import 'package:freezed_annotation/freezed_annotation.dart'; import 'user.dart'; import 'message.dart'; part 'chat.freezed.dart'; @freezed class Chat with _$Chat { const factory Chat({ required String id, required String type, required String title, String? avatarUrl, List? participants, @Default(null) Message? lastMessage, DateTime? lastMessageTime, @Default(0) int unreadCount, @Default(false) bool isMuted, @Default(false) bool isPinned, }) = _Chat; }