Update povijest.jsx

Author: Gahjivt

frontend/src/pages/admin/povijest.jsx

@@ -4,6 +4,7 @@ import * as XLSX from "xlsx";
 export default function Povijest() {
   const [transactions, setTransactions] = useState([]);
   const [loading, setLoading] = useState(true);
+  const [, setError] = useState(null);
   const [filter, setFilter] = useState("");
 
   const getSessionDate = (dateObj) => {