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

src/game/ai.worker.ts

@@ -0,0 +1,79 @@
+import { chooseMove } from './ai';
+import {
+  AIWorkerChooseMoveRequest,
+  AIWorkerErrorMessage,
+  AIWorkerRequestMessage,
+  AIWorkerResponseMessage,
+} from './ai-worker-protocol';
+import { CardTracker } from './card-tracker';
+
+interface AIWorkerScope {
+  addEventListener(type: 'message', listener: (event: MessageEvent<AIWorkerRequestMessage>) => void): void;
+  postMessage(message: AIWorkerResponseMessage): void;
+}
+
+const workerScope = globalThis as unknown as AIWorkerScope;
+
+function serializeError(requestId: string, error: unknown): AIWorkerErrorMessage {
+  if (error instanceof Error) {
+    return {
+      type: 'error',
+      requestId,
+      error: {
+        message: error.message,
+        name: error.name,
+        stack: error.stack,
+      },
+    };
+  }
+
+  return {
+    type: 'error',
+    requestId,
+    error: {
+      message: typeof error === 'string' ? error : 'Unknown AI worker error',
+      name: 'Error',
+    },
+  };
+}
+
+async function handleChooseMove(request: AIWorkerChooseMoveRequest): Promise<void> {
+  const tracker = request.trackerSnapshot
+    ? CardTracker.fromSnapshot(request.trackerSnapshot)
+    : undefined;
+
+  try {
+    const move = await chooseMove(
+      request.state,
+      request.playerIdx,
+      request.difficulty,
+      tracker,
+      (progress) => {
+        workerScope.postMessage({
+          type: 'progress',
+          requestId: request.requestId,
+          progress,
+        });
+      },
+    );
+
+    workerScope.postMessage({
+      type: 'result',
+      requestId: request.requestId,
+      move,
+    });
+  } catch (error) {
+    workerScope.postMessage(serializeError(request.requestId, error));
+  }
+}
+
+workerScope.addEventListener('message', (event: MessageEvent<AIWorkerRequestMessage>) => {
+  const message = event.data;
+  if (message.type !== 'choose-move') {
+    return;
+  }
+
+  void handleChooseMove(message);
+});
+
+export {};