ReadEnvGroups returned (nil, nil) when .env.example wasn't found, and that
nil slice marshaled to JSON null instead of []. The admin UI's env editor
unconditionally calls .reduce()/.map() on the response, so it crashed on
load with "Cannot read properties of null" -- and .env.example was never
copied into the container image in the first place, so this was always the
production code path, not an edge case.
Fixed the nil-slice response and added .env.example to the image so the
editor actually has a template of available settings to show. The real
current values still require the deploy host to mount its actual .env file
into the owpengram-admin container at /app/.env (procctl.Manager.Root is
just os.Getwd(), i.e. the container's /app workdir) -- that's a systemd
Quadlet unit change on the deploy host, not something this commit can fix on
its own.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
