feat: adopt material 3 theme and billing adjustments

lib/widgets/home_content.dart

@@ -7,7 +7,7 @@ import '../widgets/native_ad_widget.dart';
 import '../widgets/main_summary_card.dart';
 import '../widgets/subscription_list_widget.dart';
 import '../widgets/empty_state_widget.dart';
-import '../theme/app_colors.dart';
+// import '../theme/app_colors.dart';
 import '../l10n/app_localizations.dart';
 
 class HomeContent extends StatelessWidget {
@@ -35,9 +35,11 @@ class HomeContent extends StatelessWidget {
     final provider = context.watch<SubscriptionProvider>();
 
     if (provider.isLoading) {
-      return const Center(
+      return Center(
         child: CircularProgressIndicator(
-          valueColor: AlwaysStoppedAnimation<Color>(Color(0xFF3B82F6)),
+          valueColor: AlwaysStoppedAnimation<Color>(
+            Theme.of(context).colorScheme.primary,
+          ),
         ),
       );
     }
@@ -65,7 +67,7 @@ class HomeContent extends StatelessWidget {
       onRefresh: () async {
         await provider.refreshSubscriptions();
       },
-      color: const Color(0xFF3B82F6),
+      color: Theme.of(context).colorScheme.primary,
       child: CustomScrollView(
         controller: scrollController,
         physics: const BouncingScrollPhysics(),
@@ -109,7 +111,7 @@ class HomeContent extends StatelessWidget {
                     child: Text(
                       AppLocalizations.of(context).mySubscriptions,
                       style: Theme.of(context).textTheme.titleLarge?.copyWith(
-                            color: AppColors.darkNavy,
+                            color: Theme.of(context).colorScheme.onSurface,
                           ),
                     ),
                   ),
@@ -124,17 +126,17 @@ class HomeContent extends StatelessWidget {
                         Text(
                           AppLocalizations.of(context)
                               .subscriptionCount(provider.subscriptions.length),
-                          style: const TextStyle(
+                          style: TextStyle(
                             fontSize: 14,
                             fontWeight: FontWeight.w600,
-                            color: AppColors.primaryColor,
+                            color: Theme.of(context).colorScheme.primary,
                           ),
                         ),
                         const SizedBox(width: 4),
-                        const Icon(
+                        Icon(
                           Icons.arrow_forward_ios,
                           size: 14,
-                          color: AppColors.primaryColor,
+                          color: Theme.of(context).colorScheme.primary,
                         ),
                       ],
                     ),