antes de alterar login

reserva-mesa-dashboard/app/(dashboard)/page.tsx

@@ -21,6 +21,15 @@ export default function DashboardHomePage() {
   const { mesas, loading: loadingMesas } = useMesas();
   const { staff } = useStaff();
 
+  // Guard against missing user data
+  if (!user) {
+    return (
+      <div className="flex items-center justify-center min-h-[60vh]">
+        <div className="text-primary font-display text-2xl animate-pulse">A carregar...</div>
+      </div>
+    );
+  }
+
   // 1. Calculate top stats
   const todayStr = new Date().toISOString().split('T')[0]; 
   const todayReservas = reservas.filter(r => r.data === todayStr || r.estado.startsWith("Confirmada"));