feat(api): ship + research endpoints queue tasks with lead + helpers; mission accept is instant and free (#44)

app/api/ship/upgrade/route.ts

@@ -1,8 +1,14 @@
 import { getGameDb } from '@/lib/db/client'
-import { ShipError, upgradeSystem } from '@/lib/game/ship'
+import { parseCrewTeam } from '@/app/api/crew-team'
+import { checkUpgradePreconditions, getShipState, ShipError } from '@/lib/game/ship'
+import { queueStateFromSave, saveInventory, saveTaskRow } from '@/lib/game/save'
+import { queueTask, TaskError } from '@/lib/game/tasks'
 
-// Level up a built ship system by one (capped at max level). Body: { "systemId": number }.
-// Costs inventory items + a turn; returns the fresh ship state.
+// Level up a built ship system by one (capped at max level): assign the crew team (lead +
+// helpers) and queue the SHIP_UPGRADE task — the cost (`level` units of any resource) is
+// deducted at queue time and the level-up lands when the task completes on the turn tick
+// (runTurn). Body: { systemId, leadCrewId, helperCrewIds? }. Queueing spends no turn;
+// returns the same fresh ship state the instant action returned.
 export async function POST(req: Request) {
   let body: unknown
   try {
@@ -15,12 +21,21 @@ export async function POST(req: Request) {
   if (typeof systemId !== 'number' || !Number.isInteger(systemId)) {
     return Response.json({ error: 'systemId must be an integer' }, { status: 400 })
   }
+  const team = parseCrewTeam(body)
+  if ('error' in team) {
+    return Response.json({ error: team.error }, { status: team.status })
+  }
 
   try {
     const db = await getGameDb()
-    return Response.json(await upgradeSystem(db, systemId))
+    await checkUpgradePreconditions(db, systemId) // existing pre-checks: 404 unknown · 409 not built / max level
+    const state = await queueStateFromSave(db)
+    const { task, inventory } = queueTask(state, { type: 'SHIP_UPGRADE', payload: { systemId }, leadCrewId: team.leadCrewId, helperCrewIds: team.helperCrewIds })
+    await saveTaskRow(db, task)
+    await saveInventory(db, inventory) // the cost was deducted at queue time
+    return Response.json(await getShipState(db))
   } catch (err) {
-    if (err instanceof ShipError) {
+    if (err instanceof ShipError || err instanceof TaskError) {
       return Response.json({ error: err.message }, { status: err.status })
     }
     throw err