diff --git a/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx b/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
index 947a8c4ac..1f8d92924 100644
--- a/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
+++ b/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
@@ -11,6 +11,7 @@ import {
 import type { AuthUser } from '../../../../packages/shared/src/contracts/auth';
 import brandIcon from '../../../../packages/shared/src/icons/taonier-product-ip.png';
 import { ErrorReportNotice } from '../components/error-report/ErrorReportNotice';
+import { ClientActionError } from '../services/clientActionError';
 import {
   getClientAuthErrorMessage,
   loginClientWithPassword,
@@ -18,6 +19,7 @@ import {
   logoutClientAuthSession,
   normalizeAuthPhoneInput,
   readClientAuthState,
+  resolveClientAuthFailure,
   sendClientPhoneLoginCode,
   subscribeClientAuthState,
 } from '../services/clientAuth';
@@ -34,7 +36,6 @@ import {
 import {
   captureClientError,
   installWebviewLogBridge,
-  shouldCaptureClientError,
 } from '../services/errorReporting';
 import {
   beginPlatformSessionClearTransition,
@@ -347,12 +348,18 @@ export function AuthenticatedClient({
       setCodeCooldownSeconds(Math.max(0, Math.floor(response.cooldownSeconds)));
       setLoginStatus(`验证码已发送，${response.expiresInSeconds} 秒内有效`);
     } catch (error) {
-      if (shouldCaptureClientError(error))
-        void captureClientError(error, {
-          source: 'auth',
-          action: 'send-login-code',
-        });
-      setLoginStatus(error instanceof Error ? error.message : String(error));
+      // 业务拒绝（手机号格式 / 发码限流等）只给提示；系统变体与未识别变体带上文交给错误池。
+      const failure = resolveClientAuthFailure(error, '发送验证码失败');
+      setLoginStatus(failure.message);
+      if (failure.kind === 'report') {
+        void captureClientError(
+          new ClientActionError(
+            failure.message,
+            { source: 'auth', action: 'send-login-code' },
+            error,
+          ),
+        );
+      }
     } finally {
       setCodeBusy(false);
     }
@@ -417,9 +424,19 @@ export function AuthenticatedClient({
       setCode('');
       setPassword('');
     } catch (error) {
-      if (shouldCaptureClientError(error))
-        void captureClientError(error, { source: 'auth', action: 'login' });
-      setLoginStatus(getClientAuthErrorMessage(error, '登录失败'));
+      // 预期业务拒绝（密码输错 / 密码长度不合规 / 手机号格式等）在这里消化掉，永不进错误池；
+      // 真故障与未识别变体带上文交给错误池，指纹仍与显式采集时一致。
+      const failure = resolveClientAuthFailure(error, '登录失败');
+      setLoginStatus(failure.message);
+      if (failure.kind === 'report') {
+        void captureClientError(
+          new ClientActionError(
+            failure.message,
+            { source: 'auth', action: 'login' },
+            error,
+          ),
+        );
+      }
     } finally {
       setLoginBusy(false);
     }
diff --git a/apps/ai-game-creator-shell/src/services/clientAuth.ts b/apps/ai-game-creator-shell/src/services/clientAuth.ts
index b1840ab85..2af0f6ce7 100644
--- a/apps/ai-game-creator-shell/src/services/clientAuth.ts
+++ b/apps/ai-game-creator-shell/src/services/clientAuth.ts
@@ -1,6 +1,6 @@
 import type { AuthUser } from '../../../../packages/shared/src/contracts/auth';
 import { resolveTauriInvoke } from '../app/tauri';
-import { isClientAuthError } from './clientAuthError';
+import { clientAuthErrorNotice, isClientAuthError } from './clientAuthError';
 import { subscribeTauriEvent } from './tauriEventSubscription';
 
 /** Rust 认证态事件：只承载状态投影，不含 token 或 refresh 凭据。 */
@@ -52,6 +52,30 @@ export function getClientAuthErrorMessage(error: unknown, fallback: string) {
   return fallback;
 }
 
+/**
+ * 登录 / 发码失败的调用方分流：`notice` 是"用户自己能改或本来就该按未登录处理"的变体，
+ * 只显示 Rust 文案；`report` 是系统变体 / 未识别变体 / 非结构化拒绝，显示文案之外还要带上下文
+ * 交给错误池（见 [`captureClientError`](./errorReporting.ts)）。
+ *
+ * 判定只看类型化的 `type`，不做任何文案匹配；这条规则是"输错一次密码不该被引导上报"的判据。
+ */
+export type ClientAuthFailureResolution =
+  | { kind: 'notice'; message: string }
+  | { kind: 'report'; message: string };
+
+export function resolveClientAuthFailure(
+  error: unknown,
+  fallback: string,
+): ClientAuthFailureResolution {
+  const structured = isClientAuthError(error);
+  const notice = structured ? clientAuthErrorNotice(structured) : null;
+  if (notice !== null) return { kind: 'notice', message: notice };
+  return {
+    kind: 'report',
+    message: getClientAuthErrorMessage(error, fallback),
+  };
+}
+
 type RustAuthStateView = {
   status?: string;
   user?: AuthUser | null;
diff --git a/apps/ai-game-creator-shell/src/services/errorReporting.ts b/apps/ai-game-creator-shell/src/services/errorReporting.ts
index 7348b51bf..080bb2e4a 100644
--- a/apps/ai-game-creator-shell/src/services/errorReporting.ts
+++ b/apps/ai-game-creator-shell/src/services/errorReporting.ts
@@ -25,16 +25,6 @@ export type DiagnosticLogFile = { name: string; content: string };
 
 type WebviewLogLevel = 'debug' | 'info' | 'warn' | 'error' | 'log';
 
-export function shouldCaptureClientError(error: unknown) {
-  if (!error || typeof error !== 'object') return true;
-  const candidate = error as { status?: unknown; networkError?: unknown };
-  if (candidate.networkError === true) return true;
-  if (typeof candidate.status === 'number') {
-    return candidate.status === 408 || candidate.status >= 500;
-  }
-  return true;
-}
-
 export async function invokeDiagnostic<T>(
   invokeFn: (command: string, args?: Record<string, unknown>) => Promise<T>,
   command: string,
diff --git a/apps/ai-game-creator-shell/tests/appSurface/auth.suite.ts b/apps/ai-game-creator-shell/tests/appSurface/auth.suite.ts
index a12fc9b44..8fc0df66a 100644
--- a/apps/ai-game-creator-shell/tests/appSurface/auth.suite.ts
+++ b/apps/ai-game-creator-shell/tests/appSurface/auth.suite.ts
@@ -228,13 +228,14 @@ export function registerAuthTests() {
     });
   });
 
-  it('shows the backend reason when the password login is rejected', async () => {
+  it('shows the typed business reason when the password login is rejected', async () => {
     const invoke = vi.fn(async (command: string) => {
       if (command === 'read_client_auth_state') {
         return { status: 'unauthenticated' };
       }
       if (command === 'login_client_with_password') {
-        throw new Error('手机号或密码错误');
+        // Rust 命令的结构化拒绝：前端只按 `type` 分流，不解析文案。
+        throw { type: 'phoneOrPasswordMismatch', message: '手机号或密码错误' };
       }
       return null;
     });
@@ -259,9 +260,10 @@ export function registerAuthTests() {
         return { status: 'unauthenticated' };
       }
       if (command === 'login_client_with_phone_code') {
-        throw new Error(
-          'network-error: 无法连接登录服务，请确认配套后端或 API 代理已启动后重试',
-        );
+        throw {
+          type: 'authNetworkUnavailable',
+          message: '无法连接登录服务，请确认配套后端或 API 代理已启动后重试',
+        };
       }
       return null;
     });
@@ -270,7 +272,7 @@ export function registerAuthTests() {
 
     expect(
       await screen.findByText(
-        'network-error: 无法连接登录服务，请确认配套后端或 API 代理已启动后重试',
+        '无法连接登录服务，请确认配套后端或 API 代理已启动后重试',
       ),
     ).not.toBeNull();
     expect(document.body.textContent).not.toContain('ECONNREFUSED');
diff --git a/apps/ai-game-creator-shell/tests/clientAuthHost.test.ts b/apps/ai-game-creator-shell/tests/clientAuthHost.test.ts
index 4b10a4a2f..68d8a612a 100644
--- a/apps/ai-game-creator-shell/tests/clientAuthHost.test.ts
+++ b/apps/ai-game-creator-shell/tests/clientAuthHost.test.ts
@@ -17,6 +17,7 @@ import {
   normalizeAuthPhoneInput,
   readClientAuthState,
   refreshClientAuthSession,
+  resolveClientAuthFailure,
   sendClientPhoneLoginCode,
 } from '../src/services/clientAuth';
 
@@ -185,3 +186,52 @@ test('错误文案优先使用服务端原因，缺失时回落到调用方文
   ).toBe('手机号或密码错误');
   expect(getClientAuthErrorMessage('', '登录失败')).toBe('登录失败');
 });
+
+test('登录失败分流只看类型化变体：业务拒绝给提示，系统与未识别变体才进池', () => {
+  expect(
+    resolveClientAuthFailure(
+      { type: 'phoneOrPasswordMismatch', message: '手机号或密码错误' },
+      '登录失败',
+    ),
+  ).toEqual({ kind: 'notice', message: '手机号或密码错误' });
+  expect(
+    resolveClientAuthFailure(
+      {
+        type: 'passwordEntryInputRejected',
+        message: '密码长度需要在 6 到 128 位之间',
+      },
+      '登录失败',
+    ),
+  ).toEqual({ kind: 'notice', message: '密码长度需要在 6 到 128 位之间' });
+  // 会话 401/403 按"未登录"处理：给提示，但不进错误池。
+  expect(
+    resolveClientAuthFailure(
+      { type: 'sessionAuthorityRejected', message: '登录已失效，请重新登录' },
+      '登录失败',
+    ),
+  ).toEqual({ kind: 'notice', message: '登录已失效，请重新登录' });
+  // 系统变体与未识别变体：显示 Rust 文案，同时交给错误池。
+  expect(
+    resolveClientAuthFailure(
+      { type: 'authNetworkUnavailable', message: '无法连接登录服务' },
+      '登录失败',
+    ),
+  ).toEqual({ kind: 'report', message: '无法连接登录服务' });
+  expect(
+    resolveClientAuthFailure(
+      { type: 'brandNewRejection', message: '新变体' },
+      '登录失败',
+    ),
+  ).toEqual({ kind: 'report', message: '新变体' });
+  // 非结构化：裸字符串保留原文，其它形状回落调用方文案，不显示 `[object Object]`。
+  expect(
+    resolveClientAuthFailure('network-error: 连接超时', '登录失败'),
+  ).toEqual({ kind: 'report', message: 'network-error: 连接超时' });
+  expect(
+    resolveClientAuthFailure(new Error('runner clear rejected'), '登录失败'),
+  ).toEqual({ kind: 'report', message: 'runner clear rejected' });
+  expect(resolveClientAuthFailure({ status: 500 }, '登录失败')).toEqual({
+    kind: 'report',
+    message: '登录失败',
+  });
+});