Frontend update

client/src/components/RequireAuth.jsx

@@ -0,0 +1,20 @@
+import { Navigate, useLocation } from 'react-router-dom'
+import { useAuth } from '../contexts/AuthContext.jsx'
+
+// Gate for /admin/* — redirects to the login screen when not authenticated.
+export default function RequireAuth({ children }) {
+  const { user, loading } = useAuth()
+  const location = useLocation()
+
+  if (loading) {
+    return (
+      <div style={{ minHeight: '100vh', display: 'grid', placeItems: 'center', background: 'var(--bg-deep)' }}>
+        <span className="spin" />
+      </div>
+    )
+  }
+  if (!user) {
+    return <Navigate to="/admin/login" state={{ from: location }} replace />
+  }
+  return children
+}