MessageListHeader
open fun MessageListHeader(modifier: Modifier, channel: Channel, currentUser: User?, connectionState: ConnectionState, typingUsers: List<User>, messageMode: MessageMode, onBackPressed: () -> Unit, onHeaderTitleClick: (Channel) -> Unit, onChannelAvatarClick: () -> Unit?)
The default header of the message list. Usually a back button as a leading content, the channel title in the top center, the channel information or the connection status in the bottom center, and the channel avatar as the trailing content.