feat: add payment

lib/feature/shop/data/model/shop_models.dart

@@ -9,6 +9,7 @@ class ShopMapper {
         vipDays: (j['vip_days'] ?? 0) as int,
         priceToman: (j['price_toman'] ?? 0) as int,
         bonusPct: (j['bonus_pct'] ?? 0) as int,
+        sku: (j['sku'] ?? '') as String,
       );
 
   static TicketPackage ticket(Map<String, dynamic> j) => TicketPackage(
@@ -16,6 +17,7 @@ class ShopMapper {
         title: j['title'] as String,
         tickets: (j['tickets'] ?? 0) as int,
         priceToman: (j['price_toman'] ?? 0) as int,
+        sku: (j['sku'] ?? '') as String,
       );
 
   static CardSkin card(Map<String, dynamic> j) => CardSkin(
@@ -30,6 +32,7 @@ class ShopMapper {
         multiplier: (j['multiplier'] ?? 1) as int,
         hours: (j['hours'] ?? 0) as int,
         priceToman: (j['price_toman'] ?? 0) as int,
+        sku: (j['sku'] ?? '') as String,
       );
 
   static VipPackage vip(Map<String, dynamic> j) => VipPackage(
@@ -37,6 +40,7 @@ class ShopMapper {
         title: j['title'] as String,
         months: (j['months'] ?? 1) as int,
         priceToman: (j['price_toman'] ?? 0) as int,
+        sku: (j['sku'] ?? '') as String,
       );
 
   static ShopData shopData(Map<String, dynamic> j) {