v1.49.0

Added

• Persistent sessions (tmux) — sessions now run inside a tmux session, so your agents keep running after you quit Clave, survive crashes, and reattach automatically on the next launch. They're also reachable from any terminal with tmux -L clave attach. On by default when tmux is installed (sessions fall back to normal otherwise); you can turn it off in Settings → Sessions.

Thanks to @Ruslan660 for the original implementation (#20).