✨ WebRTC signaling heartbeat

lib/models/chat.g.dart

@@ -281,6 +281,7 @@ _CallParticipant _$CallParticipantFromJson(Map<String, dynamic> json) =>
               ? null
               : SnAccount.fromJson(json['account'] as Map<String, dynamic>),
       joinedAt: DateTime.parse(json['joined_at'] as String),
+      isLocal: json['is_local'] as bool? ?? false,
     );
 
 Map<String, dynamic> _$CallParticipantToJson(_CallParticipant instance) =>
@@ -290,6 +291,7 @@ Map<String, dynamic> _$CallParticipantToJson(_CallParticipant instance) =>
       'account_id': instance.accountId,
       'account': instance.account?.toJson(),
       'joined_at': instance.joinedAt.toIso8601String(),
+      'is_local': instance.isLocal,
     };
 
 _SnRealtimeCall _$SnRealtimeCallFromJson(Map<String, dynamic> json) =>