refactor(login): drop ineffective guard around auto-login loading reset

The finally block read autoLoginSuccess from the mount-time closure, so the condition was always true and the guard never did anything. The splash stays visible through the autoLoginSuccess flag.

src/pages/LoginPage.tsx

@@ -141,9 +141,8 @@ export function LoginPage() {
           setRememberPassword(storedRememberPassword || Boolean(storedKey));
         }
       } finally {
-        if (!autoLoginSuccess) {
-          setAutoLoading(false);
-        }
+        // 自动登录成功时 showSplash 仍由 autoLoginSuccess 维持，可无条件结束 loading
+        setAutoLoading(false);
       }
     };