feat: Add Xtream API service for IPTV features and precache web artifacts in Dockerfile.

Dockerfile

@@ -8,8 +8,8 @@ WORKDIR /app
 ENV DART_VM_OPTIONS="--old_gen_heap_size=16384"
 ENV FLUTTER_NO_ANALYTICS=1
 
-# Enable web support
-RUN flutter config --enable-web
+# Enable web support and pre-download artifacts
+RUN flutter config --enable-web && flutter precache --web
 
 # Copy dependency files first
 COPY pubspec.yaml ./

lib/features/iptv/services/xtream_service.dart

@@ -291,7 +291,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_series_categories',
         },
-        options: Options(extra: options),
+        options: Options(extra: _cacheOptions.toExtra()),
       );
 
       final List<dynamic> categories = response.data as List<dynamic>;