v1.2.0: planes.owner_id + ownership checks + per-player onboarding (ISS-108, ISS-109)

lib/game/seed.ts

@@ -360,19 +360,14 @@ function pickHub(airports: SeedAirport[]): SeedAirport {
   return airports.find((a) => a.icao === HUB_ICAO) ?? airports[0];
 }
 
-export function buildSeed(input: {
-  airports: SeedAirport[];
-  rng: Rng;
-  nowMs: number;
-}): SeedData {
-  const { airports, rng, nowMs } = input;
-  if (airports.length < 2) throw new Error('seed needs at least two airports');
-
+// v1.2.0 (ISS-108): the starter plane, extracted from buildSeed so per-player onboarding can reuse
+// it — same values as the fresh-install seed's plane (no RNG draws), only the id differs. The
+// caller stamps ownership (planes.owner_id) at insert time; this stays a pure SeedPlane.
+export function buildStarterPlane(airports: SeedAirport[], id: string): SeedPlane {
   const type = PLANE_TYPES[STARTER_MODEL];
   const hub = pickHub(airports);
-
-  const plane: SeedPlane = {
-    id: 'plane-starter',
+  return {
+    id,
     model: STARTER_MODEL,
     status: 'available',
     fuel: type.maxFuel, // starts full
@@ -384,6 +379,18 @@ export function buildSeed(input: {
     queue: [], // no queued legs on first run (v0.25.0)
     health: 100, // full health on first run (v0.39.0, ISS-069)
   };
+}
+
+export function buildSeed(input: {
+  airports: SeedAirport[];
+  rng: Rng;
+  nowMs: number;
+}): SeedData {
+  const { airports, rng, nowMs } = input;
+  if (airports.length < 2) throw new Error('seed needs at least two airports');
+
+  const plane = buildStarterPlane(airports, 'plane-starter');
+  const hub = pickHub(airports);
 
   // v0.65.0: the seed market is a full pool at the starter's home hub — the same per-airport
   // composition (POOL_BANDS) the runtime spawner maintains, so first run looks like any other tick.