feat: cleaning code

lib/feature/shop/presentation/screen/shop_screen.dart

@@ -198,7 +198,7 @@ class _CoinsTab extends StatelessWidget {
       children: [
         _ItemCard(
           title: 'سکه رایگان',
-          glowColor: const Color(0xFF1B5E20),
+          glowColor: AppColors.successDark,
           icon: Icons.card_giftcard,
           subtitle: 'با دیدن تبلیغ',
           action: _PriceButton(
@@ -210,7 +210,7 @@ class _CoinsTab extends StatelessWidget {
         for (final p in packages)
           _ItemCard(
             title: p.title,
-            glowColor: const Color(0xFF1B5E20),
+            glowColor: AppColors.successDark,
             icon: Icons.savings,
             ribbon: p.bonusPct > 0 ? '+${p.bonusPct}٪' : null,
             subtitle:
@@ -402,7 +402,7 @@ class _ItemCard extends StatelessWidget {
         gradient: const LinearGradient(
           begin: Alignment.topCenter,
           end: Alignment.bottomCenter,
-          colors: [Color(0xFF6E1322), Color(0xFF3A0A12)],
+          colors: [Color(0xFF6E1322), AppColors.bg],
         ),
         borderRadius: BorderRadius.circular(14),
         border: Border.all(color: AppColors.gold, width: 1.6),
@@ -447,7 +447,7 @@ class _ItemCard extends StatelessWidget {
             angle: -0.7,
             child: Container(
               padding: const EdgeInsets.symmetric(horizontal: 26, vertical: 3),
-              color: const Color(0xFF2E7D32),
+              color: AppColors.green,
               child: Text(
                 ribbon!,
                 style: const TextStyle(
@@ -571,7 +571,7 @@ class _PriceButton extends StatelessWidget {
         disabled
             ? const [Color(0xFF555555), Color(0xFF333333)]
             : green
-            ? const [Color(0xFF3FA34D), Color(0xFF1B5E20)]
+            ? const [AppColors.success, AppColors.successDark]
             : const [Color(0xFFD83A4A), Color(0xFF8E0E1B)];
     return Opacity(
       opacity: disabled ? 0.85 : 1,

lib/feature/shop/presentation/screen/vip_screen.dart

@@ -159,7 +159,7 @@ class _VipPackageTile extends StatelessWidget {
         gradient: const LinearGradient(
           begin: Alignment.topCenter,
           end: Alignment.bottomCenter,
-          colors: [Color(0xFF6E1322), Color(0xFF3A0A12)],
+          colors: [Color(0xFF6E1322), AppColors.bg],
         ),
         borderRadius: BorderRadius.circular(14),
         border: Border.all(color: AppColors.gold, width: 1.4),