Merge pull request 'Right pane width matches left pane: 280→360px + toast offset (ISS-046)' (#56) from ui/right-pane-width into master

Packages carry a real weightKg (unit weight x count with +/-30% jitter),
plane capacity becomes maxPayloadKg instead of 6 slots, load validation
sums cargo weight against the payload, and the payout gains a per-kg part.
Loadout display shows tonnage; OpenAPI swaps CatalogEntry.capacity for
maxPayloadKg and adds PackageState.weightKg.

CHANGELOG.md

@@ -1,5 +1,52 @@
 # Changelog
 
+## v0.27.1 — 2026-09-20 13:16
+- Right pane widened from 280px to 360px to match the left pane; toast stack offset adjusted to stay flush with the map's right edge (ISS-046).
+
+## v0.27.0 — 2026-09-20 12:27
+- **Packages now have real weight (ISS-045).** New `weight_kg REAL NOT NULL DEFAULT 2000` column on `packages` (`lib/db/schema.ts`, DDL + guarded `ALTER TABLE` migration in `lib/db/client.ts`; pre-existing rows backfill to the mid-range default). `generatePackage` draws it AFTER cargoCount: `UNIT_WEIGHT_KG[cargoType] × cargoCount × (0.7 + 0.6·rng())`, rounded to integer kg — one extra RNG draw per package, so the documented fixed draw order is now origin, dest, cargoType, cargoCount, weight jitter, [deadline window]. New tunable table `UNIT_WEIGHT_KG` in `lib/game/seed.ts` (Passengers 50 / Mail 60 / Perishables 70 / Electronics 40 / Auto parts 72 kg per passenger/pallet), chosen so every cargo type at MAX count × max jitter (1.3×) still fits the ATR alone and typical packages land ~400–2500 kg
+- **Plane capacity is now max payload kg, not 6 slots (ISS-045).** `capacity` REMOVED from `PlaneType`/`CatalogEntry`/snapshot catalog; replaced by `maxPayloadKg` — ATR 72-600 = 4800 kg (`lib/game/catalog.ts`). Server load validation (`loadPackage`, `lib/game/actions.ts`) now sums `weightKg` over the plane's loaded+expired packages and 409s with `no payload room: the ATR 72-600 carries X/Y kg` when the new package doesn't fit; expired cargo still occupies its payload. Client mirrors it: `slotsUsedFor` → `cargoWeightFor(state, planeId)` (summed kg) in `components/RightPane.tsx`, and `loadEligiblePlanes` compares used + package weight ≤ catalog maxPayloadKg so the Load button state always matches what the server accepts
+- **Payout now includes a per-kg part (ISS-045).** New `rewardFor(km, weightKg) = round(BASE_REWARD + REWARD_PER_KM·km + REWARD_PER_KG·weightKg)` with `REWARD_PER_KG = 0.5` (`lib/game/seed.ts`) — replaces the distance-only `rewardForDistanceKm`, which is deleted (no remaining callers). Typical hops stay in the ~€1–3k band
+- **Loadout display shows tonnage (ISS-045).** Left-pane fleet rows now render `X.Xt / Y.Yt` (used/max payload, one decimal) instead of `n/6 pkgs`; the on-board block filter switches to weight-based. No new endpoints — OpenAPI only gains `PackageState.weightKg` and swaps `CatalogEntry.capacity` → `maxPayloadKg`, so the e2e path list stays at twelve
+- **Test hook gains a forced weight (ISS-045).** `generatePackage` accepts an optional `weightKg` that skips the jitter RNG draw (same pattern as the v0.8.0 forced endpoints), and `POST /api/test/create-package` passes it through — so e2e flows that load several packages onto one plane stay under its payload deterministically instead of flaking on two heavy random draws (~13% would otherwise exceed 4800 kg). The hook is test-only (FLIGHT_TEST_HOOKS=1) and not part of the documented API, so the OpenAPI path list stays at twelve
+- Tests: unit — `lib/game/seed.test.ts` (reward expectations → new formula incl. per-kg part; new balance-constraint test asserting every seeded package is a positive integer kg ≤ starter maxPayloadKg; forced-weight block), `lib/game/actions.test.ts` (loadPackage fill loop now inserts weights summing past maxPayloadKg → `/no payload room/`; expired-still-occupies reworked weight-based), `components/right-pane.test.ts` (`cargoWeightFor` sums + partial-payload eligibility case; CATALOG fixture drops capacity, gains maxPayloadKg), `lib/openapi.test.ts` (exact key lists for PackageState + CatalogEntry). Type-compat only: catalog fixtures in `deriveEvents`/`mapData` tests and the e2e interfaces. E2E — `e2e/right-pane.spec.ts` asserts `maxPayloadKg === 4800`; `e2e/panes.spec.ts` loadout regex → `/^\d+\.\dt \/ \d+\.\dt$/`; snapshot key lists in `app/api/state/route.test.ts` + `e2e/state.spec.ts` gain `weightKg`; the two multi-load tests in `e2e/actions.spec.ts` pass forced weights. Fuel math untouched — the refuel-forFlight exact-liter mirrors stay as-is
+- Verified: `tsc --noEmit` clean; unit suite green locally (311, was 308); `npx playwright test --list` = 45 tests in 13 files (unchanged); e2e not run locally by design — CI verifies against an isolated stack
+
+## v0.26.0 — 2026-09-20 11:28
+- **Flight queue UI + map rendering (ISS-043, part 2).** Builds on the part-1 backend (`PlaneState.queue`, `POST /api/planes/{id}/queue` + `/queue/cancel`, auto-chain on landing) — no new endpoints, so the OpenAPI spec and its e2e path list are untouched
+- **Dotted queue line on the map (ISS-043).** New pure builder `queuedRoutesGeoJson(planes, airportsByIcao)` in `lib/mapData.ts`: one LineString per FLYING plane with a non-empty queue, chaining `dest → queue[0] → …` — ONLY the not-yet-started legs (the active leg stays in the solid `routes-legs` layer). Reuses `greatCircleArc`, same feature/properties shape as `routesGeoJson` (`{planeId}`); arcs concatenated with the shared joint point dropped once; a plane is skipped, never guessed, when its dest or any queued ICAO is missing from the airport index. New GeoJSON source + line layer in `components/Map.tsx` — id `queue-routes`, muted slate `#64748b`, width 3, dotted via `'line-dasharray': [0.1, 1.5]` (distinct from the solid amber active leg and the `[2,2]` yellow hover dash), added after `routes-legs` but before the hover layers so a hovered trace still draws on top; pushed each poll in `applyDynamicRef` alongside the solid legs
+- **Queue sub-section in the left pane's On board block (ISS-043).** Each on-board plane block now carries a "Queue" sub-section after its cargo rows: one row per queued leg (`queue-leg-{i}`) showing destination name + ICAO with a Cancel button (`queue-cancel-{i}` → `POST …/queue/cancel {index:i}`), plus an add control — airport `<select>` (`queue-add-dest`) + "Add to queue" button (`queue-add` → `POST …/queue {destIcao}`) reusing the pane's already-fetched `airportOptions` (no second `/api/airports` fetch); buttons disable on `actionsBusy`, add also disables until an airport is picked. The on-board block filter now ALSO includes planes with a non-empty queue, so a queued plane always shows its block even when grounded with nothing on board. Existing cargo-row testids/behavior (`onboard-package-*`, `fly-to-*`, `refuel-for-*`, `abandon-*`) unchanged
+- Tests: unit — `lib/mapData.test.ts` gains a `queuedRoutesGeoJson` block mirroring the `routesGeoJson` tests (grounded plane with queue → nothing; flying with empty queue → nothing; flying with a 2-leg queue → one feature starting at DEST, passing through each queued airport exactly at the arc joints, ending at the last queued ICAO, length `n_legs × SEGMENTS + 1`; missing dest or queued ICAO → skipped; multiple planes → only qualifying ones draw). E2E — new `e2e/queue.spec.ts` (serial): (1) queue display + cancel through the real UI — load a package at EDDF, start leg 1 via the fly-to button, freeze mid-flight, add a leg via `queue-add-dest`/`queue-add`, assert `queue-leg-0` appears with its destination, cancel it and assert it's gone; (2) dotted map line — flying plane with one queued leg: fit to both endpoints and assert some rendered `queue-routes` segment starts within EPS of DEST and some ends within EPS of the queued airport ACROSS per-tile segments (plain-object mapping in-page per ORCHESTRATOR §6), no segment starts at the hub (the active leg is NOT in this layer) and every feature carries `planeId: plane-starter`; (3) auto-chain end-to-end — full tank, package EDDF→LEMD + queued return LEMD→EDDF, start leg 1, fast-forward at 1000× and assert the server AUTO-STARTS the chained leg (`status 'flying'` to EDDF with no manual dispatch) with the package already delivered (part-1 ordering: delivery before chaining); all three leave the starter grounded at EDDF for later specs
+- Verified: `tsc --noEmit` clean; unit suite green locally (308, was 303); `npx playwright test --list` = 45 tests in 13 files (was 42/12 — the new queue spec); e2e not run locally by design — CI verifies against an isolated stack
+
+## v0.25.0 — 2026-09-20 10:36
+- **Planes now hold a queue of upcoming flight legs (ISS-043, part 1 — backend).** One new column on `planes`: `queue TEXT NOT NULL DEFAULT '[]'` (`lib/db/schema.ts`, DDL + guarded `ALTER TABLE` migration in `lib/db/client.ts`) storing an ordered JSON array of ICAO strings = the legs NOT yet started. The active leg stays exactly as before (`destIcao` + `departureSimTime`); full path = `[locationIcao, destIcao, ...queue]`. No new table — queues are short, per-plane, always read/written whole
+- **Auto-chain on landing (ISS-043).** In `deliverPackages()` (`lib/sim/engine.ts`) a plane that arrives now reads its queue: if it holds legs AND fuel covers the first one (same `requiredFuelFor` feasibility rule as `/fly`), it immediately starts that leg from the arrival airport — stays `'flying'`, `departureSimTime` = the arrival instant, queue shortened. If fuel is short it grounds safely with the remaining queue kept intact for refuel + re-dispatch; an empty queue grounds exactly as before. Cargo delivery for the reached airport runs first and is unaffected by chaining. Ordering preserved on purpose: delivery runs BEFORE tickOnce's pause check (ISS-041), so a chained plane counts as still flying there — chaining never triggers the last-plane pause
+- **New endpoints (ISS-043).** `POST /api/planes/{planeId}/queue` body `{destIcao}` appends a not-yet-started leg (works grounded or flying — pre-build a route; nothing auto-starts, 400 unknown ICAO/bad body, 404 unknown plane); `POST /api/planes/{planeId}/queue/cancel` body `{index}` removes a queued leg by index (only queued legs are cancellable — the active in-flight leg is never touched; 400 non-integer/out-of-range index, 404 unknown plane). Both run through `performAction()` like every other action and return the full state snapshot. New actions `queueLeg`/`cancelQueuedLeg` in `lib/game/actions.ts`; routes under `app/api/planes/[planeId]/queue/`
+- **Snapshot + spec (ISS-043).** `PlaneState.queue: string[]` added to the `/api/state` snapshot (`lib/game/state.ts`, parsed with a null/malformed-safe helper shared by the engine); OpenAPI updated — `PlaneState.queue`, `QueueLegRequest`, `CancelQueuedLegRequest`, both new paths (200→snapshot, 400, 404)
+- Tests: unit — `lib/sim/engine.test.ts`: auto-chain block in `deliverPackages` (lands with queue + enough fuel → `'flying'` to the next dest at the arrival instant with the queue shortened; lands short on fuel → grounds with the queue intact; empty queue → unchanged grounding) plus a pause-on-landing regression guard — a chained plane does NOT trigger the last-plane pause. `lib/game/actions.test.ts`: `queueLeg` (appends in order, works while flying without touching the active leg, 404 unknown plane, 400 unknown ICAO) and `cancelQueuedLeg` (removes the right index keeping order, 400 out-of-range/negative/empty-queue, 404 unknown plane). `lib/openapi.test.ts`: endpoint count ten → twelve, PlaneState keys + both request schemas. Type-compat only: `queue: []` added to the `PlaneState`/seed fixtures in `deriveEvents`, `right-pane`, `mapData`, `seed` tests
+- Part 1 of ISS-043 (backend) — UI/map rendering of queued legs lands in a follow-up part. Verified: `tsc --noEmit` clean; unit suite green locally; `npx playwright test --list` unchanged at 42 tests in 12 files; e2e not run locally by design — CI verifies against an isolated stack
+
+## v0.24.0 — 2026-09-20 09:48
+- **Landing now pauses the sim instead of auto-slowing to 1× (ISS-041).** When the LAST plane in flight lands, `tickOnce` (`lib/sim/engine.ts`) sets `sim_state.paused = true` WITHOUT touching `timeScale` — speed is preserved. The trigger condition carries over from ISS-011's auto-slow unchanged: ≥1 landing this tick AND no `'flying'` planes remain (a landing while another plane is still airborne does not pause — there would be nothing to auto-resume it). No idle-enforcement or auto-restore of the pause exists
+- **Starting a flight auto-resumes a paused sim (ISS-041).** `flyPlane()` (`lib/game/actions.ts`) writes `sim_state.paused = false` before persisting — inside `runAction()`, so tick + unpause + dispatch are atomic under the sim lock. The cycle: dispatch unpauses → last landing pauses (speed preserved) → next dispatch unpauses again
+- Tests: unit — `lib/sim/engine.test.ts`: the auto-slow describe block rewritten for pause semantics (last plane lands → `paused === true` AND stored `timeScale` UNCHANGED, persisted on the DB row; a landing while another plane is still flying → no pause; last landing at scale 1 → pauses anyway; paused tick with a fully grounded fleet → trigger never fires). `lib/game/actions.test.ts`: new test — dispatching on a paused sim clears `paused` and leaves `timeScale` untouched. E2E — `e2e/auto-slow.spec.ts` renamed to `e2e/pause-on-landing.spec.ts` and reworked: after the starter lands, asserts `simState.paused === true` AND `timeScale` still 1000 (NOT reset), then a subsequent `/fly` dispatch clears `paused` on its own post-action snapshot. Cross-cutting fix for the new pause: every per-spec `setScale` helper (`actions`, `hover`, `map-interactions`, `relocation`, `right-pane`) now POSTs `{ timeScale, paused: false }` — a landing pauses the sim, so a scale-only fast-forward after one would leave the clock frozen and hang the next wait; no caller relied on it NOT clearing pause (verified per call site). Deliberate mid-test pauses (`sim.spec.ts` / `panes.spec.ts` freeze tests, marker-click freezes) are untouched
+- Verified: `tsc --noEmit` clean; unit suite green locally (291); `npx playwright test --list` = 42 tests in 12 files; e2e not run locally by design — CI verifies against an isolated stack
+
+## v0.23.2 — 2026-09-20 09:15
+- **On-board package hover previews the route from the carrier's current position (ISS-040).** Hovering a loaded package in the left pane used to draw the great-circle trace from the package's ORIGIN airport; it now starts at the carrying plane's live lat/lon — identical while grounded at the pickup, correct once the plane has departed with cargo still loaded. New pure builder `hoverTraceGeoJson(from: AirportCoord, toIcao, airportsByIcao)` in `lib/mapData.ts` (sibling of `hoverRouteGeoJson`, same shape/conventions; empty collection when the destination is missing); `components/Map.tsx`'s `applyHoverRef` looks up the carrier via the hover's `planeId` and uses it, falling back to the ICAO trace when no carrier is in state. The `[state]` effect now also re-applies the hover so the trace follows a moving carrier between polls while hovered (idempotent: one small setData + ring filters). Endpoint rings untouched — still ICAO-filtered origin/dest circles
+- Tests: unit — `lib/mapData.test.ts` gains a `hoverTraceGeoJson` block (exact endpoints from an arbitrary start coord; empty on missing dest). E2E — `e2e/hover.spec.ts`: new test loads a package at EDDF, dispatches the starter to LEMD via API, waits until its live position is >0.2° away from the hub, pauses the sim, hovers the on-board row and asserts some rendered trace segment starts within EPS of the carrier's live lat/lon AND some ends within EPS of LEMD AND no segment starts near EDDF (per-tile clipping handled via the existing cross-segment endpoint pattern); cleanup resumes + fast-forwards to arrival (auto-delivery) and flies home
+
+## v0.23.1 — 2026-09-20 08:42
+- **Toasts repositioned to the map's right edge (ISS-039).** The `.toasts` stack was `position: fixed` at the viewport bottom-right, overlapping the 280px right pane; its `right` changed 12px → 292px (= 280px right pane + 12px inset) so it now sits flush against the map's right edge with the same 12px margin. No JSX/endpoint changes — all positioning lives in that one CSS value
+- Tests: e2e wording only — `toasts.spec.ts` header comment, test title, and toast visibility assertion message updated from "bottom-right" to "map right edge / clear of the right pane"; no position assertions added (none existed), suite unchanged at 41 tests in 12 files
+- Verified: `tsc --noEmit` clean; unit suite green locally (288); `npx playwright test --list` = 41 tests in 12 files; e2e not run locally by design — CI verifies against an isolated stack
+
+## v0.23.0 — 2026-09-20 08:25
+- **Refuel-to-full row moves to the left pane (ISS-035).** Refueling a grounded plane is "anything with our plane", so it belongs in the left pane next to Relocate, not as a market row on the right. The `.market-row` JSX (`market-refuel-none` "All tanks full." span / `market-refuel-plane` select of grounded planes labeled `{planeName} — {fuel}/{maxFuel} L`, `market-refuel-cost` preview, `market-refuel` button → `POST /api/planes/{id}/refuel`) moved verbatim from the Market section in `components/RightPane.tsx` into a new "Refuel" `<section data-testid="refuel-section">` in `components/LeftPane.tsx`, inserted between Relocate and Time. Its state (`refuelPlaneId`) + derived values (`refuelable`, effective-selection `refuelPlane`, `refuelCost`) moved with it, reusing LeftPane's existing `grounded` list; busy gating rewired from RightPane's `busy` to LeftPane's own `useGameAction` instance (`actionsBusy`). Testids kept byte-identical so all e2e locators are unchanged. The per-package "Refuel" button in the On board section (`refuel-for-{pkg.id}`, mode 'forFlight') is a different feature and stays put; exported helpers `slotsUsedFor` / `loadEligiblePlanes` untouched
+- Tests: e2e — `right-pane.spec.ts`: the market test keeps its buy/sell assertions, renamed to reflect that the refuel row now renders inside `[data-testid="left-pane"]` (asserted before the click); functional cash/tank assertions unchanged; the for-leg test's title/comment updated from "market button" to left pane. `panes.spec.ts`: first test gains structural assertions — Refuel heading + `market-refuel` visible in the left pane, both absent from the right pane (same present-in-left / absent-from-right pattern as On board). No unit-test changes (suite stays at 288)
+- Verified: `tsc --noEmit` clean; unit suite green locally (288); `npx playwright test --list` = 41 tests in 12 files; e2e not run locally by design — CI verifies against an isolated stack
+
 ## v0.22.2 — 2026-09-20 07:32
 - Docs: ORCHESTRATOR.md successor-agent manual committed to the repo; its token reference now points to the gitignored local .env (GITEA_TOKEN, rotated after the Sept 2026 incident); §9 rewritten as durable 'how to find current state' guidance instead of a stale snapshot; no code changes
 

app/api/packages/[id]/load/route.ts

@@ -1,10 +1,11 @@
 import { loadPackage, performAction } from '@/lib/game/actions';
 
 // POST /api/packages/:id/load (v0.12.0) — body { planeId: string }. Loads an OPEN
-// package onto a GROUNDED plane at the package's origin with a free slot. 400
-// missing/non-string planeId or unknown fields; 404 unknown package/plane id; 409
-// wrong package status, plane flying, plane not at the origin, no free slots. On
-// success returns the full state snapshot (package now "loaded" on that plane).
+// package onto a GROUNDED plane at the package's origin with enough payload room
+// for its weight (v0.27.0). 400 missing/non-string planeId or unknown fields; 404
+// unknown package/plane id; 409 wrong package status, plane flying, plane not at
+// the origin, no payload room. On success returns the full state snapshot
+// (package now "loaded" on that plane).
 
 export async function POST(req: Request, ctx: { params: Promise<{ id: string }> }) {
   const { id } = await ctx.params;

app/api/planes/[planeId]/queue/cancel/route.ts

@@ -0,0 +1,34 @@
+import { cancelQueuedLeg, performAction } from '@/lib/game/actions';
+
+// POST /api/planes/:planeId/queue/cancel (v0.25.0, ISS-043) — body { index: number }.
+// Removes a NOT-yet-started leg from the plane's queue by index; only queued legs
+// are cancellable, the active in-flight leg is never affected. 400 missing/
+// non-integer index, unknown fields, or an index outside [0, queue.length); 404
+// unknown plane id. On success returns the full state snapshot (plane.queue updated).
+
+export async function POST(req: Request, ctx: { params: Promise<{ planeId: string }> }) {
+  const { planeId } = await ctx.params;
+
+  let body: unknown;
+  try {
+    const text = await req.text();
+    body = text ? JSON.parse(text) : {};
+  } catch {
+    return Response.json({ error: 'invalid JSON body' }, { status: 400 });
+  }
+  if (typeof body !== 'object' || body === null || Array.isArray(body)) {
+    return Response.json({ error: 'body must be a JSON object' }, { status: 400 });
+  }
+  const input = body as Record<string, unknown>;
+  for (const key of Object.keys(input)) {
+    if (key !== 'index') {
+      return Response.json({ error: `unknown field "${key}"` }, { status: 400 });
+    }
+  }
+  if (!Number.isInteger(input.index)) {
+    return Response.json({ error: 'index must be an integer' }, { status: 400 });
+  }
+
+  const index = input.index as number;
+  return performAction((inst) => cancelQueuedLeg(inst, planeId, index));
+}

app/api/planes/[planeId]/queue/route.ts

@@ -0,0 +1,35 @@
+import { performAction, queueLeg } from '@/lib/game/actions';
+
+// POST /api/planes/:planeId/queue (v0.25.0, ISS-043) — body { destIcao: string }.
+// Appends a NOT-yet-started leg to the plane's flight queue; works whether the
+// plane is grounded or flying (pre-building a route). Nothing auto-starts here —
+// queued legs chain on landing when fuel covers them. 400 missing/non-string
+// destIcao, unknown fields, or an ICAO not in the airport dataset; 404 unknown
+// plane id. On success returns the full state snapshot (plane.queue updated).
+
+export async function POST(req: Request, ctx: { params: Promise<{ planeId: string }> }) {
+  const { planeId } = await ctx.params;
+
+  let body: unknown;
+  try {
+    const text = await req.text();
+    body = text ? JSON.parse(text) : {};
+  } catch {
+    return Response.json({ error: 'invalid JSON body' }, { status: 400 });
+  }
+  if (typeof body !== 'object' || body === null || Array.isArray(body)) {
+    return Response.json({ error: 'body must be a JSON object' }, { status: 400 });
+  }
+  const input = body as Record<string, unknown>;
+  for (const key of Object.keys(input)) {
+    if (key !== 'destIcao') {
+      return Response.json({ error: `unknown field "${key}"` }, { status: 400 });
+    }
+  }
+  if (typeof input.destIcao !== 'string' || input.destIcao.length === 0) {
+    return Response.json({ error: 'destIcao must be a non-empty string' }, { status: 400 });
+  }
+
+  const destIcao = input.destIcao;
+  return performAction((inst) => queueLeg(inst, planeId, destIcao));
+}

app/api/state/route.test.ts

@@ -58,7 +58,7 @@ describe('GET /api/state', () => {
 
     const packages = body.packages as Array<Record<string, unknown>>;
     expect(packages.length).toBeGreaterThan(0);
-    for (const key of ['id', 'originIcao', 'destIcao', 'reward', 'cargoType', 'deadlineSimTime', 'status']) {
+    for (const key of ['id', 'originIcao', 'destIcao', 'reward', 'cargoType', 'weightKg', 'deadlineSimTime', 'status']) {
       expect(packages[0], `package.${key}`).toHaveProperty(key);
     }
   });
@@ -86,7 +86,7 @@ describe('GET /api/state', () => {
       expect(entry.maxFuel).toBe(type.maxFuel);
       expect(entry.burnPerKm).toBe(type.burnPerKm);
       expect(entry.speedKmh).toBe(type.speedKmh);
-      expect(entry.capacity).toBe(type.capacity); // v0.12.0 slot capacity (ATR 72-600: 6)
+      expect(entry.maxPayloadKg).toBe(type.maxPayloadKg); // v0.27.0 payload kg (ATR 72-600: 4800)
     }
 
     // Economy constants — the single source of truth stays lib/game/catalog.ts.

app/api/test/create-package/route.ts

@@ -14,11 +14,13 @@ import { tickNow } from '@/lib/sim/engine';
 // same gate, same conventions.
 //
 // POST /api/test/create-package
-//   body { originIcao?: string, destIcao?: string, deadlineOffsetMs?: number }
+//   body { originIcao?: string, destIcao?: string, deadlineOffsetMs?: number, weightKg?: number }
 //   - ICACOs must exist in the airport dataset and differ (400 otherwise);
 //     omitted endpoints are picked at random by generatePackage.
 //   - deadlineOffsetMs defaults to a normal 6–72h game-time window (NOT the short
 //     hook deadline of expire-package) — pass an explicit value to override.
+//   - weightKg (v0.27.0) forces the package weight instead of the RNG draw, so e2e
+//     flows that load several packages can stay under the plane's payload deterministically.
 //   Returns 201 + the created package row.
 
 export async function POST(req: Request) {
@@ -38,7 +40,7 @@ export async function POST(req: Request) {
   }
   const input = body as Record<string, unknown>;
   for (const key of Object.keys(input)) {
-    if (key !== 'originIcao' && key !== 'destIcao' && key !== 'deadlineOffsetMs') {
+    if (key !== 'originIcao' && key !== 'destIcao' && key !== 'deadlineOffsetMs' && key !== 'weightKg') {
       return Response.json({ error: `unknown field "${key}"` }, { status: 400 });
     }
   }
@@ -50,6 +52,9 @@ export async function POST(req: Request) {
   if (input.deadlineOffsetMs !== undefined && (typeof input.deadlineOffsetMs !== 'number' || !Number.isFinite(input.deadlineOffsetMs))) {
     return Response.json({ error: 'deadlineOffsetMs must be a finite number' }, { status: 400 });
   }
+  if (input.weightKg !== undefined && (typeof input.weightKg !== 'number' || !Number.isFinite(input.weightKg) || input.weightKg <= 0)) {
+    return Response.json({ error: 'weightKg must be a positive finite number' }, { status: 400 });
+  }
 
   try {
     const inst = await getGameDb();
@@ -79,6 +84,7 @@ export async function POST(req: Request) {
       deadlineOffsetMs: input.deadlineOffsetMs as number | undefined,
       originIcao: input.originIcao as string | undefined,
       destIcao: input.destIcao as string | undefined,
+      weightKg: input.weightKg as number | undefined,
     });
     await inst.db.insert(schema.packages).values(created);
     await persist(inst);

app/globals.css

@@ -103,11 +103,11 @@ body {
 }
 
 /* v0.9.0 — single-screen 3-pane shell: left Assets / center map / right Jobs & Market.
-   ISS-021 (v0.20.0): left widened to 360px (it now carries the On board section), right
-   narrowed to 280px — total fixed width stays 640px, so the map column is unchanged. */
+   ISS-021 (v0.20.0): left widened to 360px (it now carries the On board section).
+   ISS-046 (v0.27.1): right widened to match left at 360px — total fixed width 720px, map column shrinks by 80px. */
 .app-shell {
   display: grid;
-  grid-template-columns: 360px minmax(0, 1fr) 280px;
+  grid-template-columns: 360px minmax(0, 1fr) 360px;
   height: 100%;
 }
 
@@ -416,11 +416,36 @@ body {
   gap: 6px;
 }
 
+/* ISS-043 (v0.26.0) — flight-queue sub-section inside on-board blocks */
+.queue-subsection {
+  margin-top: 8px;
+  padding-top: 6px;
+  border-top: 1px solid rgba(148, 163, 184, 0.2);
+  display: flex;
+  flex-direction: column;
+  gap: 5px;
+}
+
+.queue-heading {
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  color: #94a3b8;
+}
+
+.queue-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 8px;
+}
+
 /* v0.17.0 — ISS-008: bottom-right toast stack (action errors + game events) */
 .toasts {
   position: fixed;
   bottom: 12px;
-  right: 12px;
+  /* 360px right pane + 12px inset — sits flush against the map's right edge, clear of the right pane */
+  right: 372px;
   z-index: 50; /* above map popups/controls and the app header */
   display: flex;
   flex-direction: column;

components/LeftPane.tsx

@@ -9,7 +9,7 @@ import { formatCash, formatDeadlineRelative, formatFuel, formatSimClock } from '
 import { TIME_SCALES, scaleToSlider, sliderToScale } from '@/lib/timeScale';
 import { useGameAction } from '@/lib/useGameAction';
 import { useSimClock } from '@/lib/useSimClock';
-import { slotsUsedFor } from './RightPane';
+import { cargoWeightFor } from './RightPane';
 import type { HoverTarget } from './hoverTypes';
 
 interface LeftPaneProps {
@@ -39,13 +39,12 @@ function planeLocation(p: PlaneState): string {
   return p.locationName;
 }
 
-// Cargo loadout "n/capacity pkgs" — expired packages still occupy their slot.
+// Cargo loadout "X.Xt / Y.Yt" (v0.27.0) — used/max payload in tonnes, one decimal;
+// expired packages still occupy their payload.
 function loadoutFor(state: StateSnapshot, p: PlaneState): string {
-  const used = state.packages.filter(
-    (pkg) => pkg.planeId === p.id && (pkg.status === 'loaded' || pkg.status === 'expired'),
-  ).length;
-  const capacity = state.catalog.find((e) => e.model === p.model)?.capacity ?? PLANE_TYPES[p.model]?.capacity ?? 0;
-  return `${used}/${capacity} pkgs`;
+  const used = cargoWeightFor(state, p.id);
+  const maxPayloadKg = state.catalog.find((e) => e.model === p.model)?.maxPayloadKg ?? PLANE_TYPES[p.model]?.maxPayloadKg ?? 0;
+  return `${(used / 1000).toFixed(1)}t / ${(maxPayloadKg / 1000).toFixed(1)}t`;
 }
 
 // ISS-001 — an optimistic slider value is cleared exactly when a rendered snapshot CONFIRMS it
@@ -102,6 +101,15 @@ export default function LeftPane({ state, loading, error, onRefresh, applySnapsh
   const [relocatePlaneId, setRelocatePlaneId] = useState<string | null>(null);
   const [relocateDestIcao, setRelocateDestIcao] = useState<string | null>(null);
 
+  // ISS-035 (v0.23.0): Refuel-to-full selection — moved here from the right-pane market row; same
+  // "effective selection" pattern as Relocate above: the user's pick while it stays refuelable, else
+  // a sensible default (first grounded plane with fuel below max).
+  const [refuelPlaneId, setRefuelPlaneId] = useState<string | null>(null);
+
+  // ISS-043 (v0.26.0): flight-queue "add" destination — one shared pick across every on-board
+  // block's queue-add select (the e2e fleet is a single plane; per-block state would be dead weight).
+  const [queueAddDestIcao, setQueueAddDestIcao] = useState<string | null>(null);
+
   // ISS-010 (v0.18.0): one-time /api/airports fetch per page life — destination options for the
   // Relocate section, sorted by name so e2e selection is stable. Same promise-ref pattern as Map.tsx;
   // on failure airportOptions stays null and the Relocate button simply remains disabled. Moved here
@@ -195,7 +203,11 @@ export default function LeftPane({ state, loading, error, onRefresh, applySnapsh
   // cargo or is mid-flight gets a block — its loaded/expired packages with fly-to-destination +
   // abandon controls, and flying planes show their current leg.
   const clockMs = state?.simState.clockMs ?? 0;
-  const onboard = state ? state.planes.filter((p) => p.status === 'flying' || slotsUsedFor(state, p.id) > 0) : [];
+  // ISS-043 (v0.26.0): a plane with queued legs always shows its block too — the queue is the
+  // reason it's here even when grounded with nothing on board.
+  const onboard = state
+    ? state.planes.filter((p) => p.status === 'flying' || cargoWeightFor(state, p.id) > 0 || (p.queue?.length ?? 0) > 0)
+    : [];
 
   // ISS-023 (v0.21.0): Relocate — any GROUNDED plane can be repositioned to any airport via the
   // existing fly endpoint (pure repositioning, no package needed since v0.12.0). Moved here from
@@ -205,6 +217,16 @@ export default function LeftPane({ state, loading, error, onRefresh, applySnapsh
   const relocateDest =
     airportOptions === null ? null : airportOptions.find((a) => a.icao === relocateDestIcao) ?? airportOptions[0] ?? null;
 
+  // ISS-035 (v0.23.0): Refuel-to-full — any GROUNDED plane with fuel below max can be topped up via the
+  // existing refuel endpoint (no body → server defaults to mode 'full'). Moved here from the right-pane
+  // market row; reuses `grounded` above, and with state null falls back to null.
+  const refuelable = grounded.filter((p) => p.fuel < p.maxFuel);
+  const refuelPlane =
+    (state?.planes.find((p) => p.id === refuelPlaneId && p.status === 'available' && p.fuel < p.maxFuel)) ??
+    refuelable[0] ??
+    null;
+  const refuelCost = refuelPlane && state ? (refuelPlane.maxFuel - refuelPlane.fuel) * state.fuelPricePerL : null;
+
   // Slider commit (v0.9.1): the displayed value follows the drag optimistically via
   // pendingScale; POST /api/sim fires after a 250 ms debounce, or immediately when the
   // user releases the slider (browsers fire a native 'change' on release). The server's
@@ -440,6 +462,53 @@ export default function LeftPane({ state, loading, error, onRefresh, applySnapsh
                         </div>
                       );
                     })}
+                    {/* ISS-043 (v0.26.0): flight queue — the not-yet-started legs with cancel, plus an
+                        add control reusing this pane's already-fetched airport options (no second fetch). */}
+                    <div className="queue-subsection">
+                      <span className="queue-heading">Queue</span>
+                      {plane.queue.map((icao, i) => (
+                        <div key={`${icao}-${i}`} data-testid={`queue-leg-${i}`} className="queue-row">
+                          <span className="contract-route">
+                            {airportOptions?.find((a) => a.icao === icao)?.name ?? icao} ({icao})
+                          </span>
+                          <button
+                            type="button"
+                            data-testid={`queue-cancel-${i}`}
+                            className="pane-btn"
+                            disabled={actionsBusy}
+                            onClick={() => void runAction(`/api/planes/${plane.id}/queue/cancel`, { index: i })}
+                          >
+                            Cancel
+                          </button>
+                        </div>
+                      ))}
+                      <div className="market-row">
+                        <select
+                          data-testid="queue-add-dest"
+                          aria-label="Airport to add to the flight queue"
+                          value={queueAddDestIcao ?? ''}
+                          onChange={(e) => setQueueAddDestIcao(e.target.value || null)}
+                        >
+                          <option value="">Select an airport…</option>
+                          {airportOptions?.map((a) => (
+                            <option key={a.icao} value={a.icao}>
+                              {a.name}
+                            </option>
+                          ))}
+                        </select>
+                        <button
+                          type="button"
+                          data-testid="queue-add"
+                          className="pane-btn"
+                          disabled={actionsBusy || queueAddDestIcao === null}
+                          onClick={() => {
+                            if (queueAddDestIcao) void runAction(`/api/planes/${plane.id}/queue`, { destIcao: queueAddDestIcao });
+                          }}
+                        >
+                          Add to queue
+                        </button>
+                      </div>
+                    </div>
                   </div>
                 );
               })
@@ -507,6 +576,50 @@ export default function LeftPane({ state, loading, error, onRefresh, applySnapsh
             </div>
           </section>
 
+          {/* ISS-035 (v0.23.0): moved here from the right-pane market row — it belongs with everything else
+              about our planes, next to Relocate. Plain section: no hover handlers (refuel is not a route). */}
+          <section className="pane-section" data-testid="refuel-section">
+            <h3 className="pane-heading">Refuel</h3>
+            {/* Moved verbatim from the right-pane Market section — same testids/labels; the per-package
+                "Refuel" button in On board (mode 'forFlight') is a different feature and stays there. */}
+            <div className="market-row">
+              {refuelable.length === 0 ? (
+                <span data-testid="market-refuel-none" className="pane-muted">
+                  All tanks full.
+                </span>
+              ) : (
+                <>
+                  <select
+                    data-testid="market-refuel-plane"
+                    aria-label="Plane to refuel"
+                    value={refuelPlane?.id ?? ''}
+                    onChange={(e) => setRefuelPlaneId(e.target.value || null)}
+                  >
+                    {refuelable.map((p) => (
+                      <option key={p.id} value={p.id}>
+                        {PLANE_TYPES[p.model]?.name ?? p.model} — {Math.round(p.fuel)} / {p.maxFuel} L
+                      </option>
+                    ))}
+                  </select>
+                  <span data-testid="market-refuel-cost" className="market-preview">
+                    {refuelCost !== null ? formatCash(refuelCost) : ''}
+                  </span>
+                </>
+              )}
+              <button
+                type="button"
+                data-testid="market-refuel"
+                className="pane-btn"
+                disabled={actionsBusy || refuelPlane === null}
+                onClick={() => {
+                  if (refuelPlane) void runAction(`/api/planes/${refuelPlane.id}/refuel`);
+                }}
+              >
+                Refuel to full
+              </button>
+            </div>
+          </section>
+
           <section className="pane-section">
             <h3 className="pane-heading">Time</h3>
             <p data-testid="sim-clock" className="sim-clock">

components/Map.tsx

@@ -8,7 +8,7 @@ import { DEFAULT_STYLE_ID, STYLES, STYLE_STORAGE_KEY, isStyleId, localAssetsAvai
 import type { GeoJsonFeatureCollection } from '../lib/airports';
 import type { StateSnapshot } from '../lib/game/state';
 import type { HoverTarget } from './hoverTypes';
-import { hoverRouteGeoJson, planesGeoJson, routesGeoJson, type AirportCoord, type PlaneFeatureProps } from '../lib/mapData';
+import { hoverRouteGeoJson, hoverTraceGeoJson, planesGeoJson, queuedRoutesGeoJson, routesGeoJson, type AirportCoord, type PlaneFeatureProps } from '../lib/mapData';
 import { weatherFor } from '../lib/weather';
 import { approxLocalTime } from '../lib/localTime';
 
@@ -28,6 +28,10 @@ const PLANES_GROUNDED_LAYER_ID = 'planes-grounded';
 const PLANES_FLYING_LAYER_ID = 'planes-flying';
 const ROUTES_SOURCE_ID = 'routes';
 const ROUTES_LEGS_LAYER_ID = 'routes-legs';
+// ISS-043 (v0.26.0): the dotted queue line — a flying plane's NOT-yet-started legs
+// (dest → queue[0] → …) as their own source + layer, drawn under everything else dynamic.
+const QUEUE_ROUTES_SOURCE_ID = 'queue-routes';
+const QUEUE_ROUTES_LAYER_ID = 'queue-routes';
 // ISS-002 (v0.15.0): top-most hover-highlight layers, added after the base layers so they
 // render above them. Each starts filtered to match nothing; applyHoverRef drives the filters.
 const PLANES_HIGHLIGHT_LAYER_ID = 'planes-highlight';
@@ -95,11 +99,19 @@ export default function FlightMap({ state, hovered, applySnapshot }: MapProps) {
     if (routesSource && airportsIndexRef.current) {
       void routesSource.setData(routesGeoJson(st, airportsIndexRef.current));
     }
+    // ISS-043 (v0.26.0): the dotted queue line — same airport-index guard as the solid legs above.
+    const queueRoutesSource = map.getSource(QUEUE_ROUTES_SOURCE_ID) as maplibregl.GeoJSONSource | undefined;
+    if (queueRoutesSource && airportsIndexRef.current) {
+      void queueRoutesSource.setData(queuedRoutesGeoJson(st.planes, airportsIndexRef.current));
+    }
   };
 
   useEffect(() => {
     stateRef.current = state ?? null;
     applyDynamicRef.current();
+    // ISS-040 (v0.23.2): re-apply the hover too, so an on-board package's trace follows a moving
+    // carrier between polls while hovered — idempotent and cheap (one small setData + ring filters).
+    applyHoverRef.current();
   }, [state]);
 
   // ISS-002 (v0.15.0): hover highlight — same ref + effect pattern as the snapshot above.
@@ -138,7 +150,14 @@ export default function FlightMap({ state, hovered, applySnapshot }: MapProps) {
     // ICAOs (package origin→dest / relocate fromIcao→toIcao); empty when either endpoint is unknown.
     const hoverSource = map.getSource(HOVER_ROUTES_SOURCE_ID) as maplibregl.GeoJSONSource | undefined;
     if (hoverSource) {
-      void hoverSource.setData(hoverRouteGeoJson(fromIcao, toIcao, airportsIndexRef.current ?? new Map()));
+      // ISS-040 (v0.23.2): an on-board package's trace starts from the carrier plane's LIVE position,
+      // not its origin airport — identical to before while grounded at the pickup, different once it
+      // has departed with cargo still loaded. No carrier in state yet → fall back to the ICAO trace.
+      const idx = airportsIndexRef.current ?? new Map();
+      const carrier = h?.kind === 'package' && h.planeId ? stateRef.current?.planes.find((p) => p.id === h.planeId) : undefined;
+      void hoverSource.setData(
+        carrier ? hoverTraceGeoJson({ lat: carrier.lat, lon: carrier.lon }, toIcao, idx) : hoverRouteGeoJson(fromIcao, toIcao, idx),
+      );
     }
     // Package hovers ring BOTH endpoints (v0.15.0 behavior); 'route' hovers ring the TARGET only —
     // the relocation's destination is what ISS-027 asks to see. Plane hovers ring nothing.
@@ -347,6 +366,27 @@ export default function FlightMap({ state, hovered, applySnapshot }: MapProps) {
             },
           });
         }
+        // ISS-043 (v0.26.0): dotted queue line — added after routes-legs but BEFORE the hover
+        // layers so a hovered trace still draws on top of it. Muted slate + fine dots reads as
+        // "planned/future", distinct from the solid amber active leg and the [2,2] yellow hover dash.
+        if (!map.getSource(QUEUE_ROUTES_SOURCE_ID)) {
+          map.addSource(QUEUE_ROUTES_SOURCE_ID, {
+            type: 'geojson',
+            data: queuedRoutesGeoJson(stateRef.current?.planes ?? [], airportsIndexRef.current ?? new Map()),
+          });
+        }
+        if (!map.getLayer(QUEUE_ROUTES_LAYER_ID)) {
+          map.addLayer({
+            id: QUEUE_ROUTES_LAYER_ID,
+            type: 'line',
+            source: QUEUE_ROUTES_SOURCE_ID,
+            paint: {
+              'line-color': '#64748b', // muted slate — planned legs, not actively flying
+              'line-width': 3,
+              'line-dasharray': [0.1, 1.5], // dotted — distinct from solid legs and the [2,2] hover dash
+            },
+          });
+        }
         if (!map.getSource(PLANES_SOURCE_ID)) {
           map.addSource(PLANES_SOURCE_ID, { type: 'geojson', data: planesGeoJson(stateRef.current) });
         }

components/RightPane.tsx

@@ -23,23 +23,25 @@ interface RightPaneProps {
 
 const planeName = (p: PlaneState): string => PLANE_TYPES[p.model]?.name ?? p.model;
 
-// Packages occupying a plane's slots — 'loaded' cargo plus 'expired' cargo, which
-// keeps its slot until it is abandoned or the plane lands at its destination.
-export function slotsUsedFor(state: StateSnapshot, planeId: string): number {
-  return state.packages.filter(
-    (p) => p.planeId === planeId && (p.status === 'loaded' || p.status === 'expired'),
-  ).length;
+// Cargo weight (kg) occupying a plane's payload — 'loaded' cargo plus 'expired'
+// cargo, which keeps its space until it is abandoned or the plane lands at its
+// destination.
+export function cargoWeightFor(state: StateSnapshot, planeId: string): number {
+  return state.packages
+    .filter((p) => p.planeId === planeId && (p.status === 'loaded' || p.status === 'expired'))
+    .reduce((sum, p) => sum + p.weightKg, 0);
 }
 
-// Planes that can load `pkg` right now: GROUNDED at the package's origin with a
-// free slot (capacity from the snapshot catalog). The Load button is enabled iff
-// this list is non-empty; exactly one entry loads directly, several show a picker.
+// Planes that can load `pkg` right now: GROUNDED at the package's origin with enough
+// payload room for it (maxPayloadKg from the snapshot catalog). The Load button is
+// enabled iff this list is non-empty; exactly one entry loads directly, several show a picker.
 export function loadEligiblePlanes(state: StateSnapshot, pkg: PackageState): PlaneState[] {
   return state.planes.filter((p) => {
     if (p.status !== 'available') return false;
     if (p.locationIcao !== pkg.originIcao) return false;
-    const capacity = state.catalog.find((e) => e.model === p.model)?.capacity ?? 0;
-    return slotsUsedFor(state, p.id) < capacity;
+    const maxPayloadKg = state.catalog.find((e) => e.model === p.model)?.maxPayloadKg ?? 0;
+    // Mirrors the server check in lib/game/actions.ts loadPackage.
+    return cargoWeightFor(state, p.id) + pkg.weightKg <= maxPayloadKg;
   });
 }
 
@@ -116,10 +118,11 @@ export default function RightPane({ state, loading, applySnapshot, onHover, onEr
   // user's pick while it stays valid, else a sensible default (first catalog entry / first plane).
   const [buyModelId, setBuyModelId] = useState<string | null>(null);
   const [sellPlaneId, setSellPlaneId] = useState<string | null>(null);
-  const [refuelPlaneId, setRefuelPlaneId] = useState<string | null>(null);
 
   // ISS-023 (v0.21.0): the Relocate row moved to the left pane — it belongs with everything else
   // about our planes, not in the market. Its state + /api/airports fetch went with it.
+  // ISS-035 (v0.23.0): same for the Refuel-to-full row — its state + derived values moved to the
+  // left pane's "Refuel" section next to Relocate.
 
   if (loading && !state) {
     return (
@@ -139,15 +142,9 @@ export default function RightPane({ state, loading, applySnapshot, onHover, onEr
 
   const grounded = state.planes.filter((p) => p.status === 'available');
   const sellPlane = state.planes.find((p) => p.id === sellPlaneId && p.status === 'available') ?? grounded[0] ?? null;
-  const refuelable = grounded.filter((p) => p.fuel < p.maxFuel);
-  const refuelPlane =
-    state.planes.find((p) => p.id === refuelPlaneId && p.status === 'available' && p.fuel < p.maxFuel) ??
-    refuelable[0] ??
-    null;
   // Previews computed client-side from the snapshot's catalog + economy constants (v0.10.0).
   const sellEntry = sellPlane ? catalog.find((e) => e.model === sellPlane.model) : undefined;
   const sellPayout = sellEntry ? Math.round(sellEntry.price * state.sellFraction * 100) / 100 : null;
-  const refuelCost = refuelPlane ? (refuelPlane.maxFuel - refuelPlane.fuel) * state.fuelPricePerL : null;
 
   return (
     <aside data-testid="right-pane" className="pane right-pane">
@@ -262,44 +259,8 @@ export default function RightPane({ state, loading, applySnapshot, onHover, onEr
           </button>
         </div>
 
-        <div className="market-row">
-          {refuelable.length === 0 ? (
-            <span data-testid="market-refuel-none" className="pane-muted">
-              All tanks full.
-            </span>
-          ) : (
-            <>
-              <select
-                data-testid="market-refuel-plane"
-                aria-label="Plane to refuel"
-                value={refuelPlane?.id ?? ''}
-                onChange={(e) => setRefuelPlaneId(e.target.value || null)}
-              >
-                {refuelable.map((p) => (
-                  <option key={p.id} value={p.id}>
-                    {planeName(p)} — {Math.round(p.fuel)} / {p.maxFuel} L
-                  </option>
-                ))}
-              </select>
-              <span data-testid="market-refuel-cost" className="market-preview">
-                {refuelCost !== null ? formatCash(refuelCost) : ''}
-              </span>
-            </>
-          )}
-          <button
-            type="button"
-            data-testid="market-refuel"
-            className="pane-btn"
-            disabled={busy || refuelPlane === null}
-            onClick={() => {
-              if (refuelPlane) void runAction(`/api/planes/${refuelPlane.id}/refuel`);
-            }}
-          >
-            Refuel to full
-          </button>
-        </div>
-
         {/* ISS-023 (v0.21.0): the Relocate row moved to the left pane's "Relocate" section. */}
+        {/* ISS-035 (v0.23.0): the Refuel-to-full row moved to the left pane's "Refuel" section, next to Relocate. */}
       </section>
 
       {actionError && <p data-testid="right-error" className="pane-error">{actionError}</p>}

components/right-pane.test.ts

@@ -1,14 +1,14 @@
 import { describe, expect, it } from 'vitest';
-import { loadEligiblePlanes, slotsUsedFor } from './RightPane';
+import { cargoWeightFor, loadEligiblePlanes } from './RightPane';
 import type { PackageState, PlaneState, StateSnapshot } from '@/lib/game/state';
 
-// v0.12.0 — the package-model picker rules: a plane can LOAD a package only while
-// it is GROUNDED at the package's origin with a free slot (capacity from the
-// snapshot catalog; expired packages still occupy theirs). The Load button acts
-// directly on the single eligible plane, or shows a picker when several qualify.
+// v0.12.0 (weight model v0.27.0) — the package-model picker rules: a plane can LOAD a
+// package only while it is GROUNDED at the package's origin with enough payload room for
+// it (maxPayloadKg from the snapshot catalog; expired packages still occupy theirs). The
+// Load button acts directly on the single eligible plane, or shows a picker when several qualify.
 
 const CATALOG = [
-  { model: 'atr72', label: 'ATR 72-600', price: 200_000, maxFuel: 6300, burnPerKm: 1.75, emptyWeightKg: 9_300, speedKmh: 510, capacity: 6 },
+  { model: 'atr72', label: 'ATR 72-600', price: 200_000, maxFuel: 6300, burnPerKm: 1.75, emptyWeightKg: 9_300, speedKmh: 510, maxPayloadKg: 4_800 },
 ];
 
 function plane(over: Partial<PlaneState> & Pick<PlaneState, 'id'>): PlaneState {
@@ -24,6 +24,7 @@ function plane(over: Partial<PlaneState> & Pick<PlaneState, 'id'>): PlaneState {
     departureSimTime: null,
     lat: 50,
     lon: 8.5,
+    queue: [],
     ...over,
   };
 }
@@ -37,6 +38,7 @@ function pkg(over: Partial<PackageState> & Pick<PackageState, 'id'>): PackageSta
     reward: 1000,
     cargoType: 'mail',
     cargoCount: 4,
+    weightKg: 1_000,
     deadlineSimTime: 1_000_000,
     status: 'open',
     planeId: null,
@@ -57,27 +59,27 @@ function snap(planes: PlaneState[], packages: PackageState[] = []): StateSnapsho
   };
 }
 
-describe('slotsUsedFor', () => {
-  it('counts loaded AND expired packages bound to the plane (both occupy a slot)', () => {
+describe('cargoWeightFor', () => {
+  it('sums the weight of loaded AND expired packages bound to the plane (both occupy payload)', () => {
     const s = snap(
       [plane({ id: 'p1' })],
       [
-        pkg({ id: 'a', status: 'loaded', planeId: 'p1' }),
-        pkg({ id: 'b', status: 'expired', planeId: 'p1' }),
-        pkg({ id: 'c', status: 'open', planeId: null }), // not on any plane
-        pkg({ id: 'd', status: 'delivered', planeId: 'p1' }), // terminal — slot long freed
+        pkg({ id: 'a', status: 'loaded', planeId: 'p1', weightKg: 800 }),
+        pkg({ id: 'b', status: 'expired', planeId: 'p1', weightKg: 500 }),
+        pkg({ id: 'c', status: 'open', planeId: null, weightKg: 9_000 }), // not on any plane
+        pkg({ id: 'd', status: 'delivered', planeId: 'p1', weightKg: 700 }), // terminal — payload long freed
       ],
     );
-    expect(slotsUsedFor(s, 'p1')).toBe(2);
+    expect(cargoWeightFor(s, 'p1')).toBe(1_300);
   });
 
   it('is 0 for a plane with no bound cargo', () => {
-    expect(slotsUsedFor(snap([plane({ id: 'p1' })]), 'p1')).toBe(0);
+    expect(cargoWeightFor(snap([plane({ id: 'p1' })]), 'p1')).toBe(0);
   });
 });
 
 describe('loadEligiblePlanes (Load button eligibility)', () => {
-  it('includes only grounded planes at the package origin with a free slot', () => {
+  it('includes only grounded planes at the package origin with enough payload room', () => {
     const s = snap([
       plane({ id: 'at-origin' }), // eligible
       plane({ id: 'elsewhere', locationIcao: 'LEMD' }), // wrong airport
@@ -86,18 +88,23 @@ describe('loadEligiblePlanes (Load button eligibility)', () => {
     expect(loadEligiblePlanes(s, pkg({ id: 'x' })).map((p) => p.id)).toEqual(['at-origin']);
   });
 
-  it('excludes a plane whose slots are full (capacity from the catalog)', () => {
-    const packages = Array.from({ length: 6 }, (_, i) =>
-      pkg({ id: `fill-${i}`, status: 'loaded', planeId: 'full' }),
+  it('a plane with partial payload can still load a package that fits', () => {
+    const s = snap([plane({ id: 'partial' })], [pkg({ id: 'onboard', status: 'loaded', planeId: 'partial', weightKg: 3_000 })]);
+    expect(loadEligiblePlanes(s, pkg({ id: 'x' })).map((p) => p.id)).toEqual(['partial']); // 3000 + 1000 ≤ 4800
+  });
+
+  it('excludes a plane whose payload is full (maxPayloadKg from the catalog)', () => {
+    const packages = Array.from({ length: 4 }, (_, i) =>
+      pkg({ id: `fill-${i}`, status: 'loaded', planeId: 'full', weightKg: 1_200 }), // 4 × 1200 = 4800
     );
     const s = snap([plane({ id: 'full' })], packages);
     expect(loadEligiblePlanes(s, pkg({ id: 'x' }))).toEqual([]);
   });
 
-  it('a full plane with one slot freed by an expired package still counts as full', () => {
+  it('a plane at its limit with an expired package still counts as full', () => {
     const packages = [
-      ...Array.from({ length: 5 }, (_, i) => pkg({ id: `fill-${i}`, status: 'loaded', planeId: 'full' })),
-      pkg({ id: 'exp', status: 'expired', planeId: 'full' }), // occupies its slot
+      ...Array.from({ length: 4 }, (_, i) => pkg({ id: `fill-${i}`, status: 'loaded', planeId: 'full', weightKg: 960 })),
+      pkg({ id: 'exp', status: 'expired', planeId: 'full', weightKg: 960 }), // occupies its payload — 5 × 960 = 4800
     ];
     const s = snap([plane({ id: 'full' })], packages);
     expect(loadEligiblePlanes(s, pkg({ id: 'x' }))).toEqual([]);
@@ -113,7 +120,7 @@ describe('loadEligiblePlanes (Load button eligibility)', () => {
     expect(loadEligiblePlanes(s, pkg({ id: 'x' }))).toEqual([]);
   });
 
-  it('a plane with an unknown model has no capacity → never eligible', () => {
+  it('a plane with an unknown model has no maxPayloadKg in the catalog → never eligible', () => {
     const s = snap([plane({ id: 'mystery', model: 'mystery' })]);
     expect(loadEligiblePlanes(s, pkg({ id: 'x' }))).toEqual([]);
   });

e2e/actions.spec.ts

@@ -53,8 +53,16 @@ async function getState(page: Page): Promise<StateBody> {
 }
 
 // The e2e instance runs with FLIGHT_TEST_HOOKS=1 (docker-compose.yml) — the hook is live.
-async function createPackage(page: Page, from?: string, to?: string, deadlineOffsetMs?: number): Promise<StateBody['packages'][number]> {
-  const res = await page.request.post('/api/test/create-package', { data: { originIcao: from, destIcao: to, deadlineOffsetMs } });
+// weightKg (v0.27.0) forces the package weight instead of the RNG draw, so flows that load
+// several packages onto one plane stay under its payload deterministically.
+async function createPackage(
+  page: Page,
+  from?: string,
+  to?: string,
+  deadlineOffsetMs?: number,
+  weightKg?: number,
+): Promise<StateBody['packages'][number]> {
+  const res = await page.request.post('/api/test/create-package', { data: { originIcao: from, destIcao: to, deadlineOffsetMs, weightKg } });
   expect(res.status()).toBe(201);
   return (await res.json()) as StateBody['packages'][number];
 }
@@ -66,8 +74,10 @@ async function postSim(page: Page, body: Record<string, unknown>): Promise<void>
 
 // Set the time scale and VERIFY from the response that it stuck — if something external ever
 // resets the live instance's controls mid-test, fail loudly here instead of timing out later.
+// ISS-041 also clears pause: a landing pauses the sim, so any fast-forward after one must
+// resume it or the clock stays frozen and the next wait hangs.
 async function setScale(page: Page, scale: number): Promise<void> {
-  const res = await page.request.post('/api/sim', { data: { timeScale: scale } });
+  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
   expect(res.status()).toBe(200);
   const body = (await res.json()) as { timeScale: number };
   expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);
@@ -118,7 +128,7 @@ async function flyHomeViaApi(page: Page): Promise<void> {
     plane = s.planes.find((p) => p.id === 'plane-starter')!;
   }
   if (plane.locationIcao !== HUB) {
-    // ISS-011: the landing above auto-slown the sim to 1× — re-set SCALE so the return leg
+    // ISS-041: the landing above paused the sim — setScale clears pause so the return leg
     // fast-forwards instead of taking real-time hours.
     await setScale(page, SCALE);
     const res = await page.request.post(`/api/planes/${plane.id}/fly`, { data: { destIcao: HUB } });
@@ -225,8 +235,8 @@ test('full core loop via UI: load → fly to destination → exact reward + rep
   const refuelCost = Math.round((afterRefuel.maxFuel - landed.fuel) * FUEL_PRICE_PER_L * 100) / 100;
   expect(s.account.cash).toBeCloseTo(before.account.cash + pkg.reward - refuelCost, 6);
 
-  // Restore: fly home (repositioning — no package needed in the v0.12.0 model). ISS-011: the
-  // arrival above auto-slown the sim to 1×, so re-set SCALE for the return leg.
+  // Restore: fly home (repositioning — no package needed in the v0.12.0 model). ISS-041: the
+  // arrival above paused the sim, so re-set SCALE for the return leg (setScale clears pause).
   await setScale(page, SCALE);
   const homeRes = await page.request.post(`/api/planes/${planeId}/fly`, { data: { destIcao: HUB } });
   expect(homeRes.ok()).toBeTruthy();
@@ -238,9 +248,10 @@ test('abandon while grounded deducts exactly the formula penalty', async ({ page
   await flyHomeViaApi(page);
   const before = await getState(page);
 
-  // Two packages at the hub — load both, abandon one through the UI.
-  const pkgA = await createPackage(page, HUB, 'LEMD', 24 * 3_600_000);
-  const pkgB = await createPackage(page, HUB, 'LEMD', 24 * 3_600_000);
+  // Two packages at the hub — load both, abandon one through the UI. Forced weights keep
+  // the pair under the starter's payload (v0.27.0) so both loads are deterministic.
+  const pkgA = await createPackage(page, HUB, 'LEMD', 24 * 3_600_000, 1_000);
+  const pkgB = await createPackage(page, HUB, 'LEMD', 24 * 3_600_000, 1_000);
   for (const p of [pkgA, pkgB]) {
     const res = await page.request.post(`/api/packages/${p.id}/load`, { data: { planeId: 'plane-starter' } });
     expect(res.ok()).toBeTruthy();
@@ -280,8 +291,8 @@ test('expired packages deliver and abandon with no reward and no penalty', async
   // destination differs from A's so it stays bound on the plane at LEMD arrival and can
   // still be abandoned (an expired package whose dest matches the arrival airport is
   // unbound by the tick instead).
-  const pkgA = await createPackage(page, HUB, 'LEMD', 10_000); // short game-time deadline
-  const pkgB = await createPackage(page, HUB, 'EHAM', 10_000);
+  const pkgA = await createPackage(page, HUB, 'LEMD', 10_000, 1_000); // short game-time deadline; forced weights keep the pair under payload (v0.27.0)
+  const pkgB = await createPackage(page, HUB, 'EHAM', 10_000, 1_000);
   for (const p of [pkgA, pkgB]) {
     const res = await page.request.post(`/api/packages/${p.id}/load`, { data: { planeId: 'plane-starter' } });
     expect(res.ok()).toBeTruthy();
@@ -314,8 +325,8 @@ test('expired packages deliver and abandon with no reward and no penalty', async
   expect(s.packages.find((p) => p.id === pkgB.id)!.status).toBe('abandoned');
   expect(s.account.cash).toBe(cashBeforeAbandon); // free — expired abandons cost nothing
 
-  // Restore: refuel + fly home. ISS-011: the LEMD arrival above auto-slown the sim to 1×, so
-  // re-set SCALE for the return leg (the expiry wait's scale no longer persists past a landing).
+  // Restore: refuel + fly home. ISS-041: the LEMD arrival above paused the sim, so
+  // re-set SCALE for the return leg (setScale clears pause; the expiry wait's scale is kept).
   await page.request.post('/api/planes/plane-starter/refuel');
   await setScale(page, SCALE);
   const homeRes = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
@@ -355,8 +366,8 @@ test('load and fly validation paths (404 / 409 / 400)', async ({ page }) => {
   res = await page.request.post(`/api/packages/${pkg.id}/abandon`);
   expect(res.status()).toBe(409);
 
-  // Fly home from the hop so the fuel section starts at the hub. ISS-011: the hop arrival above
-  // auto-slown the sim to 1×, so re-set SCALE for this leg.
+  // Fly home from the hop so the fuel section starts at the hub. ISS-041: the hop arrival above
+  // paused the sim, so re-set SCALE for this leg (setScale clears pause).
   await setScale(page, SCALE);
   res = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
   expect(res.ok()).toBeTruthy();
@@ -380,7 +391,7 @@ test('load and fly validation paths (404 / 409 / 400)', async ({ page }) => {
   const atFar = sFar.planes.find((p) => p.id === 'plane-starter')!;
   expect(atFar.locationIcao).toBe(FAR);
   // The return leg fits: the weighted burn over it is less than what's left in the tank.
-  // ISS-011: the FAR arrival above auto-slown the sim to 1×, so re-set SCALE for this leg.
+  // ISS-041: the FAR arrival above paused the sim, so re-set SCALE for this leg (setScale clears pause).
   await setScale(page, SCALE);
   const backRes = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
   expect(backRes.ok()).toBeTruthy();

e2e/api.spec.ts

@@ -13,7 +13,7 @@ test('GET /api/version returns the app version from package.json', async ({ page
   expect(body.version).toBe(pkg.version);
 });
 
-test('GET /api/openapi serves the spec with all ten endpoints and the package.json version', async ({ page }) => {
+test('GET /api/openapi serves the spec with all twelve endpoints and the package.json version', async ({ page }) => {
   const res = await page.request.get('/api/openapi');
   expect(res.status()).toBe(200);
   expect(res.headers()['content-type']).toContain('application/json');
@@ -28,6 +28,8 @@ test('GET /api/openapi serves the spec with all ten endpoints and the package.js
     '/api/packages/{id}/abandon',
     '/api/packages/{id}/load',
     '/api/planes/{planeId}/fly',
+    '/api/planes/{planeId}/queue',
+    '/api/planes/{planeId}/queue/cancel',
     '/api/planes/{planeId}/refuel',
     '/api/sim',
     '/api/state',

e2e/hover.spec.ts

@@ -24,6 +24,8 @@ interface PlaneState {
   maxFuel: number;
   locationIcao: string;
   destIcao: string | null;
+  lat: number; // live position — interpolated per snapshot while flying, airport coords when grounded
+  lon: number;
 }
 
 interface PackageState {
@@ -53,9 +55,10 @@ async function postSim(page: Page, body: unknown) {
 }
 
 // Set the time scale and VERIFY from the response that it stuck — a silent reset would
-// otherwise surface as an unexplained landing-wait timeout.
+// otherwise surface as an unexplained landing-wait timeout. ISS-041 also clears pause: a
+// landing pauses the sim, so any fast-forward after one must resume it or the clock stays frozen.
 async function setScale(page: Page, scale: number): Promise<void> {
-  const res = await page.request.post('/api/sim', { data: { timeScale: scale } });
+  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
   expect(res.status()).toBe(200);
   const body = (await res.json()) as { timeScale: number };
   expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);
@@ -93,7 +96,7 @@ async function flyHomeViaApi(page: Page): Promise<void> {
       .toBe(true);
   }
   if (starter.locationIcao !== HUB) {
-    // ISS-011: the landing above auto-slown the sim to 1× — re-set SCALE so the return leg
+    // ISS-041: the landing above paused the sim — setScale clears pause so the return leg
     // fast-forwards instead of taking real-time hours.
     await setScale(page, SCALE);
     const res = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
@@ -485,7 +488,99 @@ test('hovering an on-board block of a flying plane highlights its route', async
     }, { timeout: 120_000, message: `waiting for plane-starter to land at ${DEST}` })
     .toBe(true);
 
-  // ISS-011: the arrival above auto-slown the sim to 1×, so re-set SCALE for this leg.
+  // ISS-041: the arrival above paused the sim, so re-set SCALE for this leg (setScale clears pause).
+  await setScale(page, SCALE);
+  const home = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
+  expect(home.status()).toBe(200);
+  await expect
+    .poll(async () => (await getState(page)).planes.find((p) => p.id === 'plane-starter')?.locationIcao === HUB, {
+      timeout: 120_000,
+      message: 'waiting for plane-starter to land back at the hub',
+    })
+    .toBe(true);
+});
+
+test('hovering an on-board package while its carrier is mid-flight traces from current position', async ({ page }) => {
+  test.setTimeout(600_000); // self-heal + one flight at scale 1000 + fly-home cleanup
+  await flyHomeViaApi(page);
+
+  // Full tank before departure — the EDDF↔LEMD round trip burns ~4970 L of the 6300 L tank.
+  const refuel = await page.request.post('/api/planes/plane-starter/refuel');
+  expect(refuel.status()).toBe(200);
+
+  await page.goto('/');
+  await waitForAirportCount(page);
+
+  // Load + fly via the API (same pattern as e2e/map-interactions.spec.ts), then speed up.
+  const pkg = await createPackage(page, HUB, DEST);
+  const load = await page.request.post(`/api/packages/${pkg.id}/load`, { data: { planeId: 'plane-starter' } });
+  expect(load.status()).toBe(200);
+  const fly = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: DEST } });
+  expect(fly.status()).toBe(200);
+  await setScale(page, SCALE);
+
+  // Wait until the starter is GENUINELY mid-flight — its live position clearly away from EDDF in
+  // both axes (well past HOVER_ROUTE_EPS_DEG) so "the trace starts at the plane" and "it starts at
+  // the pickup airport" are distinguishable. The ~10 s leg at scale 1000 gives a wide window.
+  const hubLonLat = await airportLonLat(page, HUB);
+  await expect
+    .poll(async () => {
+      const p = (await getState(page)).planes.find((x) => x.id === 'plane-starter');
+      if (!p || p.status !== 'flying') return false;
+      return Math.abs(p.lon - hubLonLat[0]) > 0.2 && Math.abs(p.lat - hubLonLat[1]) > 0.2;
+    }, { timeout: 60_000, message: 'waiting for plane-starter to be clearly away from the hub' })
+    .toBe(true);
+
+  // Freeze mid-flight so the position is stable while we assert (same pause pattern as the
+  // flying-plane hover test above): paused, every /api/state snapshot reports the same lat/lon.
+  await postSim(page, { paused: true });
+
+  const row = page.locator(`[data-testid="onboard-package-${pkg.id}"]`);
+  await expect(row, 'the loaded package appears in the On board section').toBeVisible({ timeout: 15_000 });
+
+  // Both endpoints must be in-viewport for queryRenderedFeatures to see the trace.
+  await fitToAirports(page, [HUB, DEST]);
+
+  const live = (await getState(page)).planes.find((x) => x.id === 'plane-starter')!;
+  const liveLonLat: [number, number] = [live.lon, live.lat]; // stable — the sim is paused
+  const destLonLat = await airportLonLat(page, DEST);
+
+  await row.hover();
+  // ISS-040 (v0.23.2): the trace starts at the carrier's LIVE position and ends at the destination,
+  // and NO segment may start near the pickup airport (the old origin-based behavior). Same per-tile
+  // clipping/quantization caveats as expectHoverRoute — check endpoints across all segments with EPS.
+  await expect.poll(async () => {
+    const feats = (await renderedFeatures(page, ['hover-route'])) as Array<{ geometry?: { type: string; coordinates: [number, number][] } }>;
+    const segs = feats.filter(
+      (f): f is { geometry: { type: 'LineString'; coordinates: [number, number][] } } =>
+        !!f.geometry && f.geometry.type === 'LineString' && Array.isArray(f.geometry.coordinates) && f.geometry.coordinates.length >= 2,
+    );
+    if (!segs.length) return false;
+    const near = (a: [number, number], b: [number, number]) =>
+      Math.abs(a[0] - b[0]) <= HOVER_ROUTE_EPS_DEG && Math.abs(a[1] - b[1]) <= HOVER_ROUTE_EPS_DEG;
+    const startsAtLive = segs.some((f) => near(f.geometry.coordinates[0], liveLonLat));
+    const endsAtDest = segs.some((f) => near(f.geometry.coordinates[f.geometry.coordinates.length - 1], destLonLat));
+    const noneStartsAtHub = !segs.some((f) => near(f.geometry.coordinates[0], hubLonLat));
+    return startsAtLive && endsAtDest && noneStartsAtHub;
+  }, { timeout: 15_000, message: 'waiting for the hover-route trace to run from the live position to the destination' }).toBe(true);
+
+  await unhover(page);
+  await expect.poll(async () => (await renderedFeatures(page, ['hover-route'])).length, {
+    timeout: 15_000,
+    message: 'waiting for the hover route trace to clear after mouseleave',
+  }).toBe(0);
+
+  // Resume and fast-forward to arrival — landing at DEST auto-delivers the package (v0.12.0), so
+  // flying home afterwards leaves the starter clean for the other specs.
+  await postSim(page, { timeScale: SCALE, paused: false });
+  await expect
+    .poll(async () => {
+      const p = (await getState(page)).planes.find((x) => x.id === 'plane-starter');
+      return !!p && p.status === 'available' && p.locationIcao === DEST;
+    }, { timeout: 120_000, message: `waiting for plane-starter to land at ${DEST}` })
+    .toBe(true);
+
+  // ISS-041: the arrival above paused the sim, so re-set SCALE for this leg (setScale clears pause).
   await setScale(page, SCALE);
   const home = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
   expect(home.status()).toBe(200);

e2e/map-interactions.spec.ts

@@ -69,9 +69,10 @@ async function postSim(page: Page, body: unknown) {
 }
 
 // Set the time scale and VERIFY from the response that it stuck — a silent reset would
-// otherwise surface as an unexplained landing-wait timeout.
+// otherwise surface as an unexplained landing-wait timeout. ISS-041 also clears pause: a
+// landing pauses the sim, so any fast-forward after one must resume it or the clock stays frozen.
 async function setScale(page: Page, scale: number): Promise<void> {
-  const res = await page.request.post('/api/sim', { data: { timeScale: scale } });
+  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
   expect(res.status()).toBe(200);
   const body = (await res.json()) as { timeScale: number };
   expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);

e2e/panes.spec.ts

@@ -62,10 +62,10 @@ test('left pane renders wallet, reputation and the starter fleet at Frankfurt',
     await expect(row).toContainText(truth.locationName);
   }
 
-  // v0.12.0 loadout: "n/capacity pkgs" (capacity from the snapshot catalog — ATR 72-600 = 6).
+  // v0.27.0 loadout: "X.Xt / Y.Yt" tonnage (used/max payload from the snapshot catalog — ATR 72-600 = 4.8t).
   const loadout = page.getByTestId('plane-loadout-plane-starter');
   await expect(loadout).toBeVisible();
-  expect((await loadout.textContent()) ?? '').toMatch(/^\d+\/6 pkgs$/);
+  expect((await loadout.textContent()) ?? '').toMatch(/^\d+\.\dt \/ \d+\.\dt$/);
 
   // Sim clock renders (UTC wall-clock of the game time).
   await expect(page.getByTestId('sim-clock')).toContainText(/UTC/);
@@ -75,6 +75,14 @@ test('left pane renders wallet, reputation and the starter fleet at Frankfurt',
   await expect(page.getByTestId('left-pane').getByRole('heading', { name: 'On board', exact: true })).toBeVisible();
   // …and no longer in the right pane.
   await expect(page.getByTestId('right-pane').getByRole('heading', { name: 'On board', exact: true })).toHaveCount(0);
+
+  // ISS-035 (v0.23.0): the Refuel-to-full row moved to the left pane next to Relocate — its section
+  // heading and button render here…
+  await expect(page.getByTestId('left-pane').getByRole('heading', { name: 'Refuel', exact: true })).toBeVisible();
+  await expect(page.getByTestId('left-pane').getByTestId('market-refuel')).toBeVisible();
+  // …and neither the heading nor the row remains in the right pane.
+  await expect(page.getByTestId('right-pane').getByRole('heading', { name: 'Refuel', exact: true })).toHaveCount(0);
+  await expect(page.getByTestId('right-pane').getByTestId('market-refuel')).toHaveCount(0);
 });
 
 test('time controls: pause freezes the sim and the ladder slider sets timeScale', async ({ page }) => {

e2e/pause-on-landing.spec.ts

@@ -1,10 +1,11 @@
 import type { Page } from '@playwright/test';
 import { expect, test } from '@playwright/test';
 
-// v0.19.0 — ISS-011: when the LAST plane lands (no plane remains in flight) the sim auto-slows
-// to 1×, server-side and persisted on the sim_state row so the UI slider reflects it on the next
-// snapshot. Arrival-triggered by design: a grounded fleet at high scale is left alone, there is no
-// auto-restore — the player speeds up manually again (asserted below).
+// v0.24.0 — ISS-041: when the LAST plane lands (no plane remains in flight) the sim pauses
+// server-side WITHOUT touching timeScale (speed is preserved), and starting a flight
+// (POST /api/planes/{id}/fly) auto-resumes a paused sim. The cycle: dispatch unpauses →
+// last landing pauses → next dispatch unpauses again. Arrival-triggered by design: a grounded
+// fleet at high scale is left alone, there is no idle-enforcement or auto-restore of pause.
 
 const SCALE = 1000; // fastest sim speed — top of the v0.14.0 ladder (same convention as e2e/sim.spec.ts)
 const HUB = 'EDDF'; // Frankfurt Main — the seeded starter plane's home base (lib/game/seed.ts)
@@ -33,8 +34,10 @@ async function postSim(page: Page, body: Record<string, unknown>): Promise<void>
 
 // Set the time scale and VERIFY from the response that it stuck — if something external ever
 // resets the live instance's controls mid-test, fail loudly here instead of timing out later.
+// ISS-041 also clears pause: a landing pauses the sim, so any fast-forward after one must
+// resume it or the clock stays frozen and the next wait hangs.
 async function setScale(page: Page, scale: number): Promise<void> {
-  const res = await page.request.post('/api/sim', { data: { timeScale: scale } });
+  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
   expect(res.status()).toBe(200);
   const body = (await res.json()) as SimState;
   expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);
@@ -75,7 +78,7 @@ async function flyHomeViaApi(page: Page): Promise<void> {
     plane = s.planes.find((p) => p.id === 'plane-starter')!;
   }
   if (plane.locationIcao !== HUB) {
-    // ISS-011: the landing above auto-slown the sim to 1× — re-set SCALE so the return leg
+    // ISS-041: the landing above paused the sim — setScale clears pause so the return leg
     // fast-forwards instead of taking real-time hours.
     await setScale(page, SCALE);
     const res = await page.request.post(`/api/planes/${plane.id}/fly`, { data: { destIcao: HUB } });
@@ -93,8 +96,8 @@ test.afterEach(async ({ page }) => {
 
 test.describe.configure({ mode: 'serial' }); // shared live DB — order matters within this file
 
-test('auto-slow to 1× when the last plane lands; manual speed-up still works (ISS-011)', async ({ page }) => {
-  test.setTimeout(300_000); // self-heal (worst case ~20 s at 1000×) + one short leg
+test('last landing pauses the sim without changing speed; dispatch auto-resumes (ISS-041)', async ({ page }) => {
+  test.setTimeout(300_000); // self-heal (worst case ~20 s at 1000×) + two short legs
   await flyHomeViaApi(page); // deterministic: the starter sits grounded at EDDF
 
   const nearest = await nearestToHub(page);
@@ -117,14 +120,19 @@ test('auto-slow to 1× when the last plane lands; manual speed-up still works (I
     }, { timeout: 120_000, message: `waiting for plane-starter to land at ${nearest.icao}` })
     .toBe(true);
 
-  // …and the server has auto-slown to 1× — persisted on sim_state, so this very snapshot shows it.
-  expect(landedBody!.simState.timeScale).toBe(1);
+  // …and the server paused the sim — persisted on sim_state, so this very snapshot shows it…
+  expect(landedBody!.simState.paused).toBe(true);
+  // …with timeScale UNCHANGED (no auto-slow anymore): speed is preserved for the next dispatch.
+  expect(landedBody!.simState.timeScale).toBe(SCALE);
 
-  // Manual override still works: POST /api/sim {timeScale: 1000} → confirmed by the response…
-  const post = await page.request.post('/api/sim', { data: { timeScale: SCALE } });
-  expect(post.status()).toBe(200);
-  expect(((await post.json()) as SimState).timeScale).toBe(SCALE);
-  // …and by a fresh snapshot (no auto-restore of the previous scale — and no re-slow either,
-  // since nothing is in flight: the trigger is arrival-based, not idle-enforcement).
-  expect((await getState(page)).simState.timeScale).toBe(SCALE);
+  // A subsequent /fly dispatch auto-resumes a paused sim — asserted on the endpoint's OWN full
+  // post-action snapshot, so no poll race with the client's next tick.
+  const fly2 = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
+  expect(fly2.status()).toBe(200);
+  const resumedBody = (await fly2.json()) as StateBody;
+  expect(resumedBody.simState.paused).toBe(false); // ISS-041 auto-unpause…
+  expect(resumedBody.simState.timeScale).toBe(SCALE); // …with the preserved speed still in effect
+
+  // Let the return leg finish so cleanup starts from a grounded plane.
+  await expect.poll(async () => ((await getState(page)).planes.find((p) => p.id === 'plane-starter')!.status), { timeout: 120_000 }).toBe('available');
 });

e2e/queue.spec.ts

@@ -0,0 +1,384 @@
+import { test, expect, type Page } from '@playwright/test';
+
+// v0.26.0 — ISS-043 part 2 (UI): the flight queue. A plane's not-yet-started legs show up in a
+// Queue sub-section of its on-board block (add via airport select + button, cancel per leg), and
+// a flying plane with queued legs draws them as a DOTTED line (`queue-routes` layer) chaining
+// dest → queue[0] → … — the active leg stays in the solid `routes-legs` layer. Landing auto-starts
+// the next queued leg server-side (part 1); test 3 exercises that chain end-to-end through the API.
+
+const SCALE = 1000; // fastest sim speed (v0.14.0 ladder top) — keeps flights to seconds of real time
+const HUB = 'EDDF'; // must match HUB_ICAO in lib/game/seed.ts
+const DEST = 'LEMD'; // Madrid–Barajas — the typical long leg (~10 s at scale 1000)
+const QUEUE = 'EHAM'; // Amsterdam — a third airport, distinct from hub and destination
+
+interface PlaneState {
+  id: string;
+  status: 'available' | 'flying';
+  locationIcao: string;
+  destIcao: string | null;
+  queue: string[];
+}
+
+interface PackageState {
+  id: string;
+  originIcao: string;
+  destIcao: string;
+  status: 'open' | 'loaded' | 'delivered' | 'expired' | 'abandoned';
+  planeId: string | null;
+}
+
+interface StateBody {
+  account: { cash: number; reputation: number };
+  simState: { clockMs: number; timeScale: number; paused: boolean };
+  planes: PlaneState[];
+  packages: PackageState[];
+}
+
+async function getState(page: Page): Promise<StateBody> {
+  const res = await page.request.get('/api/state');
+  expect(res.status()).toBe(200);
+  return (await res.json()) as StateBody;
+}
+
+async function postSim(page: Page, body: unknown) {
+  return page.request.post('/api/sim', { data: body });
+}
+
+// Set the time scale and VERIFY from the response that it stuck. ISS-041 also clears pause: a
+// landing pauses the sim, so any fast-forward after one must resume it or the clock stays frozen.
+async function setScale(page: Page, scale: number): Promise<void> {
+  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
+  expect(res.status()).toBe(200);
+  const body = (await res.json()) as { timeScale: number };
+  expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);
+}
+
+// Leave the live instance in a sane state for the other specs (scale 1, running).
+test.afterEach(async ({ page }) => {
+  const res = await postSim(page, { timeScale: 1, paused: false });
+  expect(res.status()).toBe(200);
+});
+
+// Test hook (FLIGHT_TEST_HOOKS=1): create an open package on a known route.
+async function createPackage(page: Page, fromIcao: string, toIcao: string): Promise<PackageState> {
+  const created = await page.request.post('/api/test/create-package', {
+    data: { originIcao: fromIcao, destIcao: toIcao, deadlineOffsetMs: 24 * 3_600_000 },
+  });
+  expect(created.status()).toBe(201);
+  return (await created.json()) as PackageState;
+}
+
+// Self-heal: let any in-flight leg finish, reposition plane-starter home via the API, and abandon
+// leftover cargo so every test starts from the canonical state even after an interrupted run.
+async function flyHomeViaApi(page: Page): Promise<void> {
+  let s = await getState(page);
+  let plane = s.planes.find((p) => p.id === 'plane-starter')!;
+  if (plane.status === 'flying' || plane.locationIcao !== HUB) {
+    // Fast-forward any leftover leg / repositioning flight (~20 s real time worst case at 1000×).
+    await setScale(page, SCALE);
+  }
+  if (plane.status === 'flying') {
+    // While flying, locationIcao stays at the DEPARTURE airport — re-read state after landing.
+    await expect
+      .poll(async () => ((await getState(page)).planes.find((p) => p.id === 'plane-starter')?.status ?? ''), {
+        timeout: 240_000,
+        message: 'waiting for an in-flight plane-starter to land',
+      })
+      .toBe('available');
+    s = await getState(page);
+    plane = s.planes.find((p) => p.id === 'plane-starter')!;
+  }
+  if (plane.locationIcao !== HUB) {
+    // ISS-041: the landing above paused the sim — setScale clears pause so the return leg fast-forwards.
+    await setScale(page, SCALE);
+    const res = await page.request.post(`/api/planes/${plane.id}/fly`, { data: { destIcao: HUB } });
+    expect(res.status()).toBe(200); // repositioning needs no package (v0.12.0 manual flight)
+    await expect
+      .poll(async () => ((await getState(page)).planes.find((p) => p.id === 'plane-starter')?.locationIcao ?? ''), {
+        timeout: 240_000,
+        message: 'waiting for plane-starter to land back at the hub',
+      })
+      .toBe(HUB);
+  }
+  // Abandon leftover loaded/expired packages (the baseline is captured AFTER this cleanup).
+  const s1 = await getState(page);
+  for (const pkg of s1.packages) {
+    if (pkg.planeId === 'plane-starter' && (pkg.status === 'loaded' || pkg.status === 'expired')) {
+      const res = await page.request.post(`/api/packages/${pkg.id}/abandon`);
+      expect(res.ok()).toBeTruthy();
+    }
+  }
+}
+
+async function waitForAirportCount(page: Page): Promise<void> {
+  const countEl = page.getByTestId('airport-count');
+  await expect.poll(async () => {
+    const text = (await countEl.textContent()) ?? '';
+    const m = text.match(/(\d+)/);
+    return m ? parseInt(m[1], 10) : -1;
+  }).toBeGreaterThan(0);
+}
+
+// Rendered features of the given layers in the current viewport, [] until the map exists.
+function renderedFeatures(
+  page: Page,
+  layers: string[],
+): Promise<Array<{ type?: unknown; id?: unknown; properties?: unknown; geometry?: unknown }>> {
+  return page.evaluate((ls: string[]) => {
+    const m = (window as any).__flightMap;
+    if (!m) return [];
+    try {
+      // queryRenderedFeatures returns live GeoJSONFeature instances whose `geometry` is a lazy
+      // PROTOTYPE getter — Playwright's evaluate serialization copies only own enumerable props, so
+      // geometry silently vanishes across the page boundary. Map to plain objects IN-PAGE (ORCHESTRATOR §6).
+      return (m.queryRenderedFeatures(undefined, { layers: ls }) as Array<{
+        type?: unknown;
+        id?: unknown;
+        properties?: unknown;
+        geometry?: unknown;
+      }>).map((f) => ({
+        type: f.type,
+        id: f.id,
+        properties: f.properties,
+        geometry: f.geometry,
+      }));
+    } catch {
+      return [];
+    }
+  }, layers);
+}
+
+// Fit the map so all given airports are in-viewport — queryRenderedFeatures only returns features
+// rendered inside the CURRENT viewport (same helper as e2e/hover.spec.ts).
+async function fitToAirports(page: Page, icaos: string[]): Promise<void> {
+  const fc = (await (await page.request.get('/api/airports')).json()) as {
+    features: Array<{ properties: { icao: string; lat: number; lon: number } }>;
+  };
+  const points = icaos.map((icao) => {
+    const f = fc.features.find((x) => x.properties.icao === icao);
+    if (!f) throw new Error(`airport ${icao} not found in /api/airports`);
+    return [f.properties.lon, f.properties.lat] as [number, number];
+  });
+  await page.evaluate((pts: [number, number][]) => {
+    const m = (window as any).__flightMap;
+    if (!m) throw new Error('map not ready');
+    const lons = pts.map((p) => p[0]);
+    const lats = pts.map((p) => p[1]);
+    // duration 0 → instant camera jump, no animation to wait out.
+    m.fitBounds(
+      [
+        [Math.min(...lons), Math.min(...lats)],
+        [Math.max(...lons), Math.max(...lats)],
+      ],
+      { padding: 40, duration: 0 },
+    );
+  }, points);
+  // Give the renderer a beat after the camera jump before asserting on rendered features.
+  await page.waitForTimeout(300);
+}
+
+// [lon, lat] of an airport from the same /api/airports dataset the map draws its lines from.
+async function airportLonLat(page: Page, icao: string): Promise<[number, number]> {
+  const fc = (await (await page.request.get('/api/airports')).json()) as {
+    features: Array<{ properties: { icao: string; lat: number; lon: number } }>;
+  };
+  const f = fc.features.find((x) => x.properties.icao === icao);
+  if (!f) throw new Error(`airport ${icao} not found in /api/airports`);
+  return [f.properties.lon, f.properties.lat];
+}
+
+// MapLibre stores GeoJSON geometry in per-tile INTEGER grids and clips long lines across tiles, so
+// queryRenderedFeatures returns ONE FEATURE PER TILE the line crosses with coordinates quantized to
+// the grid — check endpoints ACROSS all segments with an EPS (same pattern as expectHoverRoute in
+// e2e/hover.spec.ts). ~5 km: above worst-case quantization at any zoom, below the distance between
+// any two EU airports.
+const QUEUE_ROUTE_EPS_DEG = 0.05;
+
+test.describe.configure({ mode: 'serial' }); // shared live DB — order matters within this file
+
+test('queue display + cancel via UI (ISS-043 part 2)', async ({ page }) => {
+  test.setTimeout(300_000); // self-heal can take minutes after an interrupted run
+  await flyHomeViaApi(page); // deterministic: the starter sits grounded at EDDF
+
+  // Full tank before departure — keeps the long EDDF→LEMD leg fuel-feasible (same as tests 2 & 3).
+  const refuel = await page.request.post('/api/planes/plane-starter/refuel');
+  expect(refuel.status()).toBe(200);
+
+  const pkg = await createPackage(page, HUB, DEST);
+
+  await page.goto('/');
+  await waitForAirportCount(page);
+
+  // LOAD via the UI (right-pane job list) — the starter is grounded at the package's origin.
+  const loadBtn = page.getByTestId(`load-${pkg.id}`);
+  await expect(loadBtn, 'Load button enabled for a package at the hub').toBeEnabled({ timeout: 15_000 });
+  await loadBtn.click();
+  const onboardRow = page.getByTestId(`onboard-package-${pkg.id}`);
+  await expect(onboardRow, 'loaded package appears in the On board section').toBeVisible({ timeout: 15_000 });
+
+  // LeftPane's own /api/airports fetch populates the queue-add select — wait for it.
+  const addSelect = page.getByTestId('queue-add-dest');
+  await expect(addSelect.locator(`option[value="${QUEUE}"]`)).toHaveCount(1, { timeout: 15_000 });
+
+  // START leg 1 via the UI (fly-to button in the on-board block).
+  const flyBtn = page.getByTestId(`fly-to-${pkg.id}`);
+  await expect(flyBtn).toBeEnabled();
+  await flyBtn.click();
+  // The click fires the fly POST asynchronously — poll until it took effect server-side, then FREEZE
+  // immediately: at scale 1000 (left over from self-heal) the ~10 s leg would otherwise land under us.
+  await expect.poll(async () => {
+    const p = (await getState(page)).planes.find((x) => x.id === 'plane-starter');
+    return !!p && p.status === 'flying' && p.destIcao === DEST;
+  }, { timeout: 15_000, message: 'waiting for the fly click to take effect (status "flying" + dest set)' }).toBe(true);
+  await postSim(page, { paused: true }); // pause-sim pattern: deterministic window for UI clicks
+
+  // ADD a leg to the queue via the UI. The button is disabled until an airport is selected…
+  const addButton = page.getByTestId('queue-add');
+  await expect(addButton).toBeDisabled();
+  await addSelect.selectOption(QUEUE);
+  await expect(addButton).toBeEnabled();
+  await addButton.click();
+
+  // …and the new leg appears as queue-leg-0 with its destination.
+  const legRow = page.getByTestId('queue-leg-0');
+  await expect(legRow, 'the queued leg appears in the Queue sub-section').toContainText(QUEUE, { timeout: 15_000 });
+
+  // CANCEL it via the UI and assert it's gone.
+  await page.getByTestId('queue-cancel-0').click();
+  await expect(page.getByTestId('queue-leg-0'), 'the cancelled leg is removed from the queue').toHaveCount(0, { timeout: 15_000 });
+
+  // Cleanup: resume + fast-forward to arrival at DEST (empty queue → plain landing), then fly home.
+  await setScale(page, SCALE);
+  await expect.poll(async () => {
+    const p = (await getState(page)).planes.find((x) => x.id === 'plane-starter');
+    return !!p && p.status === 'available' && p.locationIcao === DEST;
+  }, { timeout: 120_000, message: `waiting for plane-starter to land at ${DEST}` }).toBe(true);
+
+  // ISS-041: the arrival above paused the sim — setScale clears pause for the return leg.
+  await setScale(page, SCALE);
+  const home = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
+  expect(home.status()).toBe(200);
+  await expect.poll(async () => ((await getState(page)).planes.find((p) => p.id === 'plane-starter')?.locationIcao ?? ''), {
+    timeout: 120_000,
+    message: 'waiting for plane-starter to land back at the hub',
+  }).toBe(HUB);
+});
+
+test('dotted queue line renders the queued path on the map (ISS-043 part 2)', async ({ page }) => {
+  test.setTimeout(300_000); // self-heal + one flight at scale 1000 + fly-home cleanup
+  await flyHomeViaApi(page);
+
+  // Full tank before departure — keeps the state canonical for whatever the cleanup does.
+  const refuel = await page.request.post('/api/planes/plane-starter/refuel');
+  expect(refuel.status()).toBe(200);
+
+  // Load + queue + fly via the API: a package EDDF→LEMD, one queued leg LEMD→EHAM (works while
+  // grounded — part 1), then start leg 1. The dotted line must show ONLY dest → queue[0].
+  const pkg = await createPackage(page, HUB, DEST);
+  const load = await page.request.post(`/api/packages/${pkg.id}/load`, { data: { planeId: 'plane-starter' } });
+  expect(load.status()).toBe(200);
+  const queueRes = await page.request.post('/api/planes/plane-starter/queue', { data: { destIcao: QUEUE } });
+  expect(queueRes.status()).toBe(200);
+  const flyRes = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: DEST } });
+  expect(flyRes.status()).toBe(200);
+  // The endpoint's OWN post-action snapshot already shows the plane flying — no poll race.
+  const flyBody = (await flyRes.json()) as StateBody;
+  expect(flyBody.planes.find((p) => p.id === 'plane-starter')?.status).toBe('flying');
+
+  // Freeze mid-flight so the ~10 s leg can't land under us while we assert.
+  await postSim(page, { paused: true });
+
+  await page.goto('/');
+  await waitForAirportCount(page);
+  // All line endpoints must be in-viewport for queryRenderedFeatures to see them.
+  await fitToAirports(page, [DEST, QUEUE]);
+
+  const destLL = await airportLonLat(page, DEST);
+  const queueLL = await airportLonLat(page, QUEUE);
+  const hubLL = await airportLonLat(page, HUB);
+  const near = (a: [number, number], b: [number, number]) =>
+    Math.abs(a[0] - b[0]) <= QUEUE_ROUTE_EPS_DEG && Math.abs(a[1] - b[1]) <= QUEUE_ROUTE_EPS_DEG;
+
+  await expect.poll(async () => {
+    const feats = (await renderedFeatures(page, ['queue-routes'])) as Array<{
+      properties?: Record<string, unknown>;
+      geometry?: { type: string; coordinates: [number, number][] };
+    }>;
+    // Filter to real LineString segments — keeps this poll callback total (a throw inside
+    // expect.poll fails the test instantly instead of retrying). "None yet" → keep polling.
+    const segs = feats.filter(
+      (f): f is { properties?: Record<string, unknown>; geometry: { type: 'LineString'; coordinates: [number, number][] } } =>
+        !!f.geometry && f.geometry.type === 'LineString' && Array.isArray(f.geometry.coordinates) && f.geometry.coordinates.length >= 2,
+    );
+    if (!segs.length) return false;
+    // The line may be clipped into several per-tile segments — check the endpoints across all of them:
+    // some segment STARTS within EPS of DEST (the active leg's destination, NOT the plane's origin)…
+    const startsAtDest = segs.some((f) => near(f.geometry.coordinates[0], destLL));
+    // …and some ENDS within EPS of the queued airport.
+    const endsAtQueue = segs.some((f) => {
+      const c = f.geometry.coordinates;
+      return near(c[c.length - 1], queueLL);
+    });
+    // The active leg (HUB→DEST) must NOT be in this layer — no segment may start at the hub.
+    const noneStartsAtHub = !segs.some((f) => near(f.geometry.coordinates[0], hubLL));
+    // Every rendered feature belongs to plane-starter (the only queued plane).
+    const ownedByStarter = feats.every((f) => f.properties?.planeId === 'plane-starter');
+    return startsAtDest && endsAtQueue && noneStartsAtHub && ownedByStarter;
+  }, { timeout: 15_000, message: `waiting for the dotted queue line ${DEST} → ${QUEUE}` }).toBe(true);
+
+  // Cleanup: cancel the queued leg (so landing at DEST is a plain grounding), resume + fast-forward
+  // to arrival, then fly home.
+  const cancelRes = await page.request.post('/api/planes/plane-starter/queue/cancel', { data: { index: 0 } });
+  expect(cancelRes.status()).toBe(200);
+  await setScale(page, SCALE);
+  await expect.poll(async () => {
+    const p = (await getState(page)).planes.find((x) => x.id === 'plane-starter');
+    return !!p && p.status === 'available' && p.locationIcao === DEST;
+  }, { timeout: 120_000, message: `waiting for plane-starter to land at ${DEST}` }).toBe(true);
+
+  // ISS-041: the arrival above paused the sim — setScale clears pause for the return leg.
+  await setScale(page, SCALE);
+  const home = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
+  expect(home.status()).toBe(200);
+  await expect.poll(async () => ((await getState(page)).planes.find((p) => p.id === 'plane-starter')?.locationIcao ?? ''), {
+    timeout: 120_000,
+    message: 'waiting for plane-starter to land back at the hub',
+  }).toBe(HUB);
+});
+
+test('landing auto-starts the next queued leg (ISS-043 chain end-to-end)', async ({ page }) => {
+  test.setTimeout(300_000); // self-heal + two chained legs at scale 1000
+  await flyHomeViaApi(page);
+
+  // Full tank so fuel covers the chained return leg (same feasibility rule as /fly).
+  const refuel = await page.request.post('/api/planes/plane-starter/refuel');
+  expect(refuel.status()).toBe(200);
+
+  // Package EDDF→LEMD + a queued return leg LEMD→EDDF, then start leg 1.
+  const pkg = await createPackage(page, HUB, DEST);
+  const load = await page.request.post(`/api/packages/${pkg.id}/load`, { data: { planeId: 'plane-starter' } });
+  expect(load.status()).toBe(200);
+  const queueRes = await page.request.post('/api/planes/plane-starter/queue', { data: { destIcao: HUB } });
+  expect(queueRes.status()).toBe(200);
+  const flyRes = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: DEST } });
+  expect(flyRes.status()).toBe(200);
+
+  // Fast-forward (also clears any pause). On landing at DEST the server must AUTO-START the queued
+  // return leg — no manual dispatch. The chained state persists for the whole ~10 s return leg, so a
+  // poll can't miss it: status 'flying' with destIcao = the first (only) queued ICAO.
+  await setScale(page, SCALE);
+  await expect.poll(async () => {
+    const p = (await getState(page)).planes.find((x) => x.id === 'plane-starter');
+    return !!p && p.status === 'flying' && p.destIcao === HUB;
+  }, { timeout: 120_000, message: `waiting for the auto-chained leg ${DEST} → ${HUB} to start` }).toBe(true);
+
+  // Cargo delivery ran BEFORE chaining (part 1 ordering) — the package is already delivered.
+  const s = await getState(page);
+  expect(s.packages.find((x) => x.id === pkg.id)?.status).toBe('delivered');
+
+  // Let the chained leg finish: it lands back at the hub, leaving the canonical onboarding state.
+  await expect.poll(async () => {
+    const p = (await getState(page)).planes.find((x) => x.id === 'plane-starter');
+    return !!p && p.status === 'available' && p.locationIcao === HUB;
+  }, { timeout: 120_000, message: `waiting for the chained leg to land back at ${HUB}` }).toBe(true);
+});

e2e/relocation.spec.ts

@@ -31,8 +31,10 @@ async function postSim(page: Page, body: Record<string, unknown>): Promise<void>
 
 // Set the time scale and VERIFY from the response that it stuck — if something external ever
 // resets the live instance's controls mid-test, fail loudly here instead of timing out later.
+// ISS-041 also clears pause: a landing pauses the sim, so any fast-forward after one must
+// resume it or the clock stays frozen and the next wait hangs.
 async function setScale(page: Page, scale: number): Promise<void> {
-  const res = await page.request.post('/api/sim', { data: { timeScale: scale } });
+  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
   expect(res.status()).toBe(200);
   const body = (await res.json()) as { timeScale: number };
   expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);
@@ -72,7 +74,7 @@ async function flyHomeViaApi(page: Page): Promise<void> {
     plane = s.planes.find((p) => p.id === 'plane-starter')!;
   }
   if (plane.locationIcao !== HUB) {
-    // ISS-011: the landing above auto-slown the sim to 1× — re-set SCALE so the return leg
+    // ISS-041: the landing above paused the sim — setScale clears pause so the return leg
     // fast-forwards instead of taking real-time hours.
     await setScale(page, SCALE);
     const res = await page.request.post(`/api/planes/${plane.id}/fly`, { data: { destIcao: HUB } });

e2e/right-pane.spec.ts

@@ -5,8 +5,9 @@ import { expect, test } from '@playwright/test';
 // names/reward/deadline and Load (UI click) binds one to the starter; the on-board list
 // (moved to the left pane in v0.20.0, ISS-021) shows loaded packages with fly-to-destination +
 // abandon buttons (penalty preview from the same
-// formula as the server); flying planes show their current leg; market buy/sell/refuel previews
-// match the catalog + economy constants exposed in /api/state. Packages are created via
+// formula as the server); flying planes show their current leg; market buy/sell previews match
+// the catalog + economy constants exposed in /api/state, and the Refuel-to-full row (moved to the
+// left pane in v0.23.0, ISS-035) deducts exactly its cost. Packages are created via
 // POST /api/test/create-package (FLIGHT_TEST_HOOKS=1), same pattern as e2e/actions.spec.ts.
 
 const SCALE = 1000; // fastest sim speed (v0.14.0 ladder top) — keeps flights to seconds of real time
@@ -41,7 +42,7 @@ interface CatalogEntry {
   burnPerKm: number;
   emptyWeightKg: number; // v0.16.0 weighted burn input
   speedKmh: number;
-  capacity: number;
+  maxPayloadKg: number; // v0.27.0 — replaces the v0.12.0 slot capacity
 }
 
 interface StateBody {
@@ -68,9 +69,10 @@ async function postSim(page: Page, body: unknown) {
 }
 
 // Set the time scale and VERIFY from the response that it stuck — a silent reset would
-// otherwise surface as an unexplained landing-wait timeout.
+// otherwise surface as an unexplained landing-wait timeout. ISS-041 also clears pause: a
+// landing pauses the sim, so any fast-forward after one must resume it or the clock stays frozen.
 async function setScale(page: Page, scale: number): Promise<void> {
-  const res = await page.request.post('/api/sim', { data: { timeScale: scale } });
+  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
   expect(res.status()).toBe(200);
   const body = (await res.json()) as { timeScale: number };
   expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);
@@ -175,7 +177,7 @@ async function flyHomeViaApi(page: Page): Promise<void> {
       .toBe(true);
   }
   if (starter.locationIcao !== HUB) {
-    // ISS-011: the landing above auto-slown the sim to 1× — re-set SCALE so the return leg
+    // ISS-041: the landing above paused the sim — setScale clears pause so the return leg
     // fast-forwards instead of taking real-time hours.
     await setScale(page, SCALE);
     const res = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
@@ -288,7 +290,7 @@ test('on-board list: fly-to-destination + abandon with penalty preview; flying p
   await expect(onboardRow).not.toBeVisible({ timeout: 15_000 });
 
   // Restore: fly home so the live instance stays in its onboarding state for the next run.
-  // ISS-011: the arrival above auto-slown the sim to 1×, so re-set SCALE for this leg.
+  // ISS-041: the arrival above paused the sim, so re-set SCALE for this leg (setScale clears pause).
   await setScale(page, SCALE);
   const homeRes = await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } });
   expect(homeRes.status()).toBe(200);
@@ -300,14 +302,14 @@ test('on-board list: fly-to-destination + abandon with penalty preview; flying p
     .toBe(true);
 });
 
-test('market buy/sell/refuel render with previews from the catalog in /api/state; refuel deducts exactly', async ({ page }) => {
+test('market buy/sell render with previews from the catalog in /api/state; left-pane Refuel deducts exactly', async ({ page }) => {
   test.setTimeout(300_000); // self-heal can take minutes after an interrupted run
   await flyHomeViaApi(page); // grounded starter at EDDF (tank partial after the previous test's flight)
 
   const body = await getState(page); // authoritative catalog + economy constants (v0.10.0)
   expect(body.catalog.length).toBeGreaterThan(0);
   const entry = body.catalog.find((e) => e.model === 'atr72')!;
-  expect(entry.capacity).toBe(6); // v0.12.0 slot capacity exposed in the snapshot
+  expect(entry.maxPayloadKg).toBe(4_800); // ATR 72-600 max payload (lib/game/catalog.ts)
 
   await page.goto('/');
   // Buy: the model picker lists the catalog entry and the price preview is its full price.
@@ -325,6 +327,9 @@ test('market buy/sell/refuel render with previews from the catalog in /api/state
   const payout = Math.round(entry.price * body.sellFraction * 100) / 100;
   await expect(page.getByTestId('market-sell-payout')).toContainText(eur(payout));
 
+  // ISS-035 (v0.23.0): the Refuel-to-full row now lives in the LEFT pane next to Relocate — same global testids.
+  await expect(page.getByTestId('left-pane').getByTestId('market-refuel')).toBeVisible({ timeout: 15_000 });
+
   // Refuel through the pane: the flight genuinely burned fuel…
   if (starter.fuel < starter.maxFuel) {
     const expectedCost = Math.round((starter.maxFuel - starter.fuel) * body.fuelPricePerL * 100) / 100;
@@ -348,7 +353,7 @@ test('market buy/sell/refuel render with previews from the catalog in /api/state
   }
 });
 
-test('on-board row Refuel tops up just enough for the package leg; market button says "Refuel to full"', async ({ page }) => {
+test('on-board row Refuel tops up just enough for the package leg; left-pane button says "Refuel to full"', async ({ page }) => {
   test.setTimeout(300_000); // self-heal + one long flight each way at scale 1000
   await flyHomeViaApi(page);
 
@@ -403,12 +408,12 @@ test('on-board row Refuel tops up just enough for the package leg; market button
   expect(post.account.cash).toBeCloseTo(cashBefore - expectedCost, 6);
   expect(post.planes.find((p) => p.id === 'plane-starter')!.fuel).toBeCloseTo(fuelBefore + liters, 6);
 
-  // Market row: the fill-up button is labeled "Refuel to full" (testid unchanged).
+  // Left pane (moved from the market in v0.23.0, ISS-035): the fill-up button is labeled "Refuel to full" (testid unchanged).
   await expect(page.getByTestId('market-refuel')).toHaveText('Refuel to full');
 
   // Restore: fly home — pkg2's destination IS the hub, so it delivers on arrival. The tank holds
-  // exactly the leg requirement, so this also proves "just enough" is enough. ISS-011: the far-end
-  // arrival above auto-slown the sim to 1×, so re-set SCALE for this leg.
+  // exactly the leg requirement, so this also proves "just enough" is enough. ISS-041: the far-end
+  // arrival above paused the sim, so re-set SCALE for this leg (setScale clears pause).
   await setScale(page, SCALE);
   expect((await page.request.post('/api/planes/plane-starter/fly', { data: { destIcao: HUB } })).status()).toBe(200);
   await expect

e2e/state.spec.ts

@@ -36,7 +36,7 @@ test('GET /api/state returns a seeded snapshot', async ({ page }) => {
 
   expect(Array.isArray(body.packages)).toBe(true);
   expect(body.packages.length).toBeGreaterThan(0);
-  for (const key of ['id', 'originIcao', 'destIcao', 'reward', 'cargoType', 'deadlineSimTime', 'status']) {
+  for (const key of ['id', 'originIcao', 'destIcao', 'reward', 'cargoType', 'weightKg', 'deadlineSimTime', 'status']) {
     expect(body.packages[0], `package.${key}`).toHaveProperty(key);
   }
 });

e2e/toasts.spec.ts

@@ -1,9 +1,10 @@
 import type { Page } from '@playwright/test';
 import { expect, test } from '@playwright/test';
 
-// v0.17.0 — ISS-008: action errors surface as bottom-right toasts (in addition to the inline
-// pane error) and game events appear as info toasts via snapshot diffing; the left-pane Time
-// section offers an explicit "Enable notifications" opt-in for browser notifications.
+// v0.17.0 — ISS-008: action errors surface as toasts at the map's right edge (clear of the
+// right pane, in addition to the inline pane error) and game events appear as info toasts via
+// snapshot diffing; the left-pane Time section offers an explicit "Enable notifications" opt-in
+// for browser notifications.
 
 interface CatalogEntry {
   model: string;
@@ -22,7 +23,7 @@ async function getState(page: Page): Promise<StateBody> {
   return (await res.json()) as StateBody;
 }
 
-test('failed actions toast bottom-right (inline error stays) and the Time section offers a notifications opt-in', async ({ page }) => {
+test('failed actions toast at the map right edge, clear of the right pane (inline error stays), and the Time section offers a notifications opt-in', async ({ page }) => {
   await page.goto('/');
   const buyModel = page.getByTestId('market-buy-model');
   await expect(buyModel, 'the market section renders once the first snapshot lands').toBeVisible({ timeout: 15_000 });
@@ -38,7 +39,7 @@ test('failed actions toast bottom-right (inline error stays) and the Time sectio
 
     // The toast appears with the server's error message and the error variant class…
     const toast = page.locator('[data-testid="toast"]').filter({ hasText: /insufficient funds/i });
-    await expect(toast, 'the error toast appears bottom-right').toBeVisible({ timeout: 10_000 });
+    await expect(toast, 'the error toast appears at the map right edge').toBeVisible({ timeout: 10_000 });
     await expect(toast).toHaveClass(/toast-error/);
 
     // …and the inline pane error still shows (both surfaces by design). It auto-clears on the

lib/db/client.ts

@@ -30,7 +30,8 @@ CREATE TABLE IF NOT EXISTS planes (
   dest_icao TEXT,
   lat REAL NOT NULL,
   lon REAL NOT NULL,
-  departure_sim_time INTEGER
+  departure_sim_time INTEGER,
+  queue TEXT NOT NULL DEFAULT '[]'
 );
 CREATE TABLE IF NOT EXISTS packages (
   id TEXT PRIMARY KEY NOT NULL,
@@ -39,6 +40,7 @@ CREATE TABLE IF NOT EXISTS packages (
   reward REAL NOT NULL,
   cargo_type TEXT NOT NULL,
   cargo_count INTEGER NOT NULL,
+  weight_kg REAL NOT NULL DEFAULT 2000,
   deadline_sim_time INTEGER NOT NULL,
   status TEXT NOT NULL,
   plane_id TEXT,
@@ -72,6 +74,14 @@ function migrateColumns(raw: RawSqlJsDatabase): void {
   if (!cols('planes').has('dest_icao')) {
     raw.exec('ALTER TABLE planes ADD COLUMN dest_icao TEXT');
   }
+  // v0.25.0 (ISS-043): the flight queue — ordered JSON array of not-yet-started leg ICACs.
+  if (!cols('planes').has('queue')) {
+    raw.exec(`ALTER TABLE planes ADD COLUMN queue TEXT NOT NULL DEFAULT '[]'`);
+  }
+  // v0.27.0 (ISS-045): package weight — pre-existing rows backfill to a mid-range default.
+  if (!cols('packages').has('weight_kg')) {
+    raw.exec('ALTER TABLE packages ADD COLUMN weight_kg REAL NOT NULL DEFAULT 2000');
+  }
 }
 
 // v0.12.0 one-time migration: contracts world → packages world. Detected by the
@@ -159,7 +169,9 @@ async function seedEmpty(instance: GameDb): Promise<void> {
   const rng = mulberry32(randomInt(0, 2 ** 31));
   const data = buildSeed({ airports, rng, nowMs: Date.now() });
 
-  await instance.db.insert(schema.planes).values(data.plane);
+  // SeedPlane.queue is a string[]; the column stores it as JSON text.
+  const { queue, ...planeCols } = data.plane;
+  await instance.db.insert(schema.planes).values({ ...planeCols, queue: JSON.stringify(queue ?? []) });
   await instance.db.insert(schema.packages).values(data.packages);
   await instance.db.insert(schema.account).values(data.account);
   await instance.db.insert(schema.simState).values(data.simState);

lib/db/schema.ts

@@ -20,6 +20,10 @@ export const planes = sqliteTable('planes', {
   // flying, `fuel` is frozen at its departure value — live position/fuel are pure
   // functions of the clock (lib/sim/movement.ts), recomputed on read.
   departureSimTime: integer('departure_sim_time'),
+  // Queue of upcoming legs NOT yet started (v0.25.0, ISS-043) — ordered JSON array
+  // of ICAO strings ('[]' when empty). The ACTIVE leg stays destIcao +
+  // departureSimTime; on landing the engine auto-chains queue[0] if fuel covers it.
+  queue: text('queue').notNull().default('[]'),
 });
 
 // Cargo packages (v0.12.0) replace the old contracts table end-to-end: a package
@@ -33,6 +37,9 @@ export const packages = sqliteTable('packages', {
   reward: real('reward').notNull(),
   cargoType: text('cargo_type').notNull(),
   cargoCount: integer('cargo_count').notNull(),
+  // Package weight in kg (v0.27.0, ISS-045) — drives load validation (plane payload)
+  // and the per-kg part of the payout. Pre-existing rows backfill to the default.
+  weightKg: real('weight_kg').notNull().default(2000),
   deadlineSimTime: integer('deadline_sim_time').notNull(),
   // 'expired' = an open OR loaded package whose deadline passed on a tick. Loaded
   // expired packages keep occupying their slot, deliver no reward, and abandon free.

lib/deriveEvents.test.ts

@@ -6,7 +6,7 @@ import { diffSnapshots } from './deriveEvents';
 // feature, unit-tested in node like advanceSimClock/fetchState.
 
 const CATALOG = [
-  { model: 'atr72', label: 'ATR 72-600', price: 200_000, maxFuel: 6300, burnPerKm: 1.75, emptyWeightKg: 9300, speedKmh: 510, capacity: 6 },
+  { model: 'atr72', label: 'ATR 72-600', price: 200_000, maxFuel: 6300, burnPerKm: 1.75, emptyWeightKg: 9300, speedKmh: 510, maxPayloadKg: 4800 },
 ];
 
 const basePlane = (id: string): PlaneState => ({
@@ -22,6 +22,7 @@ const basePlane = (id: string): PlaneState => ({
   departureSimTime: null,
   lat: 50.03,
   lon: 8.56,
+  queue: [],
 });
 
 const basePackage = (id: string): PackageState => ({
@@ -33,6 +34,7 @@ const basePackage = (id: string): PackageState => ({
   reward: 1234.5,
   cargoType: 'mail',
   cargoCount: 2,
+  weightKg: 600,
   deadlineSimTime: 0,
   status: 'open',
   planeId: null,

lib/game/actions.test.ts

@@ -13,9 +13,11 @@ import { HUB_ICAO } from './seed';
 import {
   abandonPackage,
   buyPlane,
+  cancelQueuedLeg,
   flyPlane,
   GameActionError,
   loadPackage,
+  queueLeg,
   refuelPlane,
   sellPlane,
 } from './actions';
@@ -125,27 +127,27 @@ describe('loadPackage', () => {
     await expectActionError(loadPackage(inst, 'p-open', 'plane-starter'), 409, /at LEMD/);
   });
 
-  it('rejects loading when the plane has no free slot (capacity from catalog)', async () => {
+  it('rejects loading when the plane has no payload room (maxPayloadKg from catalog)', async () => {
     const inst = await freshDb('load-full.db');
-    await insertOpenPackage(inst, 'p-new');
-    // Fill all atr72 slots with loaded cargo…
-    for (let i = 0; i < PLANE_TYPES.atr72.capacity; i++) {
-      await insertOpenPackage(inst, `p-fill-${i}`, { status: 'loaded', planeId: 'plane-starter' });
+    await insertOpenPackage(inst, 'p-new', { weightKg: 1_000 });
+    // Fill past maxPayloadKg with loaded cargo…
+    const chunk = Math.floor(PLANE_TYPES.atr72.maxPayloadKg / 3) + 1; // 3 chunks > max
+    for (let i = 0; i < 3; i++) {
+      await insertOpenPackage(inst, `p-fill-${i}`, { status: 'loaded', planeId: 'plane-starter', weightKg: chunk });
     }
 
-    await expectActionError(loadPackage(inst, 'p-new', 'plane-starter'), 409, /no free slots/i);
+    await expectActionError(loadPackage(inst, 'p-new', 'plane-starter'), 409, /no payload room/i);
   });
 
-  it('counts expired packages as occupying their slot too', async () => {
+  it('counts expired packages as occupying their payload too', async () => {
     const inst = await freshDb('load-expiredslot.db');
-    await insertOpenPackage(inst, 'p-new');
-    // capacity − 1 loaded + 1 expired = full.
-    for (let i = 0; i < PLANE_TYPES.atr72.capacity - 1; i++) {
-      await insertOpenPackage(inst, `p-fill-${i}`, { status: 'loaded', planeId: 'plane-starter' });
-    }
-    await insertOpenPackage(inst, 'p-expired-slot', { status: 'expired', planeId: 'plane-starter' });
+    await insertOpenPackage(inst, 'p-new', { weightKg: 1_000 });
+    // Half + half (expired) leaves no room — each alone would fit.
+    const half = Math.floor(PLANE_TYPES.atr72.maxPayloadKg / 2) + 1;
+    await insertOpenPackage(inst, 'p-loaded-half', { status: 'loaded', planeId: 'plane-starter', weightKg: half });
+    await insertOpenPackage(inst, 'p-expired-slot', { status: 'expired', planeId: 'plane-starter', weightKg: half });
 
-    await expectActionError(loadPackage(inst, 'p-new', 'plane-starter'), 409, /no free slots/i);
+    await expectActionError(loadPackage(inst, 'p-new', 'plane-starter'), 409, /no payload room/i);
   });
 });
 
@@ -167,6 +169,18 @@ describe('flyPlane', () => {
     expect(plane.fuel).toBe(PLANE_TYPES.atr72.maxFuel);
   });
 
+  it('clears paused on dispatch (ISS-041) — speed is left untouched', async () => {
+    const inst = await freshDb('fly-unpause.db');
+    // The last landing pauses the sim at whatever scale was in use.
+    await inst.db.update(schema.simState).set({ paused: true, timeScale: 250 });
+
+    await flyPlane(inst, 'plane-starter', 'LEMD');
+
+    const sim = (await inst.db.select().from(schema.simState))[0];
+    expect(sim.paused).toBe(false); // dispatch auto-resumes…
+    expect(sim.timeScale).toBe(250); // …with the stored speed preserved
+  });
+
   it('rejects a flying plane with 409', async () => {
     const inst = await freshDb('fly-flying.db');
     await inst.db.update(schema.planes)
@@ -194,6 +208,75 @@ describe('flyPlane', () => {
   });
 });
 
+describe('queueLeg (v0.25.0, ISS-043)', () => {
+  it('appends legs to the queue in order and persists them as JSON', async () => {
+    const inst = await freshDb('qleg-ok.db');
+
+    await queueLeg(inst, 'plane-starter', 'LEMD');
+    let plane = (await inst.db.select().from(schema.planes))[0];
+    expect(JSON.parse(plane.queue)).toEqual(['LEMD']);
+
+    await queueLeg(inst, 'plane-starter', 'EHAM'); // pre-building a route
+    plane = (await inst.db.select().from(schema.planes))[0];
+    expect(JSON.parse(plane.queue)).toEqual(['LEMD', 'EHAM']); // order preserved
+  });
+
+  it('works on a flying plane too — the active leg is untouched, nothing auto-starts', async () => {
+    const inst = await freshDb('qleg-flying.db');
+    await inst.db.update(schema.planes)
+      .set({ status: 'flying', departureSimTime: T0, destIcao: 'LEMD' })
+      .where(eq(schema.planes.id, 'plane-starter'));
+
+    await queueLeg(inst, 'plane-starter', 'EHAM');
+
+    const plane = (await inst.db.select().from(schema.planes))[0];
+    expect(plane.status).toBe('flying'); // still on its active leg…
+    expect(plane.destIcao).toBe('LEMD'); // …unchanged — queueing never starts a flight
+    expect(JSON.parse(plane.queue)).toEqual(['EHAM']);
+  });
+
+  it('rejects an unknown plane id with 404', async () => {
+    const inst = await freshDb('qleg-ghost.db');
+    await expectActionError(queueLeg(inst, 'ghost', 'LEMD'), 404);
+  });
+
+  it('rejects an ICAO not in the airport dataset with 400', async () => {
+    const inst = await freshDb('qleg-unknownicao.db');
+    await expectActionError(queueLeg(inst, 'plane-starter', 'ZZZZ'), 400, /unknown airport/);
+  });
+});
+
+describe('cancelQueuedLeg (v0.25.0, ISS-043)', () => {
+  it('removes the leg at the given index and keeps the rest in order', async () => {
+    const inst = await freshDb('qcancel-ok.db');
+    await queueLeg(inst, 'plane-starter', 'LEMD');
+    await queueLeg(inst, 'plane-starter', 'EHAM');
+    await queueLeg(inst, 'plane-starter', 'EDDV');
+
+    await cancelQueuedLeg(inst, 'plane-starter', 1); // drop EHAM (the middle leg)
+
+    const plane = (await inst.db.select().from(schema.planes))[0];
+    expect(JSON.parse(plane.queue)).toEqual(['LEMD', 'EDDV']);
+  });
+
+  it('rejects an out-of-range index with 400', async () => {
+    const inst = await freshDb('qcancel-oob.db');
+    await queueLeg(inst, 'plane-starter', 'LEMD'); // one leg → only index 0 is valid
+    await expectActionError(cancelQueuedLeg(inst, 'plane-starter', 1), 400);
+    await expectActionError(cancelQueuedLeg(inst, 'plane-starter', -1), 400);
+  });
+
+  it('rejects cancelling from an empty queue with 400', async () => {
+    const inst = await freshDb('qcancel-empty.db'); // seeded starter has no queued legs
+    await expectActionError(cancelQueuedLeg(inst, 'plane-starter', 0), 400);
+  });
+
+  it('rejects an unknown plane id with 404', async () => {
+    const inst = await freshDb('qcancel-ghost.db');
+    await expectActionError(cancelQueuedLeg(inst, 'ghost', 0), 404);
+  });
+});
+
 describe('abandonPackage', () => {
   // A loaded package created at T0 with a 10h window; the seeded sim clock is T0.
   const REWARD = 1_000;

lib/game/actions.ts

@@ -6,7 +6,7 @@ import { loadAirportsGeoJson } from '@/lib/airports';
 import { haversineKm } from '@/lib/geo';
 import { requiredFuelFor } from '@/lib/sim/movement';
 import { runAction } from '@/lib/sim/engine';
-import { getStateSnapshot } from './state';
+import { getStateSnapshot, parseIcaoQueue } from './state';
 import { FUEL_PRICE_PER_L, PLANE_TYPES, SELL_FRACTION } from './catalog';
 import { abandonPenalty } from './penalty';
 import { HUB_ICAO } from './seed';
@@ -20,7 +20,7 @@ import { HUB_ICAO } from './seed';
 // GameActionError carrying the HTTP status:
 //   404 — unknown entity id
 //   409 — valid ids but the current state forbids the action (wrong package/plane
-//         status, plane not at origin, no free slot, insufficient fuel/funds, last plane)
+//         status, plane not at origin, no payload room, insufficient fuel/funds, last plane)
 //   400 — bad input that isn't an existence problem (unknown airport/model)
 
 export class GameActionError extends Error {
@@ -43,8 +43,9 @@ async function airportByIcao(icao: string): Promise<{ icao: string; lat: number;
 // --- Load (POST /api/packages/:id/load {planeId}) ---
 
 // open → loaded, bound to the plane. The plane must be GROUNDED at the package's
-// origin with a free slot (slots = packages 'loaded' or 'expired' on it — expired
-// cargo keeps occupying its space until delivered/abandoned).
+// origin with enough payload room (v0.27.0: used kg = sum of weightKg over packages
+// 'loaded' or 'expired' on it — expired cargo keeps occupying its space until
+// delivered/abandoned).
 export async function loadPackage(inst: GameDb, packageId: string, planeId: string): Promise<void> {
   const [pkgRows, planeRows] = await Promise.all([
     inst.db.select().from(schema.packages).where(eq(schema.packages.id, packageId)),
@@ -69,13 +70,12 @@ export async function loadPackage(inst: GameDb, packageId: string, planeId: stri
 
   const type = PLANE_TYPES[plane.model];
   if (!type) throw new Error(`unknown plane model ${plane.model}`); // → 500, cannot happen for seeded data
-  const occupied = (
-    await inst.db.select().from(schema.packages).where(
-      and(inArray(schema.packages.status, ['loaded', 'expired']), eq(schema.packages.planeId, plane.id)),
-    )
-  ).length;
-  if (occupied >= type.capacity) {
-    throw new GameActionError(409, `no free slots: the ${type.name} carries ${occupied}/${type.capacity} packages`);
+  const occupied = await inst.db.select({ weightKg: schema.packages.weightKg }).from(schema.packages).where(
+    and(inArray(schema.packages.status, ['loaded', 'expired']), eq(schema.packages.planeId, plane.id)),
+  );
+  const usedKg = occupied.reduce((sum, r) => sum + (r.weightKg ?? 0), 0);
+  if (usedKg + pkg.weightKg > type.maxPayloadKg) {
+    throw new GameActionError(409, `no payload room: the ${type.name} carries ${Math.round(usedKg)}/${type.maxPayloadKg} kg`);
   }
 
   await inst.db.update(schema.packages)
@@ -125,6 +125,51 @@ export async function flyPlane(inst: GameDb, planeId: string, destIcao: string):
       lon: origin.lon,
     })
     .where(eq(schema.planes.id, planeId));
+  // ISS-041: starting a flight resumes a paused sim (the last landing pauses it). Runs inside
+  // runAction(), so tick + unpause + dispatch are atomic under the sim lock.
+  await inst.db.update(schema.simState).set({ paused: false });
+  await persist(inst);
+}
+
+// --- Queue (POST /api/planes/:id/queue {destIcao}) — ISS-043 part 1 ---
+
+// Append a NOT-yet-started leg to the plane's queue. Works whether the plane is
+// grounded or flying (you can pre-build a route); nothing auto-starts here — the
+// active leg still starts via flyPlane, and queued legs chain on landing when fuel
+// covers them (lib/sim/engine.ts deliverPackages). Validation: known plane, ICAO
+// in the airport dataset.
+export async function queueLeg(inst: GameDb, planeId: string, destIcao: string): Promise<void> {
+  const planeRows = await inst.db.select().from(schema.planes).where(eq(schema.planes.id, planeId));
+  const plane = planeRows[0];
+  if (!plane) throw new GameActionError(404, `plane ${planeId} not found`);
+
+  const fc = await loadAirportsGeoJson();
+  if (!fc.features.some((f) => f.properties.icao === destIcao)) {
+    throw new GameActionError(400, `unknown airport ${destIcao}`);
+  }
+
+  const queue = parseIcaoQueue(plane.queue);
+  queue.push(destIcao);
+  await inst.db.update(schema.planes).set({ queue: JSON.stringify(queue) }).where(eq(schema.planes.id, planeId));
+  await persist(inst);
+}
+
+// --- Queue cancel (POST /api/planes/:id/queue/cancel {index}) — ISS-043 part 1 ---
+
+// Remove a NOT-yet-started leg from the queue by index. Only queued legs are
+// cancellable — the active in-flight leg (destIcao) is never affected. Validation:
+// known plane, integer index within [0, queue.length).
+export async function cancelQueuedLeg(inst: GameDb, planeId: string, index: number): Promise<void> {
+  const planeRows = await inst.db.select().from(schema.planes).where(eq(schema.planes.id, planeId));
+  const plane = planeRows[0];
+  if (!plane) throw new GameActionError(404, `plane ${planeId} not found`);
+
+  const queue = parseIcaoQueue(plane.queue);
+  if (index < 0 || index >= queue.length) {
+    throw new GameActionError(400, `queue index ${index} out of range — the queue holds ${queue.length} legs`);
+  }
+  queue.splice(index, 1);
+  await inst.db.update(schema.planes).set({ queue: JSON.stringify(queue) }).where(eq(schema.planes.id, planeId));
   await persist(inst);
 }
 

lib/game/catalog.ts

@@ -16,8 +16,10 @@ export interface PlaneType {
   // Market price in € (v0.8.0): buying costs `price`, selling pays out
   // SELL_FRACTION × price.
   price: number;
-  // Cargo slot capacity (v0.12.0): how many packages can be loaded on one plane.
-  capacity: number;
+  // Max payload in kg (v0.27.0, ISS-045 — replaces the v0.12.0 slot count): total
+  // package weight that can be loaded on one plane. ATR 72-600-class figure, tuned
+  // so every cargo type at max count × 1.3 jitter still fits alone (see UNIT_WEIGHT_KG).
+  maxPayloadKg: number;
 }
 
 export const PLANE_TYPES: Record<string, PlaneType> = {
@@ -31,7 +33,9 @@ export const PLANE_TYPES: Record<string, PlaneType> = {
     // €200k — with the starting cash of €20k and typical hop rewards (~€1–3k),
     // a second ATR takes sustained play to afford, as intended for the MVP sink.
     price: 200_000,
-    capacity: 6,
+    // ponytail: balance-tunable payload (kg) — every cargo type at max count × 1.3 jitter
+    // must stay below this so any single package fits alone; typical loads carry ~3–6 packages.
+    maxPayloadKg: 4_800,
   },
 };
 
@@ -57,7 +61,8 @@ export interface CatalogEntry {
   // lib/sim/movement.ts with these + FUEL_DENSITY_KG_PER_L.
   emptyWeightKg: number;
   speedKmh: number;
-  capacity: number;
+  // Max payload in kg (v0.27.0) — total package weight that can be loaded on one plane.
+  maxPayloadKg: number;
 }
 
 // The catalog as a flat array, one entry per plane type — the single source of
@@ -71,6 +76,6 @@ export function catalogEntries(): CatalogEntry[] {
     burnPerKm: t.burnPerKm,
     emptyWeightKg: t.emptyWeightKg,
     speedKmh: t.speedKmh,
-    capacity: t.capacity,
+    maxPayloadKg: t.maxPayloadKg,
   }));
 }

lib/game/seed.test.ts

@@ -9,8 +9,9 @@ import {
   generatePackage,
   HUB_ICAO,
   mulberry32,
+  REWARD_PER_KG,
   REWARD_PER_KM,
-  rewardForDistanceKm,
+  rewardFor,
   STARTING_CASH,
   STARTING_REPUTATION,
   type SeedAirport,
@@ -44,6 +45,7 @@ describe('buildSeed', () => {
       destIcao: null,
       lat: 50.0333,
       lon: 8.5706,
+      queue: [], // v0.25.0 (ISS-043) — no queued legs on first run
     });
   });
 
@@ -69,12 +71,26 @@ describe('buildSeed', () => {
     expect(new Set(seed.packages.map((c) => c.id)).size).toBe(seed.packages.length);
   });
 
-  it('scales reward by haversine distance: round(500 + 2.5 * km)', () => {
+  it('applies the reward formula: round(500 + 2.5 * km + 0.5 * weightKg)', () => {
     const seed = seedWith(42);
     for (const c of seed.packages) {
       const o = AIRPORTS.find((a) => a.icao === c.originIcao)!;
       const d = AIRPORTS.find((a) => a.icao === c.destIcao)!;
-      expect(c.reward).toBe(Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon)));
+      expect(c.reward).toBe(
+        Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon) + REWARD_PER_KG * c.weightKg),
+      );
+    }
+  });
+
+  it('gives every package a positive integer weight that fits the starter plane alone (balance constraint)', () => {
+    const maxPayload = PLANE_TYPES[STARTER_MODEL].maxPayloadKg;
+    for (const seed of [seedWith(42), seedWith(7)]) {
+      for (const c of seed.packages) {
+        expect(Number.isInteger(c.weightKg)).toBe(true);
+        expect(c.weightKg).toBeGreaterThan(0);
+        // max count × max jitter (1.3×) must still fit the ATR alone — see UNIT_WEIGHT_KG.
+        expect(c.weightKg).toBeLessThanOrEqual(maxPayload);
+      }
     }
   });
 
@@ -105,9 +121,9 @@ describe('buildSeed', () => {
     expect(() => buildSeed({ airports: AIRPORTS.slice(0, 1), rng: mulberry32(42), nowMs: NOW })).toThrow();
   });
 
-  it('rewardForDistanceKm applies the documented formula', () => {
-    expect(rewardForDistanceKm(0)).toBe(BASE_REWARD);
-    expect(rewardForDistanceKm(1000)).toBe(Math.round(BASE_REWARD + REWARD_PER_KM * 1000));
+  it('rewardFor applies the documented formula', () => {
+    expect(rewardFor(0, 0)).toBe(BASE_REWARD);
+    expect(rewardFor(1000, 2_000)).toBe(Math.round(BASE_REWARD + REWARD_PER_KM * 1000 + REWARD_PER_KG * 2_000));
   });
 });
 
@@ -126,7 +142,9 @@ describe('generatePackage (shared seed/spawn builder)', () => {
 
     const o = AIRPORTS.find((a) => a.icao === c.originIcao)!;
     const d = AIRPORTS.find((a) => a.icao === c.destIcao)!;
-    expect(c.reward).toBe(Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon)));
+    expect(c.reward).toBe(
+      Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon) + REWARD_PER_KG * c.weightKg),
+    );
 
     // Same 6–72h game-time deadline window as the seed.
     expect(c.deadlineSimTime).toBeGreaterThan(NOW + 6 * 3_600_000 - 1);
@@ -172,7 +190,9 @@ describe('generatePackage (shared seed/spawn builder)', () => {
 
       const o = AIRPORTS.find((a) => a.icao === c.originIcao)!;
       const d = AIRPORTS.find((a) => a.icao === c.destIcao)!;
-      expect(c.reward).toBe(Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon)));
+      expect(c.reward).toBe(
+        Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon) + REWARD_PER_KG * c.weightKg),
+      );
     });
 
     it('destIcao forces the destination; origin stays random but distinct', () => {
@@ -188,7 +208,9 @@ describe('generatePackage (shared seed/spawn builder)', () => {
 
       const o = AIRPORTS[0]; // EDDF
       const d = AIRPORTS[1]; // EHAM
-      expect(c.reward).toBe(Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon)));
+      expect(c.reward).toBe(
+        Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon) + REWARD_PER_KG * c.weightKg),
+      );
     });
 
     it('is deterministic for a fixed RNG with forced endpoints', () => {
@@ -211,4 +233,22 @@ describe('generatePackage (shared seed/spawn builder)', () => {
       expect(a).toEqual(b);
     });
   });
+
+  describe('forced weight (v0.27.0 e2e hook)', () => {
+    it('weightKg forces the package weight and feeds the payout', () => {
+      const c = generatePackage({ id: 'c-w', airports: AIRPORTS, rng: mulberry32(42), nowMs: NOW, weightKg: 1_234 });
+      expect(c.weightKg).toBe(1_234);
+
+      const o = AIRPORTS.find((a) => a.icao === c.originIcao)!;
+      const d = AIRPORTS.find((a) => a.icao === c.destIcao)!;
+      expect(c.reward).toBe(Math.round(BASE_REWARD + REWARD_PER_KM * haversineKm(o.lat, o.lon, d.lat, d.lon) + REWARD_PER_KG * 1_234));
+
+      // Deterministic for a fixed RNG…
+      const again = generatePackage({ id: 'c-w', airports: AIRPORTS, rng: mulberry32(42), nowMs: NOW, weightKg: 1_234 });
+      expect(again).toEqual(c);
+      // …and the forced value consumes no RNG draw — the deadline lands where an unforced call's jitter would.
+      const unforced = generatePackage({ id: 'c-u', airports: AIRPORTS, rng: mulberry32(42), nowMs: NOW });
+      expect(c.deadlineSimTime).not.toBe(unforced.deadlineSimTime);
+    });
+  });
 });

lib/game/seed.ts

@@ -38,6 +38,9 @@ export interface SeedPlane {
   destIcao: null;
   lat: number;
   lon: number;
+  // Upcoming legs not yet started (v0.25.0, ISS-043) — serialized to the queue
+  // column as JSON text on insert; defaults to an empty queue.
+  queue?: string[];
 }
 
 export interface SeedPackage {
@@ -47,6 +50,8 @@ export interface SeedPackage {
   reward: number;
   cargoType: string;
   cargoCount: number;
+  // Package weight in kg (v0.27.0, ISS-045) — unit weight × count with ±30% jitter.
+  weightKg: number;
   deadlineSimTime: number;
   status: 'open';
   planeId: null;
@@ -77,10 +82,12 @@ export const PACKAGE_COUNT_MAX = 12; // inclusive
 // count after expiries, so the job board never runs dry.
 export const MARKET_TARGET_OPEN_PACKAGES = 10;
 
-// Reward formula (v0.6.0 — deliberately simple; real revenue/cost modeling is a
-// later increment): reward = BASE_REWARD + REWARD_PER_KM * great-circle km.
+// Reward formula (v0.6.0 distance part, deliberately simple; real revenue/cost
+// modeling is a later increment; v0.27.0 weight part): reward = BASE_REWARD +
+// REWARD_PER_KM * great-circle km + REWARD_PER_KG * package weight kg.
 export const BASE_REWARD = 500;
 export const REWARD_PER_KM = 2.5;
+export const REWARD_PER_KG = 0.5;
 
 // Package deadlines: now + a plausible game-time window of 6–72 hours.
 const DEADLINE_MIN_HOURS = 6;
@@ -88,19 +95,33 @@ const DEADLINE_MAX_HOURS = 72;
 
 const CARGO_TYPES = ['Passengers', 'Mail', 'Perishables', 'Electronics', 'Auto parts'] as const;
 
-export function rewardForDistanceKm(km: number): number {
-  return Math.round(BASE_REWARD + REWARD_PER_KM * km);
+// ponytail: balance-tunable unit weights (kg per passenger/pallet). Chosen so every cargo
+// type at MAX count × max jitter (1.3×) still fits the ATR 72-600's payload alone, and
+// typical packages land ~400–2500 kg — a normal flight carries roughly 3–6 by weight.
+export const UNIT_WEIGHT_KG: Record<string, number> = {
+  Passengers: 50, // max 50 × 68 × 1.3 = 4420 < 4800
+  Mail: 60, // max 60 × 50 × 1.3 = 3900
+  Perishables: 70, // max 70 × 50 × 1.3 = 4550
+  Electronics: 40, // max 40 × 50 × 1.3 = 2600
+  'Auto parts': 72, // max 72 × 50 × 1.3 = 4680
+};
+
+export function rewardFor(km: number, weightKg: number): number {
+  return Math.round(BASE_REWARD + REWARD_PER_KM * km + REWARD_PER_KG * weightKg);
 }
 
 // Shared package generator, used by BOTH the first-run seed and the runtime
 // market spawn (v0.7.0) so spawned packages match seeded ones exactly: random
-// distinct airports from the dataset, distance-based reward, cargo flavor,
-// deadline now + 6–72h game time (or now + deadlineOffsetMs when given — used by
-// the e2e test hook to force a near-term expiry). The RNG call order per package
-// is fixed: origin, dest, cargoType, cargoCount, [deadline window].
+// distinct airports from the dataset, distance+weight-based reward, cargo flavor,
+// weight = unit weight × count with ±30% jitter (v0.27.0), deadline now + 6–72h
+// game time (or now + deadlineOffsetMs when given — used by the e2e test hook to
+// force a near-term expiry). The RNG call order per package is fixed: origin,
+// dest, cargoType, cargoCount, weight jitter, [deadline window].
 // v0.8.0: originIcao/destIcao optionally FORCE an endpoint (spawn coverage rule +
 // the e2e create-package hook); a forced endpoint consumes no RNG draws, so
 // callers that omit both get byte-identical behavior to before.
+// v0.27.0: weightKg optionally FORCES the package weight (e2e hook) — it skips the
+// jitter draw, same pattern as forced endpoints.
 export function generatePackage(input: {
   id: string;
   airports: SeedAirport[];
@@ -109,6 +130,7 @@ export function generatePackage(input: {
   deadlineOffsetMs?: number;
   originIcao?: string;
   destIcao?: string;
+  weightKg?: number;
 }): SeedPackage {
   const { airports, rng, nowMs } = input;
   if (airports.length < 2) throw new Error('package generation needs at least two airports');
@@ -140,6 +162,9 @@ export function generatePackage(input: {
   // Passengers up to the ATR 72's ~68 seats; other cargo in pallets.
   const cargoCount =
     cargoType === 'Passengers' ? 1 + Math.floor(rng() * 68) : 1 + Math.floor(rng() * 50);
+  // Weight (v0.27.0): unit weight × count with ±30% jitter, integer kg — drawn AFTER
+  // cargoCount so the fixed RNG order above holds; a forced weightKg skips the draw.
+  const weightKg = input.weightKg ?? Math.round(UNIT_WEIGHT_KG[cargoType] * cargoCount * (0.7 + 0.6 * rng()));
   const deadlineMs =
     input.deadlineOffsetMs ?? (DEADLINE_MIN_HOURS + rng() * (DEADLINE_MAX_HOURS - DEADLINE_MIN_HOURS)) * 3_600_000;
 
@@ -147,9 +172,10 @@ export function generatePackage(input: {
     id: input.id,
     originIcao: origin.icao,
     destIcao: dest.icao,
-    reward: rewardForDistanceKm(km),
+    reward: rewardFor(km, weightKg),
     cargoType,
     cargoCount,
+    weightKg,
     deadlineSimTime: Math.round(nowMs + deadlineMs),
     status: 'open',
     planeId: null,
@@ -182,6 +208,7 @@ export function buildSeed(input: {
     destIcao: null,
     lat: hub.lat,
     lon: hub.lon,
+    queue: [], // no queued legs on first run (v0.25.0)
   };
 
   const count = PACKAGE_COUNT_MIN + Math.floor(rng() * (PACKAGE_COUNT_MAX - PACKAGE_COUNT_MIN + 1));

lib/game/state.ts

@@ -24,6 +24,21 @@ export interface PlaneState {
   departureSimTime: number | null;
   lat: number;
   lon: number;
+  // Upcoming legs NOT yet started (v0.25.0, ISS-043) — ordered ICAOs; the active
+  // leg is destIcao. The engine auto-chains queue[0] on landing when fuel covers it.
+  queue: string[];
+}
+
+// Parse the planes.queue JSON column into an ICAO list (v0.25.0). Guards against
+// null/empty/malformed values so a corrupt cell can never break a snapshot or tick.
+export function parseIcaoQueue(raw: string | null): string[] {
+  if (!raw) return [];
+  try {
+    const v: unknown = JSON.parse(raw);
+    return Array.isArray(v) ? v.filter((x): x is string => typeof x === 'string') : [];
+  } catch {
+    return [];
+  }
 }
 
 export interface PackageState {
@@ -35,6 +50,8 @@ export interface PackageState {
   reward: number;
   cargoType: string;
   cargoCount: number;
+  // Package weight in kg (v0.27.0, ISS-045) — drives load validation + per-kg payout.
+  weightKg: number;
   deadlineSimTime: number;
   status: 'open' | 'loaded' | 'delivered' | 'expired' | 'abandoned';
   planeId: string | null;
@@ -108,6 +125,7 @@ export async function getStateSnapshot(): Promise<StateSnapshot> {
         departureSimTime: p.departureSimTime,
         lat: live?.lat ?? p.lat,
         lon: live?.lon ?? p.lon,
+        queue: parseIcaoQueue(p.queue),
       };
     }),
     packages: packageRows.map((p) => ({
@@ -119,6 +137,7 @@ export async function getStateSnapshot(): Promise<StateSnapshot> {
       reward: p.reward,
       cargoType: p.cargoType,
       cargoCount: p.cargoCount,
+      weightKg: p.weightKg,
       deadlineSimTime: p.deadlineSimTime,
       status: p.status,
       planeId: p.planeId,

lib/mapData.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'vitest';
 import type { StateSnapshot } from './game/state';
-import { planesGeoJson, routesGeoJson, hoverRouteGeoJson, greatCircleArc, ROUTE_ARC_SEGMENTS, type AirportCoord } from './mapData';
+import { planesGeoJson, queuedRoutesGeoJson, routesGeoJson, hoverRouteGeoJson, hoverTraceGeoJson, greatCircleArc, ROUTE_ARC_SEGMENTS, type AirportCoord } from './mapData';
 import { haversineKm } from './geo';
 
 const AIRPORTS = new Map<string, AirportCoord>([
@@ -17,7 +17,7 @@ function snapshot(overrides: Partial<StateSnapshot> = {}): StateSnapshot {
     planes: [],
     packages: [],
     catalog: [
-      { model: 'atr72', label: 'ATR 72-600', price: 200_000, maxFuel: 6300, burnPerKm: 1.75, emptyWeightKg: 9_300, speedKmh: 510, capacity: 6 },
+      { model: 'atr72', label: 'ATR 72-600', price: 200_000, maxFuel: 6300, burnPerKm: 1.75, emptyWeightKg: 9_300, speedKmh: 510, maxPayloadKg: 4_800 },
     ],
     fuelPricePerL: 0.8,
     sellFraction: 0.5,
@@ -34,8 +34,8 @@ describe('planesGeoJson', () => {
     const fc = planesGeoJson(
       snapshot({
         planes: [
-          { id: 'plane-starter', model: 'atr72', status: 'available', fuel: 6300, maxFuel: 6300, locationIcao: 'EDDF', locationName: 'Frankfurt Main Airport', destIcao: null, destName: null, departureSimTime: null, lat: 50.03, lon: 8.56 },
-          { id: 'plane-2', model: 'atr72', status: 'flying', fuel: 4000, maxFuel: 6300, locationIcao: 'EDDF', locationName: 'Frankfurt Main Airport', destIcao: 'EDDV', destName: 'Hannover Airport', departureSimTime: 1000, lat: 51.2, lon: 9.1 },
+          { id: 'plane-starter', model: 'atr72', status: 'available', fuel: 6300, maxFuel: 6300, locationIcao: 'EDDF', locationName: 'Frankfurt Main Airport', destIcao: null, destName: null, departureSimTime: null, lat: 50.03, lon: 8.56, queue: [] },
+          { id: 'plane-2', model: 'atr72', status: 'flying', fuel: 4000, maxFuel: 6300, locationIcao: 'EDDF', locationName: 'Frankfurt Main Airport', destIcao: 'EDDV', destName: 'Hannover Airport', departureSimTime: 1000, lat: 51.2, lon: 9.1, queue: [] },
         ],
       }),
     );
@@ -61,7 +61,7 @@ describe('planesGeoJson', () => {
       snapshot({
         catalog: [],
         planes: [
-          { id: 'p1', model: 'mystery', status: 'available', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'x', destIcao: null, destName: null, departureSimTime: null, lat: 0, lon: 0 },
+          { id: 'p1', model: 'mystery', status: 'available', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'x', destIcao: null, destName: null, departureSimTime: null, lat: 0, lon: 0, queue: [] },
         ],
       }),
     );
@@ -72,7 +72,7 @@ describe('planesGeoJson', () => {
     const fc = planesGeoJson(
       snapshot({
         planes: [
-          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'x', destIcao: null, destName: null, departureSimTime: 0, lat: 0, lon: 0 },
+          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'x', destIcao: null, destName: null, departureSimTime: 0, lat: 0, lon: 0, queue: [] },
         ],
       }),
     );
@@ -89,7 +89,7 @@ describe('routesGeoJson (v0.12.0 — one line per flying plane\'s current leg)',
     const fc = routesGeoJson(
       snapshot({
         planes: [
-          { id: 'p1', model: 'atr72', status: 'available', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: null, destName: null, departureSimTime: null, lat: 50.03, lon: 8.56 },
+          { id: 'p1', model: 'atr72', status: 'available', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: null, destName: null, departureSimTime: null, lat: 50.03, lon: 8.56, queue: [] },
         ],
       }),
       AIRPORTS,
@@ -101,7 +101,7 @@ describe('routesGeoJson (v0.12.0 — one line per flying plane\'s current leg)',
     const fc = routesGeoJson(
       snapshot({
         planes: [
-          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 51, lon: 9 },
+          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 51, lon: 9, queue: [] },
         ],
       }),
       AIRPORTS,
@@ -118,7 +118,7 @@ describe('routesGeoJson (v0.12.0 — one line per flying plane\'s current leg)',
     const fc = routesGeoJson(
       snapshot({
         planes: [
-          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'ZZZZ', locationName: '?', destIcao: 'EDDV', destName: 'H', departureSimTime: 0, lat: 0, lon: 0 },
+          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'ZZZZ', locationName: '?', destIcao: 'EDDV', destName: 'H', departureSimTime: 0, lat: 0, lon: 0, queue: [] },
         ],
       }),
       AIRPORTS,
@@ -130,8 +130,8 @@ describe('routesGeoJson (v0.12.0 — one line per flying plane\'s current leg)',
     const fc = routesGeoJson(
       snapshot({
         planes: [
-          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EDDV', destName: 'H', departureSimTime: 0, lat: 51, lon: 9 },
-          { id: 'p2', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDV', locationName: 'H', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 52.4, lon: 9.6 },
+          { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EDDV', destName: 'H', departureSimTime: 0, lat: 51, lon: 9, queue: [] },
+          { id: 'p2', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDV', locationName: 'H', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 52.4, lon: 9.6, queue: [] },
         ],
       }),
       AIRPORTS,
@@ -140,6 +140,69 @@ describe('routesGeoJson (v0.12.0 — one line per flying plane\'s current leg)',
   });
 });
 
+describe('queuedRoutesGeoJson (ISS-043 v0.26.0 — dotted queue line: dest → queued legs only)', () => {
+  it('draws nothing for a grounded plane, even with a non-empty queue', () => {
+    const fc = queuedRoutesGeoJson(
+      [
+        { id: 'p1', model: 'atr72', status: 'available', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: null, destName: null, departureSimTime: null, lat: 50.03, lon: 8.56, queue: ['EHAM'] },
+      ],
+      AIRPORTS,
+    );
+    expect(fc.features).toHaveLength(0);
+  });
+
+  it('draws nothing for a flying plane with an empty queue', () => {
+    const fc = queuedRoutesGeoJson(
+      [
+        { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 51, lon: 9, queue: [] },
+      ],
+      AIRPORTS,
+    );
+    expect(fc.features).toHaveLength(0);
+  });
+
+  it('flying plane with a 2-leg queue → one feature chaining dest → q0 → q1 with exact endpoints', () => {
+    const fc = queuedRoutesGeoJson(
+      [
+        // Active leg EDDF→EHAM stays in routesGeoJson; the queue line is ONLY EHAM → EDDV → LEMD.
+        { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 51, lon: 9, queue: ['EDDV', 'LEMD'] },
+      ],
+      AIRPORTS,
+    );
+    expect(fc.features).toHaveLength(1);
+    expect(fc.features[0].properties).toEqual({ planeId: 'p1' });
+    const coords = fc.features[0].geometry.coordinates;
+    // Two concatenated arcs with the shared joint point dropped once: n_legs × SEGMENTS + 1 points.
+    expect(coords.length).toBe(2 * ROUTE_ARC_SEGMENTS + 1);
+    expect(coords[0]).toEqual([4.76, 52.31]); // starts at DEST (EHAM), not at the plane's origin
+    expect(coords[coords.length - 1]).toEqual([-3.56, 40.47]); // ends at the last queued airport (LEMD)
+    expect(coords[ROUTE_ARC_SEGMENTS]).toEqual([9.68, 52.46]); // joint point = first queued airport (EDDV), exact
+  });
+
+  it('skips a plane whose dest or a queued ICAO is missing from the airport index', () => {
+    const fc = queuedRoutesGeoJson(
+      [
+        { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'ZZZZ', destName: '?', departureSimTime: 0, lat: 51, lon: 9, queue: ['EHAM'] },
+        { id: 'p2', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 51, lon: 9, queue: ['ZZZZ'] },
+      ],
+      AIRPORTS,
+    );
+    expect(fc.features).toHaveLength(0);
+  });
+
+  it('one feature per qualifying plane — grounded and empty-queue planes draw nothing', () => {
+    const fc = queuedRoutesGeoJson(
+      [
+        { id: 'p1', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EDDF', locationName: 'F', destIcao: 'EHAM', destName: 'A', departureSimTime: 0, lat: 51, lon: 9, queue: ['LEMD'] },
+        { id: 'p2', model: 'atr72', status: 'flying', fuel: 1, maxFuel: 2, locationIcao: 'EHAM', locationName: 'A', destIcao: 'EDDV', destName: 'H', departureSimTime: 0, lat: 52.3, lon: 4.7, queue: [] },
+        { id: 'p3', model: 'atr72', status: 'available', fuel: 1, maxFuel: 2, locationIcao: 'EDDV', locationName: 'H', destIcao: null, destName: null, departureSimTime: null, lat: 52.46, lon: 9.68, queue: ['LEMD'] },
+      ],
+      AIRPORTS,
+    );
+    expect(fc.features.map((f) => f.properties.planeId)).toEqual(['p1']);
+  });
+});
+
 describe('hoverRouteGeoJson (ISS-022/025/027 v0.22.0 — hover route trace)', () => {
   it('returns an empty collection for the no-hover "" sentinel', () => {
     expect(hoverRouteGeoJson('', '', AIRPORTS)).toEqual({ type: 'FeatureCollection', features: [] });
@@ -176,6 +239,23 @@ describe('hoverRouteGeoJson (ISS-022/025/027 v0.22.0 — hover route trace)', ()
   });
 });
 
+describe('hoverTraceGeoJson (ISS-040 v0.23.2 — on-board package trace from the carrier\'s live position)', () => {
+  it('draws one great-circle line from the given start coord to the dest airport with exact endpoints', () => {
+    const from = { lat: 51.2, lon: 9.1 }; // a mid-flight position — not an airport
+    const fc = hoverTraceGeoJson(from, 'EHAM', AIRPORTS);
+    expect(fc.features).toHaveLength(1);
+    expect(fc.features[0].properties).toEqual({ planeId: '' }); // pure overlay — no owning plane
+    const coords = fc.features[0].geometry.coordinates;
+    expect(coords.length).toBe(ROUTE_ARC_SEGMENTS + 1); // sampled arc, not a 2-point chord
+    expect(coords[0]).toEqual([9.1, 51.2]); // live start — exact endpoint
+    expect(coords[coords.length - 1]).toEqual([4.76, 52.31]); // EHAM — exact endpoint
+  });
+
+  it('returns an empty collection when the dest airport is missing from the dataset', () => {
+    expect(hoverTraceGeoJson({ lat: 0, lon: 0 }, 'ZZZZ', AIRPORTS)).toEqual({ type: 'FeatureCollection', features: [] });
+  });
+});
+
 describe('greatCircleArc (v0.12.2 — curved route traces)', () => {
   it('samples >2 points with the endpoints exactly at the airport coords', () => {
     const arc = greatCircleArc(AIRPORTS.get('EDDF')!, AIRPORTS.get('EHAM')!);

lib/mapData.ts

@@ -1,4 +1,4 @@
-import type { StateSnapshot } from './game/state';
+import type { PlaneState, StateSnapshot } from './game/state';
 import { formatFuel } from './format';
 import { positionAt } from './sim/movement';
 
@@ -112,6 +112,32 @@ export function hoverRouteGeoJson(
   };
 }
 
+// ISS-040 (v0.23.2): the on-board package hover trace — same shape as hoverRouteGeoJson but the
+// start is a live COORDINATE (the carrier plane's current position), not an airport ICAO: once the
+// plane has departed with cargo still loaded, the preview must begin where it actually is. Empty
+// collection when the destination is missing from the dataset — never guessed.
+export function hoverTraceGeoJson(
+  from: AirportCoord,
+  toIcao: string,
+  airportsByIcao: ReadonlyMap<string, AirportCoord>,
+): FeatureCollection<MapLineFeature> {
+  const to = airportsByIcao.get(toIcao);
+  if (!to) return EMPTY_LINES;
+  return {
+    type: 'FeatureCollection',
+    features: [
+      {
+        type: 'Feature',
+        geometry: {
+          type: 'LineString',
+          coordinates: greatCircleArc(from, to),
+        },
+        properties: { planeId: '' }, // no owning plane — a pure hover overlay
+      },
+    ],
+  };
+}
+
 // One LineString per FLYING plane — its current leg from locationIcao to dest_icao.
 // Grounded planes draw nothing; a flying plane missing either endpoint from the
 // dataset is skipped, never guessed. The line is sampled along the great circle
@@ -138,3 +164,31 @@ export function routesGeoJson(
   }
   return { type: 'FeatureCollection', features };
 }
+
+// ISS-043 (v0.26.0): the dotted queue line — one LineString per FLYING plane with a non-empty
+// queue, chaining dest → queue[0] → … → queue[n−1]: ONLY the not-yet-started legs (the active
+// leg locationIcao→dest stays in routesGeoJson's solid layer). Arcs are concatenated with the
+// shared joint point dropped once. A plane is skipped — never guessed — when its dest or any
+// queued ICAO is missing from the airport index; empty collection when nothing qualifies.
+export function queuedRoutesGeoJson(
+  planes: PlaneState[],
+  airportsByIcao: ReadonlyMap<string, AirportCoord>,
+): FeatureCollection<MapLineFeature> {
+  const features: MapLineFeature[] = [];
+  for (const p of planes) {
+    if (p.status !== 'flying' || !p.destIcao || p.queue.length === 0) continue;
+    const pts = [p.destIcao, ...p.queue].map((icao) => airportsByIcao.get(icao));
+    if (pts.some((c) => c === undefined)) continue; // an endpoint is missing from the dataset — skip
+    const coords: [number, number][] = [];
+    for (let i = 0; i < pts.length - 1; i++) {
+      const arc = greatCircleArc(pts[i]!, pts[i + 1]!);
+      coords.push(...(i === 0 ? arc : arc.slice(1))); // drop the duplicated joint point
+    }
+    features.push({
+      type: 'Feature',
+      geometry: { type: 'LineString', coordinates: coords },
+      properties: { planeId: p.id },
+    });
+  }
+  return { type: 'FeatureCollection', features };
+}

lib/openapi.test.ts

@@ -3,7 +3,7 @@ import { describe, expect, it } from 'vitest';
 import { openApiSpec } from './openapi';
 
 describe('OpenAPI spec', () => {
-  it('documents exactly the ten public endpoints (4 read + 6 player actions)', () => {
+  it('documents exactly the twelve public endpoints (4 read + 8 player actions)', () => {
     expect(Object.keys(openApiSpec.paths).sort()).toEqual([
       '/api/airports',
       '/api/market/buy-plane',
@@ -11,6 +11,8 @@ describe('OpenAPI spec', () => {
       '/api/packages/{id}/abandon',
       '/api/packages/{id}/load',
       '/api/planes/{planeId}/fly',
+      '/api/planes/{planeId}/queue', // v0.25.0 (ISS-043)
+      '/api/planes/{planeId}/queue/cancel', // v0.25.0 (ISS-043)
       '/api/planes/{planeId}/refuel',
       '/api/sim',
       '/api/state',
@@ -92,18 +94,17 @@ describe('OpenAPI spec', () => {
     const catalog = openApiSpec.components.schemas.CatalogEntry.properties;
     expect(Object.keys(catalog).sort()).toEqual([
       'burnPerKm',
-      'capacity',
       'emptyWeightKg', // v0.16.0 weighted burn model input
       'label',
       'maxFuel',
+      'maxPayloadKg', // v0.27.0 (ISS-045) — replaces the v0.12.0 slot capacity
       'model',
       'price',
       'speedKmh',
     ]);
-    for (const key of ['burnPerKm', 'emptyWeightKg', 'maxFuel', 'price', 'speedKmh'] as const) {
+    for (const key of ['burnPerKm', 'emptyWeightKg', 'maxFuel', 'maxPayloadKg', 'price', 'speedKmh'] as const) {
       expect(catalog[key].type, `CatalogEntry.${key}`).toBe('number');
     }
-    expect(catalog.capacity.type).toBe('integer'); // v0.12.0 slot capacity
     expect(catalog.model.type).toBe('string');
     expect(catalog.label.type).toBe('string');
 
@@ -120,6 +121,7 @@ describe('OpenAPI spec', () => {
       'lon',
       'maxFuel',
       'model',
+      'queue', // v0.25.0 (ISS-043) — upcoming legs not yet started
       'status',
     ]);
 
@@ -137,6 +139,7 @@ describe('OpenAPI spec', () => {
       'planeId',
       'reward',
       'status',
+      'weightKg', // v0.27.0 (ISS-045) — package weight in kg
     ]);
 
     const sim = openApiSpec.components.schemas.SimState.properties;
@@ -169,7 +172,7 @@ describe('OpenAPI spec', () => {
     expect(Object.keys(error)).toEqual(['error']);
   });
 
-  it('documents the six action endpoints: snapshot on 200, Error on their 4xx paths', () => {
+  it('documents the eight action endpoints: snapshot on 200, Error on their 4xx paths', () => {
     // The spec object is a literal type; these helpers view it as plain JSON.
     const post = (p: string) =>
       ((openApiSpec.paths as Record<string, { post?: unknown }>)[p]?.post ?? {}) as {
@@ -183,6 +186,8 @@ describe('OpenAPI spec', () => {
       '/api/packages/{id}/load',
       '/api/packages/{id}/abandon',
       '/api/planes/{planeId}/fly',
+      '/api/planes/{planeId}/queue', // v0.25.0 (ISS-043)
+      '/api/planes/{planeId}/queue/cancel', // v0.25.0 (ISS-043)
       '/api/market/buy-plane',
       '/api/market/sell-plane',
       '/api/planes/{planeId}/refuel',
@@ -196,6 +201,8 @@ describe('OpenAPI spec', () => {
     expect(errorCodes('/api/packages/{id}/load')).toEqual(['400', '404', '409']);
     expect(errorCodes('/api/packages/{id}/abandon')).toEqual(['404', '409']);
     expect(errorCodes('/api/planes/{planeId}/fly')).toEqual(['400', '404', '409']);
+    expect(errorCodes('/api/planes/{planeId}/queue')).toEqual(['400', '404']); // v0.25.0 — no 409: queueing works grounded or flying
+    expect(errorCodes('/api/planes/{planeId}/queue/cancel')).toEqual(['400', '404']); // v0.25.0
     expect(errorCodes('/api/market/buy-plane')).toEqual(['400', '409']);
     expect(errorCodes('/api/market/sell-plane')).toEqual(['400', '404', '409']);
     expect(errorCodes('/api/planes/{planeId}/refuel')).toEqual(['400', '404', '409']); // v0.16.0 optional body
@@ -208,6 +215,12 @@ describe('OpenAPI spec', () => {
     expect(post('/api/planes/{planeId}/fly').requestBody?.content['application/json'].schema.$ref).toBe(
       '#/components/schemas/FlyPlaneRequest',
     );
+    expect(post('/api/planes/{planeId}/queue').requestBody?.content['application/json'].schema.$ref).toBe(
+      '#/components/schemas/QueueLegRequest', // v0.25.0 (ISS-043)
+    );
+    expect(post('/api/planes/{planeId}/queue/cancel').requestBody?.content['application/json'].schema.$ref).toBe(
+      '#/components/schemas/CancelQueuedLegRequest', // v0.25.0 (ISS-043)
+    );
     expect(post('/api/market/buy-plane').requestBody?.content['application/json'].schema.$ref).toBe(
       '#/components/schemas/BuyPlaneRequest',
     );
@@ -224,6 +237,8 @@ describe('OpenAPI spec', () => {
     expect(paramNames('/api/packages/{id}/load')).toEqual(['id']);
     expect(paramNames('/api/packages/{id}/abandon')).toEqual(['id']);
     expect(paramNames('/api/planes/{planeId}/fly')).toEqual(['planeId']);
+    expect(paramNames('/api/planes/{planeId}/queue')).toEqual(['planeId']); // v0.25.0 (ISS-043)
+    expect(paramNames('/api/planes/{planeId}/queue/cancel')).toEqual(['planeId']); // v0.25.0 (ISS-043)
     expect(paramNames('/api/planes/{planeId}/refuel')).toEqual(['planeId']);
 
     // Request schema shapes.
@@ -233,6 +248,13 @@ describe('OpenAPI spec', () => {
     const fly = openApiSpec.components.schemas.FlyPlaneRequest;
     expect(fly.required).toEqual(['destIcao']);
     expect(fly.properties.destIcao.type).toBe('string');
+    // v0.25.0 (ISS-043): the queue request schemas mirror fly's destIcao shape.
+    const queueLeg = openApiSpec.components.schemas.QueueLegRequest;
+    expect(queueLeg.required).toEqual(['destIcao']);
+    expect(queueLeg.properties.destIcao.type).toBe('string');
+    const cancelQueuedLeg = openApiSpec.components.schemas.CancelQueuedLegRequest;
+    expect(cancelQueuedLeg.required).toEqual(['index']);
+    expect(cancelQueuedLeg.properties.index.type).toBe('integer');
     const buy = openApiSpec.components.schemas.BuyPlaneRequest;
     expect(buy.required).toEqual(['model']);
     expect(buy.properties.model.type).toBe('string');

lib/openapi.ts

@@ -106,7 +106,7 @@ export const openApiSpec = {
       post: {
         summary: 'Load a package onto a plane',
         description:
-          'Bind an OPEN package to a GROUNDED ("available") plane at the package\'s origin (v0.12.0). The plane needs a free slot — capacity per catalog model; expired packages still occupy theirs. The sim clock is ticked first, so the returned snapshot reflects current game time.',
+          'Bind an OPEN package to a GROUNDED ("available") plane at the package\'s origin (v0.12.0). The plane needs enough payload room for the package weight — maxPayloadKg per catalog model; expired packages still occupy theirs (v0.27.0). The sim clock is ticked first, so the returned snapshot reflects current game time.',
         operationId: 'loadPackage',
         parameters: [
           { name: 'id', in: 'path', required: true, schema: { type: 'string' } },
@@ -204,6 +204,74 @@ export const openApiSpec = {
         },
       },
     },
+    '/api/planes/{planeId}/queue': {
+      post: {
+        summary: 'Queue a flight leg for a plane',
+        description:
+          'Append a NOT-yet-started leg to the plane\'s flight queue (v0.25.0, ISS-043). Works whether the plane is grounded or flying — you can pre-build a route; the active leg still starts via /fly and nothing auto-starts here. On landing, the engine auto-chains the first queued leg when fuel covers it (otherwise the plane grounds with the queue kept intact for refuel + re-dispatch).',
+        operationId: 'queueLeg',
+        parameters: [
+          { name: 'planeId', in: 'path', required: true, schema: { type: 'string' } },
+        ],
+        requestBody: {
+          required: true,
+          content: {
+            'application/json': {
+              schema: { $ref: '#/components/schemas/QueueLegRequest' },
+            },
+          },
+        },
+        responses: {
+          200: {
+            description: 'Queued — full state snapshot (plane.queue now includes the new leg)',
+            content: { 'application/json': { schema: { $ref: '#/components/schemas/StateSnapshot' } } },
+          },
+          400: {
+            description:
+              'Invalid body (not an object, unknown field, or missing/non-string destIcao) or the ICAO is not in the airport dataset',
+            content: { 'application/json': { schema: { $ref: '#/components/schemas/Error' } } },
+          },
+          404: {
+            description: 'Unknown plane id',
+            content: { 'application/json': { schema: { $ref: '#/components/schemas/Error' } } },
+          },
+        },
+      },
+    },
+    '/api/planes/{planeId}/queue/cancel': {
+      post: {
+        summary: 'Cancel a queued flight leg',
+        description:
+          'Remove a NOT-yet-started leg from the plane\'s queue by index (v0.25.0, ISS-043). Only queued legs are cancellable — the active in-flight leg (destIcao) is never affected.',
+        operationId: 'cancelQueuedLeg',
+        parameters: [
+          { name: 'planeId', in: 'path', required: true, schema: { type: 'string' } },
+        ],
+        requestBody: {
+          required: true,
+          content: {
+            'application/json': {
+              schema: { $ref: '#/components/schemas/CancelQueuedLegRequest' },
+            },
+          },
+        },
+        responses: {
+          200: {
+            description: 'Cancelled — full state snapshot (plane.queue without the removed leg)',
+            content: { 'application/json': { schema: { $ref: '#/components/schemas/StateSnapshot' } } },
+          },
+          400: {
+            description:
+              'Invalid body (not an object, unknown field, or non-integer index) or the index is outside [0, queue.length)',
+            content: { 'application/json': { schema: { $ref: '#/components/schemas/Error' } } },
+          },
+          404: {
+            description: 'Unknown plane id',
+            content: { 'application/json': { schema: { $ref: '#/components/schemas/Error' } } },
+          },
+        },
+      },
+    },
     '/api/market/buy-plane': {
       post: {
         summary: 'Buy a plane from the market',
@@ -393,9 +461,9 @@ export const openApiSpec = {
           burnPerKm: { type: 'number', description: 'Cruise fuel burn at a full tank, liters/km (v0.16.0 weighted model calibrates to this).' },
           emptyWeightKg: { type: 'number', description: 'Operating empty weight, kg — with burnPerKm and maxFuel it drives the v0.16.0 weight-proportional burn model.' },
           speedKmh: { type: 'number', description: 'Cruise speed, km/h.' },
-          capacity: { type: 'integer', description: 'Cargo slot capacity — packages that can be loaded on one plane (v0.12.0).' },
+          maxPayloadKg: { type: 'number', description: 'Max payload in kg — total package weight that can be loaded on one plane (v0.27.0, replaces the v0.12.0 slot count).' },
         },
-        required: ['model', 'label', 'price', 'maxFuel', 'burnPerKm', 'emptyWeightKg', 'speedKmh', 'capacity'],
+        required: ['model', 'label', 'price', 'maxFuel', 'burnPerKm', 'emptyWeightKg', 'speedKmh', 'maxPayloadKg'],
       },
       AccountState: {
         type: 'object',
@@ -430,7 +498,7 @@ export const openApiSpec = {
       LoadPackageRequest: {
         type: 'object',
         properties: {
-          planeId: { type: 'string', description: 'A GROUNDED ("available") plane at the package\'s origin with a free slot.' },
+          planeId: { type: 'string', description: 'A GROUNDED ("available") plane at the package\'s origin with enough payload room for it (v0.27.0).' },
         },
         required: ['planeId'],
       },
@@ -441,6 +509,20 @@ export const openApiSpec = {
         },
         required: ['destIcao'],
       },
+      QueueLegRequest: {
+        type: 'object',
+        properties: {
+          destIcao: { type: 'string', description: 'Any airport ICAO from the dataset — appended to the queue as a not-yet-started leg (v0.25.0).' },
+        },
+        required: ['destIcao'],
+      },
+      CancelQueuedLegRequest: {
+        type: 'object',
+        properties: {
+          index: { type: 'integer', description: 'Zero-based position of the queued (not-yet-started) leg to remove; must be within [0, queue.length) (v0.25.0).' },
+        },
+        required: ['index'],
+      },
       BuyPlaneRequest: {
         type: 'object',
         properties: {
@@ -502,6 +584,12 @@ export const openApiSpec = {
           },
           lat: { type: 'number' },
           lon: { type: 'number' },
+          queue: {
+            type: 'array',
+            items: { type: 'string' },
+            description:
+              'Upcoming flight legs NOT yet started (v0.25.0) — ordered ICAOs; the active leg is destIcao. The engine auto-chains queue[0] on landing when fuel covers it.',
+          },
         },
         required: [
           'id',
@@ -516,6 +604,7 @@ export const openApiSpec = {
           'departureSimTime',
           'lat',
           'lon',
+          'queue',
         ],
       },
       PackageState: {
@@ -529,6 +618,7 @@ export const openApiSpec = {
           reward: { type: 'number' },
           cargoType: { type: 'string' },
           cargoCount: { type: 'integer' },
+          weightKg: { type: 'number', description: 'Package weight in kg (v0.27.0) — drives load validation and the per-kg payout part.' },
           deadlineSimTime: { type: 'integer', description: 'Sim-clock epoch ms (game time)' },
           // 'expired' = an open OR loaded package whose deadline passed on a tick;
           // loaded expired packages keep their slot, deliver no reward, abandon free.
@@ -545,6 +635,7 @@ export const openApiSpec = {
           'reward',
           'cargoType',
           'cargoCount',
+          'weightKg', // v0.27.0 (ISS-045) — package weight in kg
           'deadlineSimTime',
           'status',
           'planeId',

lib/sim/engine.test.ts

@@ -9,7 +9,7 @@ import { loadAirportsGeoJson } from '@/lib/airports';
 import { haversineKm } from '@/lib/geo';
 import { PLANE_TYPES } from '@/lib/game/catalog';
 import { MARKET_TARGET_OPEN_PACKAGES, mulberry32 } from '@/lib/game/seed';
-import { arrivalTimeFor, fuelAtWeighted } from './movement';
+import { arrivalTimeFor, fuelAtWeighted, requiredFuelFor } from './movement';
 import {
   clampTimeScale,
   deliverPackages,
@@ -235,9 +235,71 @@ describe('deliverPackages (v0.12.0 arrival delivery)', () => {
       .set({ status: 'flying', departureSimTime: T0 });
     expect(await deliverPackages(inst, T0 + 3_600_000)).toBe(0);
   });
+
+  // --- Auto-chain on landing (v0.25.0, ISS-043) ---
+
+  it('auto-chains to the next queued leg when fuel covers it', async () => {
+    const { inst, to, km, type } = await setupFlight('chain-ok.db'); // full tank EDDF→LEMD
+    const fc = await loadAirportsGeoJson();
+    const nextP = fc.features.find((f) => f.properties.icao === 'EHAM')!.properties;
+    const nextKm = haversineKm(to.lat, to.lon, nextP.lat, nextP.lon);
+
+    // Precondition sanity: a full-tank departure leaves enough for the LEMD→EHAM hop.
+    const landedFuel = fuelAtWeighted(type.maxFuel, type.burnPerKm, type.emptyWeightKg, type.maxFuel, km, 1);
+    expect(requiredFuelFor(type.burnPerKm, type.emptyWeightKg, type.maxFuel, nextKm)).toBeLessThanOrEqual(landedFuel);
+
+    await inst.db.update(schema.planes)
+      .set({ queue: JSON.stringify(['EHAM', 'EDDV']) })
+      .where(eq(schema.planes.id, 'plane-starter'));
+
+    const clock = T0 + travelMs(km, type.speedKmh); // exactly at arrival
+    expect(await deliverPackages(inst, clock)).toBe(1);
+
+    const plane = (await inst.db.select().from(schema.planes))[0];
+    expect(plane.status).toBe('flying'); // chained — still airborne, no ground stop
+    expect(plane.destIcao).toBe('EHAM'); // first queued leg is now the active one
+    expect(plane.departureSimTime).toBe(clock); // departed at the arrival instant…
+    expect(plane.locationIcao).toBe(TO); // …from the airport just landed at
+    expect(plane.lat).toBe(to.lat);
+    expect(plane.lon).toBe(to.lon);
+    expect(JSON.parse(plane.queue)).toEqual(['EDDV']); // first leg consumed, rest kept in order
+  });
+
+  it('grounds when fuel cannot cover the next queued leg, keeping the queue intact', async () => {
+    const { inst, km, type } = await setupFlight('chain-nofuel.db');
+    const fc = await loadAirportsGeoJson();
+    const nextP = fc.features.find((f) => f.properties.icao === 'EHAM')!.properties;
+
+    // Depart with exactly the fuel for EDDF→LEMD → lands empty, cannot start LEMD→EHAM.
+    await inst.db.update(schema.planes)
+      .set({
+        fuel: requiredFuelFor(type.burnPerKm, type.emptyWeightKg, type.maxFuel, km),
+        queue: JSON.stringify(['EHAM']),
+      })
+      .where(eq(schema.planes.id, 'plane-starter'));
+
+    const clock = T0 + travelMs(km, type.speedKmh); // exactly at arrival
+    expect(await deliverPackages(inst, clock)).toBe(1);
+
+    const plane = (await inst.db.select().from(schema.planes))[0];
+    expect(plane.status).toBe('available'); // grounded safely…
+    expect(plane.destIcao).toBeNull();
+    expect(plane.departureSimTime).toBeNull();
+    expect(JSON.parse(plane.queue)).toEqual(['EHAM']); // …queue kept for refuel + re-dispatch
+  });
+
+  it('grounds as before when the queue is empty', async () => {
+    const { inst, km } = await setupFlight('chain-empty.db'); // seeded default queue '[]'
+
+    expect(await deliverPackages(inst, T0 + travelMs(km, PLANE_TYPES.atr72.speedKmh))).toBe(1);
+
+    const plane = (await inst.db.select().from(schema.planes))[0];
+    expect(plane.status).toBe('available'); // unchanged landing behavior…
+    expect(JSON.parse(plane.queue)).toEqual([]); // …and the queue stays empty
+  });
 });
 
-describe('auto-slow to 1× when the last plane lands (ISS-011)', () => {
+describe('pause on landing when the last plane lands (ISS-041)', () => {
   const FROM = 'EDDF';
   const TO = 'LEMD';
 
@@ -259,19 +321,20 @@ describe('auto-slow to 1× when the last plane lands (ISS-011)', () => {
     return { inst, from, km, type };
   }
 
-  it('last plane lands → stored timeScale becomes 1', async () => {
-    const { inst } = await setupLanding('autoslow-last.db', 1000);
+  it('last plane lands → sim pauses and stored timeScale is UNCHANGED', async () => {
+    const { inst } = await setupLanding('pause-last.db', 1000);
     vi.setSystemTime(T0 + 2_000); // one full clamped tick at scale 1000 → clock T0+2e6 ≥ arrival (T0)
 
     const sim = await tickOnce(inst);
 
-    expect(sim.timeScale).toBe(1); // persisted on the sim_state row…
-    expect((await inst.db.select().from(schema.simState))[0].timeScale).toBe(1); // …and visible to the next snapshot
+    expect(sim.paused).toBe(true); // persisted on the sim_state row…
+    expect((await inst.db.select().from(schema.simState))[0].paused).toBe(true); // …and visible to the next snapshot
+    expect(sim.timeScale).toBe(1000); // speed preserved — no auto-slow anymore (ISS-041)
     expect((await inst.db.select().from(schema.planes))[0].status).toBe('available'); // landing itself unchanged
   });
 
-  it('a landing while another plane is still flying → no change', async () => {
-    const { inst, from, type } = await setupLanding('autoslow-other.db', 1000);
+  it('a landing while another plane is still flying → no pause', async () => {
+    const { inst, from, type } = await setupLanding('pause-other.db', 1000);
     // A second plane on the same route departing at T0 — arrives far after this tick's clock.
     await inst.db.insert(schema.planes).values({
       id: 'p-b', model: 'atr72', status: 'flying', fuel: type.maxFuel, maxFuel: type.maxFuel,
@@ -281,32 +344,51 @@ describe('auto-slow to 1× when the last plane lands (ISS-011)', () => {
     vi.setSystemTime(T0 + 2_000);
     const sim = await tickOnce(inst);
 
-    expect(sim.timeScale).toBe(1000); // p-b still in flight — no auto-slow
+    expect(sim.paused).toBe(false); // p-b still in flight — no pause (nothing would auto-unpause it)
+    expect(sim.timeScale).toBe(1000);
     const byId = new Map((await inst.db.select().from(schema.planes)).map((p) => [p.id, p.status]));
     expect(byId.get('plane-starter')).toBe('available'); // the starter did land…
     expect(byId.get('p-b')).toBe('flying'); // …but the fleet is not idle
   });
 
-  it('already at 1× → stays 1', async () => {
-    const { inst } = await setupLanding('autoslow-one.db', 1);
+  it('last plane lands at scale 1 → pauses anyway, scale untouched', async () => {
+    const { inst } = await setupLanding('pause-one.db', 1);
     vi.setSystemTime(T0 + 2_000); // one tick at scale 1 advances 2e3 game ms — past the T0 arrival
 
     const sim = await tickOnce(inst);
 
+    expect(sim.paused).toBe(true);
     expect(sim.timeScale).toBe(1);
     expect((await inst.db.select().from(schema.planes))[0].status).toBe('available');
   });
 
+  it('a chained plane does NOT trigger the last-plane pause (ISS-043)', async () => {
+    const { inst } = await setupLanding('pause-chain.db', 1000); // full tank, arrival exactly T0
+    // A queued next hop with plenty of fuel → chains on landing instead of grounding.
+    await inst.db.update(schema.planes)
+      .set({ queue: JSON.stringify(['EDDV']) })
+      .where(eq(schema.planes.id, 'plane-starter'));
+
+    vi.setSystemTime(T0 + 2_000); // one full clamped tick at scale 1000 → clock T0+2e6 ≥ arrival (T0)
+    const sim = await tickOnce(inst);
+
+    expect(sim.paused).toBe(false); // still flying after the chain — no premature pause…
+    const plane = (await inst.db.select().from(schema.planes))[0];
+    expect(plane.status).toBe('flying'); // …the fresh select in tickOnce counts it as airborne
+    expect(plane.destIcao).toBe('EDDV');
+  });
+
   it('paused sim with all planes landed → no change', async () => {
-    const inst = await freshDb('autoslow-paused.db');
+    const inst = await freshDb('pause-paused.db');
     // The fleet is fully grounded (the seeded starter) — a paused tick must not touch the
-    // scale even though "no plane in flight" holds: the trigger requires a landing this tick.
+    // controls even though "no plane in flight" holds: the trigger requires a landing this tick.
     await inst.db.update(schema.simState).set({ timeScale: 1000, paused: true });
 
     vi.setSystemTime(T0 + 5_000);
     const sim = await tickOnce(inst);
 
-    expect(sim.timeScale).toBe(1000); // no landing processed while paused → trigger never fires
+    expect(sim.paused).toBe(true); // no landing processed while paused → trigger never fires
+    expect(sim.timeScale).toBe(1000);
     expect((await inst.db.select().from(schema.planes))[0].status).toBe('available');
   });
 });

lib/sim/engine.ts

@@ -5,6 +5,7 @@ import * as schema from '@/lib/db/schema';
 import { loadAirportsGeoJson } from '@/lib/airports';
 import { haversineKm } from '@/lib/geo';
 import { PLANE_TYPES } from '@/lib/game/catalog';
+import { parseIcaoQueue } from '@/lib/game/state';
 import {
   generatePackage,
   MARKET_TARGET_OPEN_PACKAGES,
@@ -12,7 +13,7 @@ import {
   type Rng,
   type SeedAirport,
 } from '@/lib/game/seed';
-import { arrivalTimeFor, fuelAtWeighted } from './movement';
+import { arrivalTimeFor, fuelAtWeighted, requiredFuelFor } from './movement';
 
 // Server-authoritative sim engine (v0.7.0) — tick-on-read: there is NO background
 // timer. Every read/action endpoint calls tickNow() first; the clock advances by
@@ -74,8 +75,8 @@ export async function tickOnce(inst: GameDb): Promise<schema.SimStateRow> {
   let landedThisTick = 0;
   if (advanceMs > 0) {
     await expirePackages(inst, clockMs);
-    // ISS-011: remember the landings so the tick can auto-slow to 1× when this was
-    // the last plane in flight.
+    // ISS-041: remember the landings so the tick can pause when this was the last
+    // plane in flight.
     landedThisTick = await deliverPackages(inst, clockMs);
     await spawnOpenPackages(inst, clockMs);
     // AFTER delivery on purpose: a plane that just landed gets work spawned
@@ -83,17 +84,18 @@ export async function tickOnce(inst: GameDb): Promise<schema.SimStateRow> {
     await spawnCoveragePackages(inst, clockMs);
   }
 
-  const sets: Partial<Pick<schema.SimStateRow, 'clockMs' | 'lastRealTickMs' | 'timeScale'>> = {
+  const sets: Partial<Pick<schema.SimStateRow, 'clockMs' | 'lastRealTickMs' | 'timeScale' | 'paused'>> = {
     clockMs,
     lastRealTickMs: nowMs,
   };
-  // Auto-slow (ISS-011): when ≥1 plane landed this tick and NO plane remains in flight,
-  // drop the stored timeScale to 1× — persisted here so the UI slider reflects it on the
-  // next snapshot. Arrival-triggered by design: a grounded fleet at high scale is left
-  // alone (the player speeds up manually again; there is no auto-restore).
-  if (landedThisTick > 0 && !sim.paused) {
+  // Pause on landing (ISS-041): when ≥1 plane landed this tick and NO plane remains in flight,
+  // pause the sim WITHOUT touching timeScale — speed is preserved for the next dispatch.
+  // Arrival-triggered by design: a grounded fleet at high scale is left alone (there is no
+  // auto-resume except starting a flight; see flyPlane). A paused tick never processes landings
+  // (advanceMs === 0), so the trigger can only fire on an advancing tick.
+  if (landedThisTick > 0) {
     const flying = await inst.db.select().from(schema.planes).where(eq(schema.planes.status, 'flying'));
-    if (flying.length === 0) sets.timeScale = MIN_TIME_SCALE;
+    if (flying.length === 0) sets.paused = true;
   }
 
   // Persist lastRealTickMs even when nothing advanced — it is the tick anchor.
@@ -121,12 +123,17 @@ export async function expirePackages(inst: GameDb, clockMs: number): Promise<num
 }
 
 // Finalize in-flight planes whose arrival time has passed (v0.12.0 delivery):
-// ground the plane at its dest_icao with its remaining fuel, then for every
-// package bound to it and destined for that airport — 'loaded' ones still inside
-// their deadline are delivered (cash += reward + reputation gain per package),
-// 'expired' ones just unbind (no reward). Packages destined elsewhere stay loaded
-// on the plane for a later leg. Idempotent — a finalized plane leaves the
-// 'flying' state, so it can never be awarded twice. Returns planes landed.
+// for every package bound to the plane and destined for its dest_icao — 'loaded'
+// ones still inside their deadline are delivered (cash += reward + reputation
+// gain per package), 'expired' ones just unbind (no reward). Packages destined
+// elsewhere stay loaded on the plane for a later leg. Then (v0.25.0, ISS-043)
+// auto-chain: if the queue holds legs and fuel covers the first one, start it
+// immediately from the arrival airport; otherwise ground the plane there with
+// its remaining fuel (a short tank keeps the queue intact for refuel + re-dispatch).
+// Idempotent — a finalized plane either leaves the 'flying' state or starts a NEW
+// leg whose own arrival is in the future, so it can never be awarded twice.
+// Returns planes landed. NOTE: runs BEFORE tickOnce's pause check on purpose —
+// a chained plane counts as still flying there, so chaining never pauses early.
 export async function deliverPackages(inst: GameDb, clockMs: number): Promise<number> {
   const [planeRows, packageRows] = await Promise.all([
     inst.db.select().from(schema.planes),
@@ -148,19 +155,10 @@ export async function deliverPackages(inst: GameDb, clockMs: number): Promise<nu
     if (clockMs < arrivalTimeFor(p.departureSimTime, distanceKm, type.speedKmh)) continue;
 
     // Arrived: progress is exactly 1 here, so remaining fuel is the full-leg weighted burn.
-    await inst.db.update(schema.planes)
-      .set({
-        status: 'available',
-        locationIcao: to.icao,
-        lat: to.lat,
-        lon: to.lon,
-        fuel: fuelAtWeighted(p.fuel, type.burnPerKm, type.emptyWeightKg, type.maxFuel, distanceKm, 1),
-        departureSimTime: null,
-        destIcao: null,
-      })
-      .where(eq(schema.planes.id, p.id));
+    const landedFuel = fuelAtWeighted(p.fuel, type.burnPerKm, type.emptyWeightKg, type.maxFuel, distanceKm, 1);
 
-    // Deliver every bound package whose destination is the airport just reached.
+    // Deliver every bound package whose destination is the airport just reached —
+    // runs whether or not a queued leg chains next (ISS-043).
     const onBoard = packageRows.filter((pk) => pk.planeId === p.id && pk.destIcao === to.icao);
     for (const pk of onBoard) {
       if (pk.status === 'loaded' && clockMs <= pk.deadlineSimTime) {
@@ -177,6 +175,47 @@ export async function deliverPackages(inst: GameDb, clockMs: number): Promise<nu
         await inst.db.update(schema.packages).set({ planeId: null }).where(eq(schema.packages.id, pk.id));
       }
     }
+
+    // Auto-chain (ISS-043): with a non-empty queue and enough fuel for the first
+    // queued leg, start it immediately from `to` — same feasibility rule as flyPlane
+    // (requiredFuelFor is independent of current load). Otherwise ground here; an
+    // unknown ICAO in the queue simply cannot chain. The remaining queue is kept
+    // intact either way so a grounded plane can refuel and re-dispatch.
+    const queue = parseIcaoQueue(p.queue);
+    let chainedTo: string | null = null;
+    if (queue.length > 0) {
+      const nextDest = queue[0];
+      const next = byIcao.get(nextDest); // unknown ICAO in the queue → cannot chain
+      if (next && requiredFuelFor(type.burnPerKm, type.emptyWeightKg, type.maxFuel, haversineKm(to.lat, to.lon, next.lat, next.lon)) <= landedFuel) {
+        queue.shift();
+        chainedTo = nextDest;
+      }
+    }
+    await inst.db.update(schema.planes)
+      .set(
+        chainedTo
+          ? {
+              status: 'flying',
+              locationIcao: to.icao,
+              lat: to.lat,
+              lon: to.lon,
+              fuel: landedFuel,
+              destIcao: chainedTo,
+              departureSimTime: clockMs, // the arrival instant — position is exactly `to`
+              queue: JSON.stringify(queue),
+            }
+          : {
+              status: 'available',
+              locationIcao: to.icao,
+              lat: to.lat,
+              lon: to.lon,
+              fuel: landedFuel,
+              departureSimTime: null,
+              destIcao: null,
+              queue: JSON.stringify(queue),
+            },
+      )
+      .where(eq(schema.planes.id, p.id));
     n++;
   }
   return n;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "flight-ops",
-  "version": "0.22.2",
+  "version": "0.27.1",
   "private": true,
   "scripts": {
     "dev": "next dev -p 3000",