Store refresh token on login

front/src/pages/auth/Callback.tsx

@@ -0,0 +1,17 @@
+import { useEffect } from 'react';
+import { useSearchParams, useNavigate } from 'react-router-dom';
+
+function Callback() {
+  const [searchParams] = useSearchParams();
+  const refreshToken = searchParams.get('refreshToken');
+  localStorage.setItem('refreshToken', refreshToken || '');
+
+  const navigate = useNavigate();
+  useEffect(() => {
+    navigate('/');
+  }, [navigate]);
+
+  return <></>;
+}
+
+export default Callback;