Auto-lock functionality on idle or system lock

Hi,

I’m a big fan of Tabby and I’d like to suggest a new security-focused feature: Auto-lock.

It would be very helpful if Tabby could automatically lock itself and require the Master Password to resume access under the following conditions:

Idle Timeout: Automatically lock after a user-defined period of inactivity (e.g., 10 minutes).
System Events: Automatically lock when the Operating System session is locked or when the system enters sleep/hibernate mode.

This would significantly improve security, especially for those of us who leave sensitive terminal sessions open throughout the day.

Thank you for your hard work on this project!