v1.1.9: Fix input activation not showing keyboard on Android TV

- Added SystemChannels.textInput.invokeMethod('TextInput.show') to force keyboard
- Used addPostFrameCallback to ensure widget state is updated before focus request
- Added support for gameButtonA and numpadEnter keys

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

@@ -108,7 +108,7 @@ class _MobileSettingsTabState extends ConsumerState<MobileSettingsTab> {
                       ),
                       SizedBox(height: 4),
                       Text(
-                        'Version 1.1.8',
+                        'Version 1.1.9',
                         style: TextStyle(
                           fontSize: 13,
                           color: AppColors.textSecondary,