diff --git a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directCodexConversation.ts b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directCodexConversation.ts
index 1b28fdb4c..0069a3825 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directCodexConversation.ts
+++ b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directCodexConversation.ts
@@ -55,7 +55,10 @@ export function createDirectProjectTurnId() {
     // WebView 没有 crypto 时使用时间戳和页内序号。
   }
   if (/^[a-z0-9][a-z0-9-]{5,159}$/iu.test(randomId)) return randomId;
-  return `${Date.now().toString(36)}-${directProjectTurnSequence.toString(36)}`;
+  // 回退路径也要有实例内唯一性：时间戳 + 页内序号在多 WebView 同毫秒首轮时会撞车，
+  // clientTurnId 是 Rust 侧的项目级唯一与历史关联键，所以再补一段随机串。
+  const entropy = Math.random().toString(36).slice(2, 10);
+  return `${Date.now().toString(36)}-${directProjectTurnSequence.toString(36)}-${entropy}`;
 }
 
 export function directCodexConversationMessageId(