Fixed 'use client' usage.

src/app/login/LoginPage.tsx

@@ -0,0 +1,17 @@
+'use client';
+import LoginForm from './LoginForm';
+import styles from './LoginPage.module.css';
+
+export function LoginPage() {
+  if (process.env.loginDisabled) {
+    return null;
+  }
+
+  return (
+    <div className={styles.page}>
+      <LoginForm />
+    </div>
+  );
+}
+
+export default LoginPage;