NewChatFriendListModel initializes the ChatFriendListModel.

NewChatModel initializes a new ChatModel.

Initialize the main menu model.

NewFriendListModel creates and returns a new friend list model.

Initialize the model.

NewLoginModel initializes the login component.

NewRegisterModel initializes the register component.

ChatFriendListModel manages the friends list within the chat context.

ChatMessage represents a message in the chat.

Main menu model now has ChatModel as a pointer for in-place updates.

FriendListModel represents the model for the friend list page.

Data Messages (used to pass data to child models).

Define a custom message type for received messages.

Action Messages (sent from child models to parent model to request an action).

Result Messages (returned by commands after action execution).