TF-1362: [Presentation] : Implement StoreLastTimeDismissed and show detail for spam report banner

lib/features/mailbox_dashboard/domain/model/unread_spam_emails_response.dart

@@ -1,13 +1,14 @@
 
 import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
 
 class UnreadSpamEmailsResponse with EquatableMixin {
-  final int? unreadSpamEmailNumber;
+  final Mailbox? unreadSpamMailbox;
 
   UnreadSpamEmailsResponse({
-    this.unreadSpamEmailNumber,
+    this.unreadSpamMailbox,
   });
 
   @override
-  List<Object?> get props => [unreadSpamEmailNumber];
+  List<Object?> get props => [unreadSpamMailbox];
 }