fix(SCOPONE-0008): complete iteration 1 remove ai lag

src/game/card-tracker.ts

@@ -1,5 +1,15 @@
 import { Card, Suit, SUITS } from './types';
 
+export interface CardTrackerSnapshot {
+  playedCardIds: string[];
+}
+
+function normalizeSnapshot(snapshot: CardTrackerSnapshot): CardTrackerSnapshot {
+  return {
+    playedCardIds: Array.from(new Set(snapshot.playedCardIds)),
+  };
+}
+
 /**
  * Tracks which cards have been played/captured during a round.
  * Used by AI to infer opponent hands WITHOUT cheating.
@@ -7,6 +17,27 @@ import { Card, Suit, SUITS } from './types';
 export class CardTracker {
   private played: Set<string> = new Set(); // card IDs that have been seen
 
+  constructor(snapshot?: CardTrackerSnapshot) {
+    if (snapshot) {
+      this.restoreSnapshot(snapshot);
+    }
+  }
+
+  static fromSnapshot(snapshot: CardTrackerSnapshot): CardTracker {
+    return new CardTracker(snapshot);
+  }
+
+  toSnapshot(): CardTrackerSnapshot {
+    return {
+      playedCardIds: [...this.played],
+    };
+  }
+
+  restoreSnapshot(snapshot: CardTrackerSnapshot): void {
+    const normalized = normalizeSnapshot(snapshot);
+    this.played = new Set(normalized.playedCardIds);
+  }
+
   /** Record a card being played to the table */
   trackPlay(card: Card): void {
     this.played.add(card.id);