ref |> 直播间视频消息添加灰色蒙层，与安卓保持一致

@@ -127,6 +127,15 @@ export struct TabLiveItemComponent {
               .objectFit(ImageFit.Cover)
               .borderRadius(4)
               .id('iv_id')
+            Row()
+              .backgroundColor('#30000000')
+              .borderRadius(4)
+              .alignRules({
+                left: { anchor: "iv_id", align: HorizontalAlign.Start },
+                right: { anchor: "iv_id", align: HorizontalAlign.End },
+                top: { anchor: "iv_id", align: VerticalAlign.Top },
+                bottom: { anchor: "iv_id", align: VerticalAlign.Bottom }
+              })
             Stack() {
               Row()
                 .borderRadius(90)