refactor: Update Pagination component to ensure hooks are called unconditionally and improve early return logic for better performance and readability.

frontend/src/components/Pagination.jsx

@@ -7,10 +7,10 @@ import { IconChevronLeft, IconChevronRight, IconChevronsLeft, IconChevronsRight
  */
 function Pagination({ currentPage, totalPages, totalItems, pageSize, onPageChange }) {
   const [jumpToPage, setJumpToPage] = useState('');
-  
-  if (totalPages <= 1) return null;
 
+  // Хуки должны вызываться безусловно (до любого return)
   const pages = useMemo(() => {
+    if (totalPages <= 1) return [];
     const result = [];
     let start = Math.max(1, currentPage - 2);
     let end = Math.min(totalPages, currentPage + 2);
@@ -31,6 +31,9 @@ function Pagination({ currentPage, totalPages, totalItems, pageSize, onPageChang
     return result;
   }, [currentPage, totalPages]);
 
+  // Ранний return после всех хуков
+  if (totalPages <= 1) return null;
+
   const startItem = (currentPage - 1) * pageSize + 1;
   const endItem = Math.min(currentPage * pageSize, totalItems);