deploy-disk.sh had its own hardcoded tool check that was out of sync with
check-host-deps.sh, so builds got past the host gate and then failed at
deploy time with "missing host tool mkfs.btrfs" (btrfs-progs was never in
check-host-deps.sh).
- check-host-deps.sh: add mkfs.btrfs/btrfs (btrfs-progs) plus curl/git so
`make deps` / check-host-deps --install covers the entire build + deploy
path in one go.
- deploy-disk.sh: pre-flight now checks the full tool set (sgdisk,
partprobe, mkfs.btrfs, btrfs, rsync, wipefs, truncate, + mkfs.vfat for
efi) and reports ALL missing tools at once with the exact apt install
command, instead of dying on the first one.
- build-live.sh: the live image explicitly installs gdisk, parted,
dosfstools, btrfs-progs, rsync so the graphical installer always has the
deploy tooling regardless of edition.
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