opt multi select

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/fav/pgc/controller.dart

@@ -23,6 +23,9 @@ class FavPgcController
     queryData();
   }
 
+  @override
+  final RxBool allSelected = false.obs;
+
   @override
   void handleSelect({bool checked = false, bool disableSelect = true}) {
     allSelected.value = checked;