修复总控草稿恢复后被清空

- 仅在非纯聊天模式清空聊天编辑器

- 保留纯聊天模式恢复的会话草稿

apps/ai-game-creator-shell/src/App.tsx

@@ -4374,8 +4374,9 @@ export function App({
         chatComposerRef.current?.replaceText(
           readSupervisorChatDraft(openedProject.projectPath),
         );
+      } else {
+        clearChatComposer();
       }
-      clearChatComposer();
       setManifest(openedProject.manifest);
       setProjectFiles([]);
       setProjectCheckpoints([]);