Implement Homeworld mechanics through Caladan reinforcement checkpoint

Connect typed Homeworld custody, transport, battle, income, revival and Caladan reinforcement flows with private multiplayer recovery and controls. Preserve the optimized test workflow and keep unfinished rules modes gated. Verified with 3682 offline tests, typecheck, lint, production build and 40 HTTP tests; existing saved games remain unchanged.

game/guild-ambassador-continuation.ts

@@ -1,4 +1,5 @@
 import { validAmbassadorResume } from './ambassador-resume';
+import { ambassadorPhaseAllowed } from './ambassador-phase';
 import type { Game } from './engine';
 import type { GuildAmbassadorShipment } from './guild-ambassador';
 import { validLocation, territory } from './board';
@@ -18,6 +19,11 @@ export type GuildAmbassadorArrivalContext = Pick<
   | 'players'
   | 'pendingAmbassador'
   | 'ecazAmbassadors'
+  | 'homeworlds'
+  | 'homeworldRevivalReturn'
+  | 'homeworldRevivalProgress'
+  | 'homeworldVictoryReinforcement'
+  | 'lastBattleContext'
 >;
 export type GuildAmbassadorArrivalNext =
   | 'intrusion'
@@ -61,7 +67,7 @@ export function validateGuildAmbassadorArrivalContext(
     g.status === 'playing' &&
       whole(g.turn) &&
       g.turn > 0 &&
-      (g.phase === 1 || g.phase === 5) &&
+      ambassadorPhaseAllowed(g) &&
       Array.isArray(g.players) &&
       g.players.every((p) => id(p.id)) &&
       new Set(g.players.map((p) => p.id)).size === g.players.length &&
@@ -151,7 +157,11 @@ export function validateGuildAmbassadorArrivalContext(
       bg?.faction === 'beneGesserit' &&
         bg.id !== order.player &&
         g.players.filter((p) => p.faction === 'beneGesserit').length === 1 &&
-        advisorArrival.amount === 1 &&
+        (advisorArrival.amount === 1 ||
+          (advisorArrival.amount === 2 &&
+            !!g.homeworlds?.custody &&
+            advisorArrival.territory === 'polar_sink' &&
+            advisorArrival.sector === 0)) &&
         advisorArrival.elite === 0 &&
         boardLocation(advisorArrival.territory, advisorArrival.sector) &&
         (advisorArrival.territory === order.territory ||
@@ -159,6 +169,9 @@ export function validateGuildAmbassadorArrivalContext(
             advisorArrival.sector === 0)),
       'The saved accompanying advisor does not match this shipment destination and owner.',
     );
+    // This is a committed arrival: the batch itself or later child effects can
+    // lower Wallach below high. Rechecking today's allowance would invalidate
+    // legal historical receipts. Declaration/commit prove the original limit.
   }
   return { order, ...(advisorArrival ? { advisorArrival } : {}) };
 }