Add: Getting items by its ids

lib/pages/basket.dart

@@ -60,12 +60,12 @@ class _BasketPageState extends State<BasketPage> {
   List<GymItem> cartItems = [];
   double totalPrice = 0;
   List<GymItem> gymCart = [];
+  bool _isLoading = true;
 
   @override
   void initState() {
     super.initState();
     Future.microtask(() => getCart().then((value) async {
-          //TODO: Сделать через получение конкретных товаров через getItemsByIds
           final itemIds =
               value.map((element) => element['id'] as String).toList();
           final items = await getItemsByIds(context, itemIds);
@@ -78,6 +78,7 @@ class _BasketPageState extends State<BasketPage> {
             }).toList();
             totalPrice = cartItems.fold(
                 0, (sum, item) => sum + item.price * item.localCount);
+            _isLoading = false;
           });
         }));
   }
@@ -230,7 +231,7 @@ class _BasketPageState extends State<BasketPage> {
       body: Column(
         children: [
           const GymLinkHeader(title: "Корзина"),
-          gymCart.isEmpty
+          _isLoading
               ? const Expanded(
                   child: Center(child: CircularProgressIndicator()))
               : cartItems.isEmpty