.shipType === shipType) cap += effect.bonus ?? 0
+  }
+  return cap
+}
+
+// The name of the tech that must be researched before a system type can be BUILT, or null when
+// building it is not gated (or the gate is already researched).
+export function buildGate(shipType: string, researchedSlugs: Set<string>): string | null {
+  for (const def of TECHS) {
+    const effect = EFFECTS[def.effect]
+    if (effect?.kind === 'unlock_build' && effect.shipType === shipType && !researchedSlugs.has(def.slug)) return def.name
+  }
+  return null
+}

lib/game/test-fixtures.ts

@@ -0,0 +1,80 @@
+// Shared fixture suite for the game tests (save.test.ts, the 5a route tests, and the later
+// ship/research route tests): one deterministic world — seed '42', save stamped at the
+// current schema version so no backfill runs — plus the crew and task-row minters the
+// queueing tests use. Ids line up across worlds built in fresh files (same insert order),
+// so two fixture worlds are comparable row for row.
+import type { GameDb } from '@/lib/db/client'
+import * as schema from '@/lib/db/schema'
+import { SCHEMA_VERSION } from './save'
+
+// Fixed so a fixture's event rows carry a stable created_at (tests never assert on it, but
+// a wall-clock Date would make two fixture worlds differ byte-for-byte).
+export const T0 = '2026-10-01T00:00:00.000Z'
+
+// Origin (s0, id 1, current) — Outpost (s1, one hop: the jump target) — Farpoint (s2, two
+// hops: beyond one-hop range, so the unreachable pre-check has a target to 409 on; with
+// NAVIGATION AI researched it would be reachable). p0 'Alder' in s0, p1 'Basalt' in s1.
+// No crew, tasks, ship, or tech rows — the caller mints exactly what a test needs.
+export async function buildWorldFixture(
+  db: GameDb,
+  outpostDiscovered = false,
+): Promise<{ sys1: number; p0: number; p1: number; farSystem: number }> {
+  const [save] = await db.db
+    .insert(schema.saves)
+    .values({ seed: '42', turn: 0, createdAt: T0, schemaVersion: SCHEMA_VERSION })
+    .returning()
+  const [s0] = await db.db
+    .insert(schema.solarSystems)
+    .values({ saveId: save.id, name: 'Origin', x: 50, y: 50, discovered: true, isCurrent: true })
+    .returning({ id: schema.solarSystems.id })
+  const [s1] = await db.db
+    .insert(schema.solarSystems)
+    .values({ saveId: save.id, name: 'Outpost', x: 55, y: 50, discovered: outpostDiscovered })
+    .returning({ id: schema.solarSystems.id })
+  const [s2] = await db.db
+    .insert(schema.solarSystems)
+    .values({ saveId: save.id, name: 'Farpoint', x: 60, y: 50, discovered: false })
+    .returning({ id: schema.solarSystems.id })
+  await db.db.insert(schema.jumpRoutes).values({ fromSystem: s0.id, toSystem: s1.id })
+  await db.db.insert(schema.jumpRoutes).values({ fromSystem: s1.id, toSystem: s0.id })
+  await db.db.insert(schema.jumpRoutes).values({ fromSystem: s1.id, toSystem: s2.id })
+  await db.db.insert(schema.jumpRoutes).values({ fromSystem: s2.id, toSystem: s1.id })
+  const [p0] = await db.db
+    .insert(schema.planets)
+    .values({ systemId: s0.id, parentId: null, name: 'Alder', type: 'ROCKY', hazard: false })
+    .returning({ id: schema.planets.id })
+  const [p1] = await db.db
+    .insert(schema.planets)
+    .values({ systemId: s1.id, parentId: null, name: 'Basalt', type: 'GAS', hazard: false })
+    .returning({ id: schema.planets.id })
+  return { sys1: s1.id, p0: p0.id, p1: p1.id, farSystem: s2.id }
+}
+
+// `count` identical crew members, in insertion order — the queueing tests need real crew
+// ids to lead and help with.
+export async function addCrew(db: GameDb, count: number): Promise<number[]> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const ids: number[] = []
+  for (let i = 0; i < count; i++) {
+    const [row] = await db.db
+      .insert(schema.crew)
+      .values({ saveId: save.id, name: `CREW ${i + 1}`, role: 'PILOT', traitGood: 'QUICK HANDS', traitBad: 'OVERCAUTIOUS', origin: 'STARTING CREW' })
+      .returning({ id: schema.crew.id })
+    ids.push(row.id)
+  }
+  return ids
+}
+
+// Mint one tasks-table row with a chosen state — the queueing/tick tests seed the queue
+// directly instead of going through the routes (which would run the same validation).
+export async function insertTaskRow(
+  db: GameDb,
+  over: { type: string; payload: object; leadCrewId: number; helpers: number[]; duration: number; remaining: number; status: string; queuedAtTurn: number },
+): Promise<number> {
+  const [save] = await db.db.select().from(schema.saves).limit(1)
+  const [row] = await db.db
+    .insert(schema.tasks)
+    .values({ saveId: save.id, type: over.type, payload: JSON.stringify(over.payload), leadCrewId: over.leadCrewId, helpers: JSON.stringify(over.helpers), duration: over.duration, remaining: over.remaining, status: over.status, queuedAtTurn: over.queuedAtTurn })
+    .returning({ id: schema.tasks.id })
+  return row.id
+}

lib/game/world.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { bodyRng, explorationRng, generatePlanets, generateRing, generateStartRegion, makeName, mulberry32, rollExploration } from './world'
+import { bodyRng, explorationRng, generatePlanets, generateRing, generateStartRegion, makeName, mulberry32, reachableWithin, rollExploration } from './world'
 
 describe('generateStartRegion', () => {
   const region = generateStartRegion(mulberry32(42))
@@ -76,6 +76,19 @@ describe('generateRing (expansion)', () => {
     for (let i = 0; i < 40; i++) makeName(rng, taken)
     expect(taken.size).toBe(40)
   })
+
+  it('terminates with numbered variants once all 128 base names are taken', () => {
+    const rng = mulberry32(9)
+    const taken = new Set<string>()
+    for (let i = 0; i < 128; i++) makeName(rng, taken) // exhaust the whole pool
+    expect(taken.size).toBe(128)
+
+    const a = makeName(rng, taken) // must return instead of spinning forever
+    const b = makeName(rng, taken)
+    expect(a).not.toBe(b)
+    expect(taken.has(a)).toBe(true)
+    expect(taken.has(b)).toBe(true)
+  })
 })
 
 describe('generatePlanets', () => {
@@ -132,3 +145,37 @@ describe('rollExploration', () => {
     expect(shapes).toEqual(new Set(['rp', 'r-', '-p', '--']))
   })
 })
+
+describe('reachableWithin (#35 jump range)', () => {
+  // Chain 1—2—3—4 with a branch off 2: 2—5. Distances from 1: 2→1, 3/5→2, 4→3.
+  const edges: [number, number][] = [[1, 2], [2, 3], [3, 4], [2, 5]]
+
+  it('maxHops=1 returns only direct neighbours at distance 1 (the pre-NAV-AI range)', () => {
+    expect(reachableWithin(edges, 1, 1)).toEqual(new Map([[2, 1]]))
+  })
+
+  it('maxHops=2 adds the two-hop systems and stops before three', () => {
+    expect(reachableWithin(edges, 1, 2)).toEqual(new Map([ [2, 1], [3, 2], [5, 2] ]))
+  })
+
+  it('larger maxHops keeps walking until the graph is exhausted', () => {
+    expect(reachableWithin(edges, 1, 5)).toEqual(new Map([ [2, 1], [3, 2], [5, 2], [4, 3] ]))
+  })
+
+  it('never includes the origin and handles empty/isolated input', () => {
+    expect(reachableWithin(edges, 1, 3).has(1)).toBe(false)
+    expect(reachableWithin([], 1, 2)).toEqual(new Map())
+    expect(reachableWithin([[9, 10]], 1, 2)).toEqual(new Map())
+  })
+
+  it('accepts double-directed route rows (the save.ts input shape) identically', () => {
+    const directed: [number, number][] = [[1, 2], [2, 1], [2, 3], [3, 2]]
+    expect(reachableWithin(directed, 1, 2)).toEqual(new Map([ [2, 1], [3, 2] ]))
+  })
+
+  it('on a fresh start region every system is one hop away — two-hop targets only exist after an expansion', () => {
+    const region = generateStartRegion(mulberry32(42)) // edges index into [start, ...neighbors], start = 0
+    expect(reachableWithin(region.edges, 0, 1).size).toBe(region.neighbors.length)
+    expect(reachableWithin(region.edges, 0, 2).size).toBe(region.neighbors.length)
+  })
+})

lib/game/world.ts

@@ -3,7 +3,7 @@
 
 export interface WorldSystem {
   name: string
-  x: number // 0–100 coordinate space, rendered directly by NodeGraph
+  x: number // 0–100 coordinate space; seeds the force-directed WORLD MAP layout
   y: number
 }
 
@@ -36,13 +36,25 @@ function title(word: string): string {
   return word.charAt(0) + word.slice(1).toLowerCase()
 }
 
-// Picks a name not in `taken` and adds it, so callers can't accidentally reuse one.
+// Picks a name not in `taken` and adds it, so callers can't accidentally reuse one. The base
+// pool is finite (16×8=128), so once every base is taken the loop would spin forever — which
+// froze the whole server on a save that had grown past 128 systems (synchronous sql.js runs on
+// Node's single thread). Numbered variants keep names unique and terminate.
 export function makeName(rng: () => number, taken: Set<string>): string {
   for (;;) {
-    const name = `${title(FIRST[Math.floor(rng() * FIRST.length)])} ${title(SECOND[Math.floor(rng() * SECOND.length)])}`
-    if (!taken.has(name)) {
-      taken.add(name)
-      return name
+    const base = `${title(FIRST[Math.floor(rng() * FIRST.length)])} ${title(SECOND[Math.floor(rng() * SECOND.length)])}`
+    if (!taken.has(base)) {
+      taken.add(base)
+      return base
+    }
+    if (taken.size >= FIRST.length * SECOND.length) {
+      for (let n = 2; ; n++) {
+        const name = `${base} ${n}`
+        if (!taken.has(name)) {
+          taken.add(name)
+          return name
+        }
+      }
     }
   }
 }
@@ -124,6 +136,36 @@ export function generateRing(
   return { systems, edges: ringEdges(systems.length) }
 }
 
+// BFS over jump routes: every system within maxHops of fromId, mapped to its shortest hop count.
+// `edges` may be undirected pairs (WorldState.edges) or double-directed route rows — duplicates are
+// harmless because a visited system is never re-queued. fromId itself is not in the result.
+export function reachableWithin(edges: [number, number][], fromId: number, maxHops: number): Map<number, number> {
+  const adj = new Map<number, number[]>()
+  for (const [a, b] of edges) {
+    if (!adj.has(a)) adj.set(a, [])
+    if (!adj.has(b)) adj.set(b, [])
+    adj.get(a)!.push(b)
+    adj.get(b)!.push(a)
+  }
+  const dist = new Map<number, number>()
+  const seen = new Set([fromId]) // the origin is never re-queued or reported
+  let frontier = [fromId]
+  for (let hop = 1; hop <= maxHops; hop++) {
+    const next: number[] = []
+    for (const id of frontier) {
+      for (const nb of adj.get(id) ?? []) {
+        if (!seen.has(nb)) {
+          seen.add(nb)
+          dist.set(nb, hop)
+          next.push(nb)
+        }
+      }
+    }
+    frontier = next
+  }
+  return dist
+}
+
 // --- Bodies (planets + moons) and exploration -------------------------------
 
 export interface WorldMoon {

lib/openapi.test.ts

@@ -5,18 +5,155 @@ import { openApiSpec } from './openapi';
 describe('OpenAPI spec', () => {
   it('documents every public endpoint', () => {
     expect(Object.keys(openApiSpec.paths).sort()).toEqual([
+      '/api/admin/tables',
+      '/api/admin/tables/{name}/rows',
+      '/api/crew',
+      '/api/events',
       '/api/explore',
       '/api/jump',
+      '/api/missions',
+      '/api/missions/{id}/accept',
+      '/api/research',
+      '/api/ship',
+      '/api/ship/build',
+      '/api/ship/expand',
+      '/api/ship/upgrade',
       '/api/system',
+      '/api/tech',
+      '/api/turn',
       '/api/version',
       '/api/world',
     ]);
   });
 
+  it('describes the ship endpoints as ShipState in and out, with error responses on the actions', () => {
+    const ship = openApiSpec.paths['/api/ship'].get.responses[200].content['application/json'].schema;
+    expect(ship.$ref).toBe('#/components/schemas/ShipState');
+
+    const system = openApiSpec.components.schemas.ShipSystem.properties;
+    expect(Object.keys(system)).toEqual(['id', 'type', 'level', 'capacity', 'built']);
+
+    for (const [path, request] of [
+      ['/api/ship/upgrade', '#/components/schemas/UpgradeRequest'],
+      ['/api/ship/expand', '#/components/schemas/ExpandRequest'],
+      ['/api/ship/build', '#/components/schemas/BuildRequest'],
+    ] as const) {
+      const post = openApiSpec.paths[path].post;
+      expect(post.requestBody.content['application/json'].schema.$ref).toBe(request);
+      expect(post.responses[200].content['application/json'].schema.$ref).toBe('#/components/schemas/ShipState');
+      for (const status of ['400', '404', '409', '422'] as const) {
+        expect(post.responses[status].content['application/json'].schema.$ref).toBe('#/components/schemas/Error');
+      }
+    }
+
+    // The queued-ship-work requests: the action target plus the crew team (lead required,
+    // helpers optional) — the same team fields as JumpRequest / ExploreRequest.
+    const upgradeReq = openApiSpec.components.schemas.UpgradeRequest as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(upgradeReq.properties)).toEqual(['systemId', 'leadCrewId', 'helperCrewIds']);
+    expect(upgradeReq.required).toEqual(['systemId', 'leadCrewId']);
+    expect((upgradeReq.properties.helperCrewIds as { items: { type: string } }).items.type).toBe('integer');
+
+    const expandReq = openApiSpec.components.schemas.ExpandRequest as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(expandReq.properties)).toEqual(['systemId', 'leadCrewId', 'helperCrewIds']);
+    expect(expandReq.required).toEqual(['systemId', 'leadCrewId']);
+    expect((expandReq.properties.helperCrewIds as { items: { type: string } }).items.type).toBe('integer');
+
+    const buildReq = openApiSpec.components.schemas.BuildRequest as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(buildReq.properties)).toEqual(['type', 'leadCrewId', 'helperCrewIds']);
+    expect(buildReq.required).toEqual(['type', 'leadCrewId']);
+    expect((buildReq.properties.helperCrewIds as { items: { type: string } }).items.type).toBe('integer');
+  });
+
+  it('describes the tech endpoints: GET /api/tech → Tech[], POST /api/research with error responses', () => {
+    const tech = openApiSpec.paths['/api/tech'].get.responses[200].content['application/json'].schema;
+    expect(tech.type).toBe('array');
+    expect((tech.items as { $ref: string }).$ref).toBe('#/components/schemas/Tech');
+
+    const techProps = openApiSpec.components.schemas.Tech.properties;
+    expect(Object.keys(techProps)).toEqual(['id', 'slug', 'name', 'costKind', 'costQty', 'prereqs', 'effect', 'state', 'missingPrereqs']);
+    expect((techProps.state as { enum: string[] }).enum).toEqual(['RESEARCHED', 'AVAILABLE', 'LOCKED']);
+
+    const post = openApiSpec.paths['/api/research'].post;
+    expect(post.requestBody.content['application/json'].schema.$ref).toBe('#/components/schemas/ResearchRequest');
+    expect(post.responses[200].content['application/json'].schema.items.$ref).toBe('#/components/schemas/Tech');
+    for (const status of ['400', '404', '409', '422'] as const) {
+      expect(post.responses[status].content['application/json'].schema.$ref).toBe('#/components/schemas/Error');
+    }
+
+    // The queued-research request: the tech target plus the crew team (lead required, helpers optional).
+    const researchReq = openApiSpec.components.schemas.ResearchRequest as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(researchReq.properties)).toEqual(['techId', 'leadCrewId', 'helperCrewIds']);
+    expect(researchReq.required).toEqual(['techId', 'leadCrewId']);
+    expect((researchReq.properties.helperCrewIds as { items: { type: string } }).items.type).toBe('integer');
+  });
+
+  it('describes the mission endpoints: GET /api/missions → Mission[], POST accept with error responses', () => {
+    const missions = openApiSpec.paths['/api/missions'].get.responses[200].content['application/json'].schema;
+    expect(missions.type).toBe('array');
+    expect((missions.items as { $ref: string }).$ref).toBe('#/components/schemas/Mission');
+
+    const props = openApiSpec.components.schemas.Mission.properties;
+    expect(Object.keys(props)).toEqual(['id', 'type', 'description', 'targetSystemId', 'conditionKind', 'progressTarget', 'progress', 'rewardKind', 'rewardQty', 'state']);
+    expect((props.type as { enum: string[] }).enum).toEqual(['DELIVER', 'EXPLORE', 'FIND']);
+    expect((props.state as { enum: string[] }).enum).toEqual(['AVAILABLE', 'ACTIVE', 'DONE']);
+
+    const post = openApiSpec.paths['/api/missions/{id}/accept'].post;
+    expect(post.responses[200].content['application/json'].schema.items.$ref).toBe('#/components/schemas/Mission');
+    for (const status of ['400', '404', '409'] as const) {
+      expect(post.responses[status].content['application/json'].schema.$ref).toBe('#/components/schemas/Error');
+    }
+  });
+
+  it('describes GET /api/events → Event[] with a limit query param and a 400 error response', () => {
+    const events = openApiSpec.paths['/api/events'].get.responses[200].content['application/json'].schema;
+    expect(events.type).toBe('array');
+    expect((events.items as { $ref: string }).$ref).toBe('#/components/schemas/Event');
+
+    const props = openApiSpec.components.schemas.Event.properties;
+    expect(Object.keys(props)).toEqual(['id', 'turn', 'type', 'message', 'createdAt']);
+    expect((props.type as { enum: string[] }).enum).toEqual(['new_game', 'jump', 'explore', 'research', 'upgrade', 'expand', 'build', 'mission']);
+
+    const get = openApiSpec.paths['/api/events'].get;
+    const limit = (get.parameters ?? []).find((p) => p.name === 'limit');
+    expect(limit?.in).toBe('query');
+    expect(limit?.required).toBe(false);
+    expect(get.responses['400'].content['application/json'].schema.$ref).toBe('#/components/schemas/Error');
+  });
+
+  it('describes /api/crew as the CrewState { crew, tasks } object and crewFound on ExploreResult', () => {
+    const crew = openApiSpec.paths['/api/crew'].get.responses[200].content['application/json'].schema;
+    expect(crew.$ref).toBe('#/components/schemas/CrewState');
+
+    const crewState = openApiSpec.components.schemas.CrewState as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(crewState.properties)).toEqual(['crew', 'tasks']);
+    expect(crewState.required).toEqual(['crew', 'tasks']);
+    expect((crewState.properties.crew as { items: { $ref: string } }).items.$ref).toBe('#/components/schemas/CrewMember');
+    expect((crewState.properties.tasks as { items: { $ref: string } }).items.$ref).toBe('#/components/schemas/TaskDto');
+
+    const taskDto = openApiSpec.components.schemas.TaskDto as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(taskDto.properties)).toEqual(['id', 'type', 'targetLabel', 'leadName', 'helperNames', 'remaining', 'status', 'leadCrewId', 'helperCrewIds']);
+    expect(taskDto.required).toEqual(['id', 'type', 'targetLabel', 'leadName', 'helperNames', 'remaining', 'status', 'leadCrewId', 'helperCrewIds']);
+    expect((taskDto.properties.type as { enum: string[] }).enum).toEqual(['JUMP', 'EXPLORE', 'SHIP_UPGRADE', 'SHIP_EXPAND', 'SHIP_BUILD', 'RESEARCH']);
+    expect((taskDto.properties.status as { enum: string[] }).enum).toEqual(['ACTIVE', 'PENDING']);
+    expect((taskDto.properties.helperCrewIds as { items: { type: string } }).items.type).toBe('integer');
+
+    const member = openApiSpec.components.schemas.CrewMember.properties;
+    expect(Object.keys(member)).toEqual(['id', 'name', 'role', 'trait_good', 'trait_bad', 'origin']);
+
+    const exploreResult = openApiSpec.components.schemas.ExploreResult as { allOf: unknown[] };
+    const extra = (exploreResult.allOf[1] as { properties: Record<string, unknown> }).properties;
+    expect(Object.keys(extra)).toEqual(['outcome', 'crewFound']);
+  });
+
   it('describes the system endpoints as SystemState in and out', () => {
     const system = openApiSpec.paths['/api/system'].get.responses[200].content['application/json'].schema;
     expect(system.$ref).toBe('#/components/schemas/SystemState');
 
+    // The snapshot carries the active + pending task queue.
+    const systemState = openApiSpec.components.schemas.SystemState as { properties: Record<string, unknown>; required: string[] };
+    expect(systemState.required).toEqual(['systemId', 'systemName', 'planets', 'inventory', 'turn', 'tasks']);
+    expect((systemState.properties.tasks as { items: { $ref: string } }).items.$ref).toBe('#/components/schemas/TaskDto');
+
     const explore = openApiSpec.paths['/api/explore'].post;
     expect(explore.requestBody.content['application/json'].schema.$ref).toBe('#/components/schemas/ExploreRequest');
     expect(explore.responses[200].content['application/json'].schema.$ref).toBe('#/components/schemas/ExploreResult');
@@ -26,18 +163,54 @@ describe('OpenAPI spec', () => {
     for (const status of ['400', '404', '409'] as const) {
       expect(explore.responses[status].content['application/json'].schema.$ref).toBe('#/components/schemas/Error');
     }
+
+    // The queued-scan request: the scan target plus the crew team (lead required, helpers optional).
+    const exploreReq = openApiSpec.components.schemas.ExploreRequest as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(exploreReq.properties)).toEqual(['planetId', 'leadCrewId', 'helperCrewIds']);
+    expect(exploreReq.required).toEqual(['planetId', 'leadCrewId']);
+    expect((exploreReq.properties.helperCrewIds as { items: { type: string } }).items.type).toBe('integer');
   });
 
   it('describes the world endpoints as WorldState in and out', () => {
     const world = openApiSpec.paths['/api/world'].get.responses[200].content['application/json'].schema;
     expect(world.$ref).toBe('#/components/schemas/WorldState');
 
+    // The snapshot carries the active + pending task queue.
+    const worldState = openApiSpec.components.schemas.WorldState as { properties: Record<string, unknown>; required: string[] };
+    expect(worldState.required).toEqual(['systems', 'edges', 'turn', 'tasks']);
+    expect((worldState.properties.tasks as { items: { $ref: string } }).items.$ref).toBe('#/components/schemas/TaskDto');
+
     const jump = openApiSpec.paths['/api/jump'].post;
     expect(jump.requestBody.content['application/json'].schema.$ref).toBe('#/components/schemas/JumpRequest');
     expect(jump.responses[200].content['application/json'].schema.$ref).toBe('#/components/schemas/WorldState');
     for (const status of ['400', '404', '409'] as const) {
       expect(jump.responses[status].content['application/json'].schema.$ref).toBe('#/components/schemas/Error');
     }
+
+    // The queued-jump request: the jump target plus the crew team (lead required, helpers optional).
+    const jumpReq = openApiSpec.components.schemas.JumpRequest as { properties: Record<string, unknown>; required: string[] };
+    expect(Object.keys(jumpReq.properties)).toEqual(['systemId', 'leadCrewId', 'helperCrewIds']);
+    expect(jumpReq.required).toEqual(['systemId', 'leadCrewId']);
+    expect((jumpReq.properties.helperCrewIds as { items: { type: string } }).items.type).toBe('integer');
+  });
+
+  it('describes the turn endpoint: POST /api/turn with no body → WorldState + tasks, 500 on internal error', () => {
+    const post = openApiSpec.paths['/api/turn'].post;
+    expect(post).not.toHaveProperty('requestBody');
+    expect(post.responses[200].content['application/json'].schema.$ref).toBe('#/components/schemas/TurnResult');
+    expect(post.responses[500].content['application/json'].schema.$ref).toBe('#/components/schemas/Error');
+
+    // TurnResult extends WorldState with the task queue after the tick.
+    const turnResult = openApiSpec.components.schemas.TurnResult as { allOf: unknown[] };
+    expect((turnResult.allOf[0] as { $ref: string }).$ref).toBe('#/components/schemas/WorldState');
+    const extra = (turnResult.allOf[1] as { properties: Record<string, unknown> }).properties;
+    expect(Object.keys(extra)).toEqual(['tasks']);
+
+    const props = openApiSpec.components.schemas.Task.properties;
+    expect(Object.keys(props)).toEqual(['id', 'saveId', 'type', 'payload', 'leadCrewId', 'helpers', 'duration', 'remaining', 'status', 'queuedAtTurn']);
+    expect((props.type as { enum: string[] }).enum).toEqual(['JUMP', 'EXPLORE', 'SHIP_UPGRADE', 'SHIP_EXPAND', 'SHIP_BUILD', 'RESEARCH']);
+    expect((props.status as { enum: string[] }).enum).toEqual(['ACTIVE', 'PENDING', 'DONE']);
+    expect((props.helpers as { items: { type: string } }).items.type).toBe('integer');
   });
 
   it('keeps info.version in sync with package.json', () => {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "space-wanderer",
-  "version": "0.4.0",
+  "version": "0.10.1",
   "private": true,
   "scripts": {
     "dev": "next dev -p 3000",
@@ -15,6 +15,9 @@
     "@radix-ui/react-tabs": "^1.1.13",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "d3-force": "^3.0.0",
+    "d3-selection": "^3.0.0",
+    "d3-zoom": "^3.0.0",
     "drizzle-orm": "^0.45.2",
     "next": "^16.3.5",
     "react": "^19.3.0",
@@ -25,11 +28,14 @@
   "devDependencies": {
     "@playwright/test": "1.63.0",
     "@tailwindcss/postcss": "^4.2.0",
-    "tailwindcss": "^4.2.0",
+    "@types/d3-force": "^3.0.10",
+    "@types/d3-selection": "^3.0.12",
+    "@types/d3-zoom": "^3.0.9",
     "@types/node": "^22.20.3",
     "@types/react": "^19.3.0",
     "@types/react-dom": "^19.3.0",
     "@types/sql.js": "^1.4.11",
+    "tailwindcss": "^4.2.0",
     "typescript": "^7.0.2",
     "vitest": "^5.0.1"
   }