v1.1.8: Fix Android TV navigation with dual-focus system

- Implemented _TVTextField wrapper for playlist fields
- D-pad navigation moves focus without opening keyboard
- 'OK/Select' press opens keyboard for editing
- Fixed missing classes and imports in MobilePlaylistScreen

lib/mobile/features/iptv/widgets/mobile_settings_tab.dart

@@ -108,7 +108,7 @@ class _MobileSettingsTabState extends ConsumerState<MobileSettingsTab> {
                       ),
                       SizedBox(height: 4),
                       Text(
-                        'Version 1.1.7',
+                        'Version 1.1.8',
                         style: TextStyle(
                           fontSize: 13,
                           color: AppColors.textSecondary,