ปรับ frontend

frontend/app/_auth/useAuthGuard.jsx

@@ -0,0 +1,23 @@
+//File: frontend/app/_auth/useAuthGuard.jsx
+'use client';
+import { useEffect, useState } from 'react';
+import { usePathname, useRouter } from 'next/navigation';
+import Auth from './AuthDriver';
+
+export default function UseAuthGuard({ children }) {
+  const [ok, setOk] = useState(false);
+  const router = useRouter();
+  const pathname = usePathname();
+
+  useEffect(() => {
+    let alive = true;
+    (async () => {
+      const me = await Auth.me().catch(() => ({ ok: false }));
+      if (alive && me?.ok) setOk(true);
+      else if (alive) router.replace(`/login?next=${encodeURIComponent(pathname || '/')}`);
+    })();
+    return () => { alive = false; };
+  }, [pathname, router]);
+
+  return ok ? <>{children}</> : null;
+}