TODO:

• scrolling chat history; (somewhat works out of box); +
• log errors to file; +
• give serial id to each msg in chat to track it; (use slice index) +
• show msg id next to the msg; +
• regen last message; +
• delete last message; +
• edit message? (including from bot);
• use chatml template (but do not show it to the user);
• ability to copy message;
• aility to copy selected text;
• menu with old chats (chat files); +