fix: store embargoes as smallID numbers (drop string[] wart)

PlayerState.embargoes was string[] of stringified smallIDs — the
renderer parsed each entry with parseInt() to use as an array index.
Flagged in the integration handoff as something that should be number[].

Switch to number[] end-to-end: renderer type, relation-matrix derive
(no parseInt), PlayerView.setEmbargoSmallIDs / hasEmbargoAgainst
(numeric Array.includes, no String() temporaries), and GameView's
embargo translation pass. Also updates the PlayerView test that pinned
the old format.

src/client/render/frame/derive/relation-matrix.ts

@@ -67,8 +67,7 @@ export function buildRelationMatrix(
     }
 
     if (ps.embargoes) {
-      for (const eStr of ps.embargoes) {
-        const eID = parseInt(eStr, 10);
+      for (const eID of ps.embargoes) {
         if (eID > 0 && eID < RELATION_SIZE) {
           matrix[sid * RELATION_SIZE + eID] = RELATION_EMBARGO;
           matrix[eID * RELATION_SIZE + sid] = RELATION_EMBARGO;

src/client/render/types/renderer.ts

@@ -63,7 +63,7 @@ export interface PlayerState {
   hasSpawned: boolean;
   lastDeleteUnitTick: number;
   allies: number[];
-  embargoes: string[];
+  embargoes: number[];
   targets: number[];
   outgoingAttacks: AttackData[];
   incomingAttacks: AttackData[];