TF-3385 Update mailbox name

lib/features/mailbox/presentation/model/mailbox_tree.dart

@@ -3,6 +3,7 @@ import 'dart:collection';
 
 import 'package:collection/collection.dart';
 import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/jmap/core/unsigned_int.dart';
 import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
 import 'package:model/mailbox/expand_mode.dart';
 import 'package:model/mailbox/presentation_mailbox.dart';
@@ -83,6 +84,27 @@ class MailboxTree with EquatableMixin {
     }
   }
 
+  bool updateMailboxNameById(MailboxId mailboxId, MailboxName mailboxName) {
+    final matchedNode = findNode((node) => node.item.id == mailboxId);
+    if (matchedNode != null) {
+      matchedNode.item = matchedNode.item.copyWith(name: mailboxName);
+      return true;
+    }
+    return false;
+  }
+
+  void updateMailboxUnreadCountById(MailboxId mailboxId, int unreadCount) {
+    final matchedNode = findNode((node) => node.item.id == mailboxId);
+    if (matchedNode != null) {
+      final currentUnreadCount = matchedNode.item.unreadEmails?.value.value ?? 0;
+      final updatedUnreadCount = currentUnreadCount + unreadCount;
+      if (updatedUnreadCount < 0) return;
+      matchedNode.item = matchedNode.item.copyWith(
+        unreadEmails: UnreadEmails(UnsignedInt(updatedUnreadCount)),
+      );
+    }
+  }
+
   String? getNodePath(MailboxId mailboxId) {
     final matchedNode = findNode((node) => node.item.id == mailboxId);
     if (matchedNode == null) {