feat: refactor code

lib/feature/shop/domain/entities/shop_entities.dart

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+/// موجودیت‌های کاتالوگ فروشگاه (مستقل از JSON).
+class CoinPackage {
+  final String id;
+  final String title;
+  final int coins;
+  final int vipDays;
+  final int priceToman;
+  final int bonusPct;
+  const CoinPackage({
+    required this.id,
+    required this.title,
+    required this.coins,
+    required this.vipDays,
+    required this.priceToman,
+    required this.bonusPct,
+  });
+}
+
+class TicketPackage {
+  final String id;
+  final String title;
+  final int tickets;
+  final int priceToman;
+  const TicketPackage({
+    required this.id,
+    required this.title,
+    required this.tickets,
+    required this.priceToman,
+  });
+}
+
+class CardSkin {
+  final String id;
+  final String title;
+  final int priceCoins;
+  const CardSkin(
+      {required this.id, required this.title, required this.priceCoins});
+}
+
+class Booster {
+  final String id;
+  final String title;
+  final int multiplier;
+  final int hours;
+  final int priceToman;
+  const Booster({
+    required this.id,
+    required this.title,
+    required this.multiplier,
+    required this.hours,
+    required this.priceToman,
+  });
+}
+
+class VipPackage {
+  final String id;
+  final String title;
+  final int months;
+  final int priceToman;
+  const VipPackage({
+    required this.id,
+    required this.title,
+    required this.months,
+    required this.priceToman,
+  });
+}
+
+/// کلِ داده‌ی فروشگاه: کاتالوگ + کارت‌های متعلق به کاربر + کارت انتخابی.
+class ShopData {
+  final List<CoinPackage> coinPackages;
+  final List<TicketPackage> ticketPackages;
+  final List<CardSkin> cardSkins;
+  final List<Booster> boosters;
+  final List<VipPackage> vipPackages;
+  final List<String> ownedCards;
+  final String selectedCard;
+
+  const ShopData({
+    required this.coinPackages,
+    required this.ticketPackages,
+    required this.cardSkins,
+    required this.boosters,
+    required this.vipPackages,
+    required this.ownedCards,
+    required this.selectedCard,
+  });
+
+  bool owns(String cardId) => cardId == 'simple' || ownedCards.contains(cardId);
+}

lib/feature/shop/domain/repository/shop_repository.dart

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+import '../../../../core/resources/data_state.dart';
+import '../../../../core/usecase/use_case.dart';
+import '../entities/shop_entities.dart';
+
+abstract class ShopRepository {
+  Future<DataState<ShopData>> getShop();
+  Future<DataState<String>> buyCard(String cardId);
+  Future<DataState<String>> selectCard(String cardId);
+  Future<DataState<String>> purchase(PurchaseParams params);
+  Future<DataState<int>> adReward(String token);
+}

lib/feature/shop/domain/use_cases/ad_reward_usecase.dart

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+import '../../../../core/resources/data_state.dart';
+import '../../../../core/usecase/use_case.dart';
+import '../repository/shop_repository.dart';
+
+class AdRewardUseCase implements UseCase<DataState<int>, String> {
+  final ShopRepository repository;
+  AdRewardUseCase(this.repository);
+
+  @override
+  Future<DataState<int>> call(String params) => repository.adReward(params);
+}

lib/feature/shop/domain/use_cases/buy_card_usecase.dart

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+import '../../../../core/resources/data_state.dart';
+import '../../../../core/usecase/use_case.dart';
+import '../repository/shop_repository.dart';
+
+class BuyCardUseCase implements UseCase<DataState<String>, String> {
+  final ShopRepository repository;
+  BuyCardUseCase(this.repository);
+
+  @override
+  Future<DataState<String>> call(String params) => repository.buyCard(params);
+}

lib/feature/shop/domain/use_cases/get_shop_usecase.dart

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+import '../../../../core/resources/data_state.dart';
+import '../../../../core/usecase/use_case.dart';
+import '../entities/shop_entities.dart';
+import '../repository/shop_repository.dart';
+
+class GetShopUseCase implements UseCase<DataState<ShopData>, NoParams> {
+  final ShopRepository repository;
+  GetShopUseCase(this.repository);
+
+  @override
+  Future<DataState<ShopData>> call(NoParams params) => repository.getShop();
+}

lib/feature/shop/domain/use_cases/purchase_usecase.dart

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+import '../../../../core/resources/data_state.dart';
+import '../../../../core/usecase/use_case.dart';
+import '../repository/shop_repository.dart';
+
+class PurchaseUseCase implements UseCase<DataState<String>, PurchaseParams> {
+  final ShopRepository repository;
+  PurchaseUseCase(this.repository);
+
+  @override
+  Future<DataState<String>> call(PurchaseParams params) =>
+      repository.purchase(params);
+}

lib/feature/shop/domain/use_cases/select_card_usecase.dart

@@ -0,0 +1,12 @@
+import '../../../../core/resources/data_state.dart';
+import '../../../../core/usecase/use_case.dart';
+import '../repository/shop_repository.dart';
+
+class SelectCardUseCase implements UseCase<DataState<String>, String> {
+  final ShopRepository repository;
+  SelectCardUseCase(this.repository);
+
+  @override
+  Future<DataState<String>> call(String params) =>
+      repository.selectCard(params);
+}