fix: 视频播放器封面异常

lib/common/widgets/network_img_layer.dart

@@ -34,6 +34,9 @@ class NetworkImgLayer extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final int defaultImgQuality = GlobalData().imgQuality;
+    if (src == '' || src == null) {
+      return placeholder(context);
+    }
     final String imageUrl =
         '${src!.startsWith('//') ? 'https:${src!}' : src!}@${quality ?? defaultImgQuality}q.webp';
     int? memCacheWidth, memCacheHeight;

lib/pages/video/detail/view.dart

@@ -332,11 +332,13 @@ class _VideoDetailPageState extends State<VideoDetailPage>
       children: [
         GestureDetector(
           onTap: handlePlay,
-          child: Image.network(
-            vdCtr.videoItem['pic'],
+          child: Obx(
+            () => NetworkImgLayer(
+              src: vdCtr.cover.value,
               width: Get.width,
               height: videoHeight,
-            fit: BoxFit.cover, // 适应方式根据需要调整
+              type: 'emote',
+            ),
           ),
         ),
         buildCustomAppBar(),