TF-105 Handle event click link and loading content of HtmlContentViewer

lib/features/email/presentation/model/web_view_state.dart

@@ -0,0 +1,9 @@
+
+import 'package:core/core.dart';
+
+class WebViewLoadingState extends UIState {
+  WebViewLoadingState();
+
+  @override
+  List<Object?> get props => [];
+}