chore: update project dependencies to their latest versions.

lib/core/models/iptv_models.dart

@@ -1,3 +1,4 @@
+import 'dart:convert';
 /// Channel model for Live TV
 class Channel {
   final String streamId;

lib/features/iptv/widgets/channel_card.dart

@@ -1,5 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:cached_network_image/cached_network_image.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../../core/theme/app_colors.dart';
+import '../../../core/theme/app_theme.dart';
+import '../providers/favorites_provider.dart';
 import '../../../core/models/playlist_config.dart';
 import '../../iptv/providers/xtream_provider.dart';