dispose method
销毁视频实例并清理状态
Implementation
Future<void> dispose() async {
if (_videoId != null && _videoId!.isNotEmpty) {
try {
await PangrowthContent.destroyGridVideo(_videoId!);
} catch (error) {
debugPrint('GridVideoController: destroy failed -> $error');
}
}
_videoId = null;
}