diff --git a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts
index 05e1da13a..e47b1a4ac 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts
+++ b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts
@@ -76,7 +76,11 @@ function directNativeKindText(kind: NativeKind): string {
 }
 
 /** 模型调用失败的可见说明：有原生分类看原生分类，没有就看平台层那一层的分类。 */
-function directModelCallText(kind: ModelCallKind): string {
+function directModelCallText(kind: ModelCallKind | null | undefined): string {
+  // 载荷跨 IPC 没有运行时校验：`kind` 缺失时按"没有分类"兜底，别让整条事件订阅在这一步抛错。
+  if (!kind) {
+    return '智能服务执行失败，请稍后重试';
+  }
   switch (kind.type) {
     case 'responseTimedOut':
       return '等待模型回执超时，本轮未完成；请稍后重试';