Add private messaging to the TUI:
- 'm' opens the command bar in message mode; type '<recipient> <text>' and
Enter sends it via the client;
- incoming messages are polled each tick into an inbox;
- 'i' toggles a centered inbox popup listing sent/received messages.
The shared command bar now carries a mode (search vs message) so the prefix,
submit action and shortcut hints follow what is being typed.
michel
05b06ec2ec