Three docker calls ran the binary directly (two plain, one sudo), so in
rootless they hit /var/run/docker.sock (the rooted socket, absent) and
printed 'Cannot connect to the Docker daemon' — the WebUI-image requirement
check, the system-disk WebUI generator (docker system df), and the
app-install fallback (docker ps). Route all three through runFileOp, which in
rootless runs as the docker install user with DOCKER_HOST set and is
argv-safe for --format, and in rooted runs as the manager via the docker
group.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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