Live-ISO bos-rescue finds the installed btrfs @ and ESP, then offers
arch-chroot and/or the same GRUB NVRAM + --removable sequence as
post-install.sh. Recovery is grub-btrfs or this reinstall — GRUB pins
rootflags=subvol=@.
bos-first-boot runs once after the first graphical login: NVIDIA offer
file + notify (no driver install), VM-without-GL notify, HiDPI hint
file (never rewrites monitors.json).
Re-enable the Calamares packages module as a refresh-only step with
skip_if_no_internet and ignore_update_db_error so offline installs
cannot abort on pacman -Sy.
744f18cd90