diff --git a/web/src/pages/LoginPage.tsx b/web/src/pages/LoginPage.tsx
index 1ad4a6b..c4c9939 100644
--- a/web/src/pages/LoginPage.tsx
+++ b/web/src/pages/LoginPage.tsx
@@ -13,6 +13,16 @@ export function LoginPage() {
   const { status, loading: statusLoading, refresh: refreshStatus } = useLoginStatus();
   const { token } = useAuth();
   const { toast } = useToast();
+
+  // Auto-check cookie on mount (lightweight, no browser opened)
+  useEffect(() => {
+    if (!token) return;
+    void checkLoginCookie().then((res) => {
+      if (res.success && res.data?.hasCookies) {
+        void refreshStatus(); // Only open browser if cookies exist
+      }
+    }).catch(() => {});
+  }, [token, refreshStatus]);
   const navigate = useNavigate();
 
   const [qrData, setQrData] = useState<string | null>(null);