测试替身对齐宿主的按身份判定：alreadyDispatched 只认正在跑那一条

- hostQueue 记录被放行的 clientTurnId，cancel 只在身份一致时回 alreadyDispatched，其余回 notFound
- 与宿主 remove_pending_turn（按 active_turn.turn_id 比对）保持一致，避免复用该替身时掩盖 notFound 分支

apps/ai-game-creator-shell/tests/appSurface/chat-composer.suite.ts

@@ -244,11 +244,14 @@ function hostQueue(
 ) {
   const queued: Array<{ clientTurnId: string; userItem: unknown }> = [];
   let running = alreadyRunning;
+  /** 正在跑那一轮的回合身份：与宿主一致，`alreadyDispatched` 只认它（不是"随便哪一轮在跑"）。 */
+  let dispatchedClientTurnId: string | null = null;
   const dispatchHeadIfIdle = () => {
     if (running) return;
     const head = queued.shift();
     if (!head) return;
     running = true;
+    dispatchedClientTurnId = head.clientTurnId;
     harness.emitDirectThreadEvents(
       {
         type: 'queue.removed',
@@ -283,7 +286,11 @@ function hostQueue(
       const index = queued.findIndex(
         (item) => item.clientTurnId === clientTurnId,
       );
-      if (index < 0) return running ? 'alreadyDispatched' : 'notFound';
+      if (index < 0) {
+        return dispatchedClientTurnId === clientTurnId
+          ? 'alreadyDispatched'
+          : 'notFound';
+      }
       queued.splice(index, 1);
       harness.emitDirectThreadEvents({
         type: 'queue.removed',
@@ -296,6 +303,7 @@ function hostQueue(
     /** 回合收尾：宿主在占用释放那一刻踢一脚，队首接上。 */
     complete(status = 'completed') {
       running = false;
+      dispatchedClientTurnId = null;
       harness.emitDirectThreadEvents({ type: 'turn.completed', status, at: 4 });
       dispatchHeadIfIdle();
     },