In rootless the container was set to user: <host-uid> (e.g. 1002:1002) with
group_add: <host-sub-gid> (e.g. 166528). Inside the daemon's user namespace
those are out of range — group_add made runc call setgroups() with an unmapped
GID ('setgroups: invalid argument'), so the WebUI container never started.
In rootless the container now runs as 0:0 (userns-root == the install user, which
owns the bind-mounts and the rootless socket) with socket gid 0. Rooted is
unchanged. Verified: libreportal-service comes up and talks to the rootless
socket.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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