diff --git a/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs b/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs
index 416566950..c65cba3ac 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs
@@ -501,7 +501,8 @@ fn auth_route(route: &str) -> AuthRoute {
 ///
 /// 会话路由的 `401/403` 归到权威失效变体，调用方据此清会话；登录路由的 `401` 是用户可修正的
 /// 输入问题。可判定的用户输入原因只进业务变体，认不出的才落到 `UnexpectedRejection`。
-/// 网络、5xx 与契约异常必须保留会话。
+/// `429` 也按路由判定：发码路由是频控，登录路由是「验证码错误次数过多」，两者都是用户可修正的
+/// 输入问题；其余路由的 `429` 仍按未识别拒绝处理。网络、5xx 与契约异常必须保留会话。
 fn map_auth_failure(status: StatusCode, body: &str, route: AuthRoute) -> ClientAuthError {
     crate::platform_maintenance::watch_platform_response(status.as_u16(), body);
     let status_code = status.as_u16();
@@ -526,8 +527,17 @@ fn map_auth_failure(status: StatusCode, body: &str, route: AuthRoute) -> ClientA
             }),
         };
     }
-    if status == StatusCode::TOO_MANY_REQUESTS && route == AuthRoute::SendCode {
-        return ClientAuthError::SmsCodeThrottled;
+    if status == StatusCode::TOO_MANY_REQUESTS {
+        return match route {
+            AuthRoute::SendCode => ClientAuthError::SmsCodeThrottled,
+            AuthRoute::PhoneLogin => {
+                ClientAuthError::PhoneCodeLoginRejected(PhoneCodeLoginRejected { server_message })
+            }
+            _ => ClientAuthError::UnexpectedRejection(UnexpectedRejection {
+                status: status_code,
+                server_message,
+            }),
+        };
     }
     if status == StatusCode::BAD_REQUEST {
         return match route {
@@ -1350,6 +1360,33 @@ mod tests {
         );
         assert_eq!(throttled, ClientAuthError::SmsCodeThrottled);
 
+        // 登录路由的 429 是「验证码错误次数过多」：用户可修正的输入问题，不能进系统变体被上报。
+        let verify_attempts_exceeded = map_auth_failure(
+            StatusCode::TOO_MANY_REQUESTS,
+            r#"{"error":{"message":"验证码错误次数过多，请重新获取验证码"}}"#,
+            AuthRoute::PhoneLogin,
+        );
+        assert_eq!(
+            verify_attempts_exceeded,
+            ClientAuthError::PhoneCodeLoginRejected(PhoneCodeLoginRejected {
+                server_message: Some("验证码错误次数过多，请重新获取验证码".to_string()),
+            })
+        );
+
+        // 其余路由的 429 仍未识别拒绝：既不冒充业务原因，也不冒充发码频控。
+        let unknown_throttle = map_auth_failure(
+            StatusCode::TOO_MANY_REQUESTS,
+            r#"{"error":{"message":"限流"}}"#,
+            AuthRoute::Other,
+        );
+        assert_eq!(
+            unknown_throttle,
+            ClientAuthError::UnexpectedRejection(UnexpectedRejection {
+                status: 429,
+                server_message: Some("限流".to_string()),
+            })
+        );
+
         let bad_code = map_auth_failure(
             StatusCode::UNAUTHORIZED,
             r#"{"error":{"message":"验证码错误"}}"#,