diff --git a/apps/ai-game-creator-shell/src/services/clientAuth.ts b/apps/ai-game-creator-shell/src/services/clientAuth.ts
index de7369bcb..19c751d20 100644
--- a/apps/ai-game-creator-shell/src/services/clientAuth.ts
+++ b/apps/ai-game-creator-shell/src/services/clientAuth.ts
@@ -37,25 +37,26 @@ function requireInvoke() {
 }
 
 /**
- * 认证命令的统一入口：把 Rust 结构化拒绝转成 JS 侧的 `ClientAuthFailure`，
- * 非结构化拒绝（Tauri / JS 运行时自己的错误）原样抛出。
+ * 认证命令的统一入口：把 Tauri 的拒绝按 ts-rs 映射转成 JS 侧的 `ClientAuthFailure`。
  *
- * 只判 `type` 是不是字符串（这是 ts-rs 判别联合的稳定键），**不校验字段名、不读文案判断、
- * 不兜底文案**。要不要上报、给不给用户提示，由调用方在 catch 里按 `payload.type` 决定。
+ * **信任映射，不做运行时形状嗅探**：Rust 与 TS 同包发布，认证命令的拒绝就是
+ * `ClientAuthError`；出现别的形状属于 Tauri / Rust 侧的缺陷，调用方 `switch` 的 `default`
+ * 分支仍会把它抛出去上报。也不读文案判断、不兜底文案。
  */
 async function invokeClientAuth<T>(
   command: string,
   args?: Record<string, unknown>,
 ): Promise<T> {
+  // 认证桥未安装是我们自己的失败关闭错误，不是命令拒绝：放在 try 之外，原样抛出。
+  const invoke = requireInvoke();
   try {
-    const invoke = requireInvoke();
     // 不带参数时保持 `invoke(command)` 的单参调用形态，别给命令多塞一个 undefined。
     return args === undefined
       ? await invoke<T>(command)
       : await invoke<T>(command, args);
   } catch (error) {
-    const rejection = error as { type?: unknown; message?: unknown };
-    if (typeof rejection?.type !== 'string') throw error;
+    // `message` 只是给 Error 用的可展示字符串，不是分流判据；分流只按 `payload.type`。
+    const rejection = error as { message?: unknown };
     throw new ClientAuthFailure(
       typeof rejection.message === 'string' ? rejection.message : '',
       error as ClientAuthError,
diff --git a/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx b/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx
index 3ff8a3cec..435d56e37 100644
--- a/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx
+++ b/apps/ai-game-creator-shell/tests/authFailureReporting.test.tsx
@@ -132,7 +132,7 @@ describe('认证失败的上报判据', () => {
     }
   });
 
-  it('非结构化拒绝原样抛出，由 unhandledrejection 兜底上报', async () => {
+  it('Tauri 的意外拒绝形状也被包装后原样抛出上报', async () => {
     const uninstall = installUnhandledRejectionBridge();
     try {
       await submitPasswordLogin(async (command) => {
@@ -147,7 +147,8 @@ describe('认证失败的上报判据', () => {
 
       await waitFor(() => expect(reportCalls()).toHaveLength(1));
       expect(reportCalls()[0]?.[1]).toMatchObject({
-        source: 'unhandledrejection',
+        source: 'auth',
+        action: 'login_client_with_password',
         message: 'IPC 桥接不可用',
       });
     } finally {
diff --git a/apps/ai-game-creator-shell/tests/clientAuthFailure.test.ts b/apps/ai-game-creator-shell/tests/clientAuthFailure.test.ts
index 4f87031b9..c093d98a2 100644
--- a/apps/ai-game-creator-shell/tests/clientAuthFailure.test.ts
+++ b/apps/ai-game-creator-shell/tests/clientAuthFailure.test.ts
@@ -115,11 +115,8 @@ describe('ClientAuthFailure', () => {
     expect((failure as Error).message).toBe('请输入正确的手机号');
   });
 
-  it('非结构化拒绝原样抛出，不包装也不改写', async () => {
-    const rejection = new Error('需要在 Tauri App 内登录');
-    installInvoke(async () => {
-      throw rejection;
-    });
+  it('认证桥未安装时保持原样抛出，不包装成命令失败', async () => {
+    delete window.__TAURI__;
 
     await expect(
       loginClientWithPassword(
@@ -127,7 +124,28 @@ describe('ClientAuthFailure', () => {
         'secret',
         'https://dev.genarrative.world',
       ),
-    ).rejects.toBe(rejection);
+    ).rejects.toThrow('需要在 Tauri App 内登录');
+  });
+
+  it('Tauri 的意外形状也按映射包装：不做嗅探，但仍是可上报的 Error', async () => {
+    const rejection = new Error('IPC 桥接异常');
+    installInvoke(async () => {
+      throw rejection;
+    });
+
+    const failure = await loginClientWithPassword(
+      '13800000000',
+      'secret',
+      'https://dev.genarrative.world',
+    ).catch((error: unknown) => error);
+
+    expect(failure).toBeInstanceOf(ClientAuthFailure);
+    expect((failure as Error).message).toBe('IPC 桥接异常');
+    expect((failure as ClientAuthFailure).payload).toBe(rejection);
+    expect((failure as ClientAuthFailure).context).toEqual({
+      source: 'auth',
+      action: 'login_client_with_password',
+    });
   });
 
   it('结构化拒绝缺 message 时 Error.message 为空，不造兜底文案', async () => {