fix(build): read URL params via window in guards (avoid useSearchParams prerender error)

components/admin-guard.tsx

@@ -1,22 +1,19 @@
 'use client';
 
 import { useEffect, useState } from 'react';
-import { useSearchParams } from 'next/navigation';
 import { authApi } from '@/lib/api';
 
 export default function AdminGuard({ children }: { children: React.ReactNode }) {
-  const params = useSearchParams();
   const [state, setState] = useState<'checking' | 'ok' | 'denied'>('checking');
 
   useEffect(() => {
     let cancelled = false;
     (async () => {
-      const adm = params.get('adm');
+      const url = new URL(window.location.href);
+      const adm = url.searchParams.get('adm');
       try {
         if (adm) {
           await authApi.session({ adm });
-          // strip the param from URL but keep route
-          const url = new URL(window.location.href);
           url.searchParams.delete('adm');
           window.history.replaceState({}, '', url.toString());
         }
@@ -29,7 +26,7 @@ export default function AdminGuard({ children }: { children: React.ReactNode })
       }
     })();
     return () => { cancelled = true; };
-  }, [params]);
+  }, []);
 
   if (state === 'checking') return <div className="min-h-screen flex items-center justify-center text-gray-500">Verificando…</div>;
   if (state === 'denied') return <div className="min-h-screen flex items-center justify-center text-center px-6">