TF-3767 Use TupleKey to save recent search for each account

Signed-off-by: dab246 <tdvu@linagora.com>

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

@@ -1,5 +1,9 @@
 
 import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/core/user_name.dart';
+import 'package:model/extensions/account_id_extensions.dart';
+import 'package:tmail_ui_user/features/caching/utils/cache_utils.dart';
 
 class RecentSearch with EquatableMixin {
   final String value;
@@ -11,6 +15,10 @@ class RecentSearch with EquatableMixin {
     return RecentSearch(word, DateTime.now());
   }
 
+  String generateTupleKey(AccountId accountId, UserName userName) {
+    return TupleKey(value, accountId.asString, userName.value).encodeKey;
+  }
+
   @override
   List<Object?> get props => [value, creationDate];
 }