connect method

@override Future<void> connect()

Opens the real-time connection (WebSocket/SSE/polling) honoring ChatConfig.realtimeMode.

Call once after successful authentication. Re-entrant: calling connect while already connected is a cheap no-op; calling it after a disconnect re-opens the channel.

Implementation

@override
Future<void> connect() async {
  _connectionState = ChatConnectionState.connected;
  _stateController.add(_connectionState);
  _eventController.add(const ChatEvent.connected());
}