v0.1.18

Fresh-install rehearsal fix: extend the macOS setup Full Disk Access handoff window to one hour, with NUTSHELL_SETUP_PERMISSION_TIMEOUT_MS override, so a real user/VM permission grant is not cut off by the CLI before completion. Also updates the VM rehearsal playbook with Tart UI/auth-seed operating notes.\n\nRelease certification passed for version, packaged CLI/app, Homebrew-style install, and protected-command app handoff checks.