Feature request: custom session labels for distinguishing multiple open sessions

When working with multiple Claude Code sessions open simultaneously (e.g., different tasks across different terminal tabs), there's no way to label or identify what each session is focused on.

It would be useful to have a way to set a custom name/label for a session, for example:

• A /name or /label slash command to tag the current session
• A --name CLI flag when starting a session
• Display the label in the status line or prompt

This would make it easier to switch between sessions without having to rely on terminal tab names or reading conversation history to remember what each session is doing.