Integrate Imperial Homeworld movement with Ornithopter

game/ornithopter-homeworld.ts

@@ -0,0 +1,45 @@
+import type { MovementCohort } from './ornithopter';
+
+export type ImperialFlightWorld = {
+  id: string;
+  native: string;
+  forces: Record<string, { normal: number; elite: number }>;
+};
+const imperialWorlds = ['homeworld:emperor', 'homeworld:emperor:salusa'];
+
+/** Native World counters come only from their actual typed custody, never the
+ * aggregate reserve total. World IDs are cohort keys without a sector suffix. */
+export function imperialFlightPools(
+  boardForces: Record<string, number>,
+  boardElites: Record<string, number>,
+  worlds: readonly ImperialFlightWorld[],
+  owner: string,
+): { forces: Record<string, number>; elites: Record<string, number> } {
+  const forces = { ...boardForces }, elites = { ...boardElites };
+  for (const id of imperialWorlds) {
+    delete forces[id]; delete elites[id];
+    const world = worlds.find(candidate => candidate.id === id && candidate.native === owner);
+    if (!world) continue;
+    const group = world.forces[owner];
+    if (!group || !Number.isSafeInteger(group.normal) || group.normal < 0 ||
+        !Number.isSafeInteger(group.elite) || group.elite < 0 ||
+        !Number.isSafeInteger(group.normal + group.elite))
+      throw new RangeError('Imperial flight needs actual nonnegative typed Homeworld custody.');
+    forces[id] = group.normal + group.elite;
+    elites[id] = group.elite;
+  }
+  return { forces, elites };
+}
+
+/** Older flights blocked all World moves, so their then-current World pools
+ * are still unmoved. A fresh aware cohort must retain its depleted quotas. */
+export function imperialFlightCohort(
+  cohort: MovementCohort,
+  aware: boolean,
+  worlds: readonly ImperialFlightWorld[],
+  owner: string,
+): MovementCohort {
+  const pools = aware ? { forces: { ...cohort.forces }, elites: { ...cohort.elites } }
+    : imperialFlightPools(cohort.forces, cohort.elites, worlds, owner);
+  return { ...pools, ...(cohort.noField ? { noField: { ...cohort.noField } } : {}) };
+}