migrate site id to varchar instead of int

components/Header.tsx

@@ -119,7 +119,7 @@ const Header: React.FC<HeaderProps> = ({
             <i className="fa-solid fa-map-marker-alt text-gray-500" />
             <select
               value={selectedSiteId ?? ''}
-              onChange={(e) => setSelectedSiteId(e.target.value ? Number(e.target.value) : null)}
+              onChange={(e) => setSelectedSiteId(e.target.value ? e.target.value : null)}
               className="px-3 py-1.5 border border-gray-300 rounded-md shadow-sm focus:ring-red-500 focus:border-red-500 bg-white text-sm text-gray-900"
             >
               {visibleSites.length === 0 && <option value="">Tidak ada site</option>}