feat: introduce XtreamService for Xtream API communication, content retrieval, and stream URL generation with caching and proxy support.

lib/features/iptv/screens/playlist_selection_screen.dart

@@ -110,8 +110,7 @@ class PlaylistSelectionScreen extends ConsumerWidget {
             ),
           ),
           // Content
-          SingleChildScrollView(
+          playlistsAsync.when(
-            child: playlistsAsync.when(
             loading: () => const Center(
               child: CircularProgressIndicator(color: AppColors.primary),
             ),
@@ -196,7 +195,8 @@ class PlaylistSelectionScreen extends ConsumerWidget {
                     playlist: playlist,
                     onTap: () {
                       // Update current selected playlist provider first
-                    ref.read(selectedPlaylistProvider.notifier).state = playlist;
+                      ref.read(selectedPlaylistProvider.notifier).state =
+                          playlist;
                       // Then navigate to dashboard
                       context.go('/dashboard');
                     },
@@ -205,7 +205,6 @@ class PlaylistSelectionScreen extends ConsumerWidget {
               );
             },
           ),
-          ),
         ],
       ),
     );