diff --git a/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx b/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
index 1f8d92924..82553f8e1 100644
--- a/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
+++ b/apps/ai-game-creator-shell/src/app/AuthenticatedClient.tsx
@@ -327,6 +327,28 @@ export function AuthenticatedClient({
     return () => window.clearInterval(timer);
   }, [codeCooldownSeconds]);
 
+  /**
+   * 认证动作失败的统一收口：可识别的业务 / 会话拒绝只给用户提示；真故障与未识别变体带上文交给
+   * 错误池。`action` 决定错误池指纹，新增认证动作必须走这里、不要在各自的 catch 里另拼一套。
+   */
+  function presentAuthFailure(
+    error: unknown,
+    fallback: string,
+    action: string,
+  ) {
+    const failure = resolveClientAuthFailure(error, fallback);
+    setLoginStatus(failure.message);
+    if (failure.kind === 'report') {
+      void captureClientError(
+        new ClientActionError(
+          failure.message,
+          { source: 'auth', action },
+          error,
+        ),
+      );
+    }
+  }
+
   async function handleSendCode() {
     if (codeBusy || codeCooldownSeconds > 0) {
       return;
@@ -348,18 +370,7 @@ 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) {
-      // 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,
-          ),
-        );
-      }
+      presentAuthFailure(error, '发送验证码失败', 'send-login-code');
     } finally {
       setCodeBusy(false);
     }
@@ -424,19 +435,7 @@ export function AuthenticatedClient({
       setCode('');
       setPassword('');
     } catch (error) {
-      // 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,
-          ),
-        );
-      }
+      presentAuthFailure(error, '登录失败', 'login');
     } finally {
       setLoginBusy(false);
     }