diff --git a/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx b/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
index a35b82a5d..0eb882bd8 100644
--- a/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
+++ b/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
@@ -459,6 +459,10 @@ export function AuthenticatedClient({
           }
           default: {
             expectNever(failure);
+            // 结构化映射外（Tauri 级失败等）：仍然原样抛出上报，但界面给一行泛化提示，别停在空白状态。
+            const text = '登录服务返回了未识别的错误，请重试或提交错误报告';
+            setAuthCheckError(text);
+            setLoginStatus(text);
             throw error;
           }
         }
@@ -723,6 +727,7 @@ export function AuthenticatedClient({
         }
         default: {
           expectNever(failure);
+          setLoginStatus('登录服务返回了未识别的错误，请重试或提交错误报告');
           throw error;
         }
       }
@@ -955,6 +960,7 @@ export function AuthenticatedClient({
         }
         default: {
           expectNever(failure);
+          setLoginStatus('登录服务返回了未识别的错误，请重试或提交错误报告');
           throw error;
         }
       }
diff --git a/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx b/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx
index 1b7c2bd4e..b088f8435 100644
--- a/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx
+++ b/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx
@@ -172,6 +172,12 @@ describe('认证失败的上报判据', () => {
         source: 'unhandledrejection',
         message: 'IPC 桥接不可用',
       });
+      // 映射外的拒绝仍然上报，但界面要给一行泛化提示，不能停在无解释的登录页。
+      expect(
+        await screen.findByText(
+          '登录服务返回了未识别的错误，请重试或提交错误报告',
+        ),
+      ).not.toBeNull();
     } finally {
       uninstall();
     }