pref: add const to tag list

lib/views/hashtag/hashtag.dart

@@ -60,13 +60,12 @@ class _HashtagState extends State<Hashtag> {
               final item = state.items[index];
               final type = item.type;
               switch (type) {
-                //TODO:Must add tags
                 case 'infography':
                   return InfographyItem(
                     image: item.image,
                     category: item.category!,
                     title: item.title,
-                    tag: [],
+                    tag: const [],
                     onMarkChanged: (_, value, __) =>
                         _changeMark(item.id, value, type),
                     createdAt: item.createdAt,