fix: update RequireAuth component to accept ReactNode as children type

frontend/src/components/RequireAuth.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 import { Navigate, useLocation } from 'react-router-dom';
 import { useAuth } from '../context/AuthContext';
 
-const RequireAuth: React.FC<{ children: JSX.Element }> = ({ children }) => {
+const RequireAuth: React.FC<{ children: React.ReactNode }> = ({ children }) => {
   const { isAuthenticated, isLoading } = useAuth();
   const location = useLocation();