feat: custom check unReadDynamic

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

lib/pages/search/view.dart

@@ -27,6 +27,7 @@ class _SearchPageState extends State<SearchPage> with RouteAware {
   @override
   void dispose() {
     _searchController.searchFocusNode.dispose();
+    SearchPage.routeObserver.unsubscribe(this);
     super.dispose();
   }