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

components/guest-guard.tsx

@@ -1,23 +1,20 @@
 'use client';
 
 import { useEffect, useState } from 'react';
-import { useSearchParams } from 'next/navigation';
 import { authApi } from '@/lib/api';
 
 type Status = 'checking' | { kind: 'ok'; guestName: string } | 'denied';
 
 export default function GuestGuard({ children }: { children: React.ReactNode }) {
-  const params = useSearchParams();
   const [status, setStatus] = useState<Status>('checking');
 
   useEffect(() => {
     let cancelled = false;
     (async () => {
-      const usr = params.get('usr');
+      const usr = new URL(window.location.href).searchParams.get('usr');
       try {
         if (usr) {
           await authApi.session({ usr });
-          // user said leaving the token in URL is fine — do NOT strip
         }
         const who = await authApi.whoami();
         if (cancelled) return;
@@ -31,7 +28,7 @@ export default function GuestGuard({ children }: { children: React.ReactNode })
       }
     })();
     return () => { cancelled = true; };
-  }, [params]);
+  }, []);
 
   if (status === 'checking') return <div className="min-h-screen flex items-center justify-center text-gray-500">Verificando convite…</div>;
   if (status === 'denied') return <div className="min-h-screen flex items-center justify-center text-center px-6">