完成前端改造

1、下一步实现各个分类下载视频中重复视频去除-可配置是否去重

utils/SystemStaticUtil.cs

@@ -0,0 +1,9 @@
+namespace dy.net.utils
+{
+    public class SystemStaticUtil
+    {
+        public static string DOWN_IMAGE_VIDEO_ENABLE="DOWN_IMGVIDEO";
+
+        public static string ASPNETCORE_URLS = "ASPNETCORE_URLS";
+    }
+}