Before: startup script wrote AGNES_VERSION=stable (the floating tag name)
into .env, which overrode the image's build-time ENV AGNES_VERSION=2026.04.47.
UI badge showed 'stable-stable' instead of 'stable-2026.04.47'.
After:
- Dockerfile ARG/ENV for AGNES_COMMIT_SHA (alongside existing VERSION + CHANNEL)
- release.yml passes github.sha as AGNES_COMMIT_SHA build-arg
- Startup script no longer writes these three into .env; the app reads them
from the image ENV set at build time.
Result: badge displays 'stable-2026.04.47 · stable · <time> ago' with the
real CalVer, and the commit SHA tooltip points at an actual commit rather
than the floating manifest digest.
af6761f33e