Came up debugging the in-app update flow — wasn't obvious which image
the container was actually running without exec'ing in. New flow:
### Server
- internal/server/version.go: new `var ServerVersion = "dev"`,
overridden via -ldflags at build time.
- /healthz response gains a "version" key alongside the existing
"status" + "min_client_version". Backward-compat: existing clients
ignore unknown JSON fields. Endpoint stays unauthenticated.
### Build
- Dockerfile: new `ARG MINSTREL_VERSION=dev`, threaded into the
go build -ldflags so the binary's ServerVersion is stamped at
link time. Default "dev" preserves local `docker build` ergonomics.
- .forgejo/workflows/release.yml: tags step also emits a `version`
output (the git tag for tag pushes, "main" for branch pushes);
build step passes it as `--build-arg MINSTREL_VERSION=...`.
### Web
- web/src/lib/components/ServerVersion.svelte: small understated
text ("Server v2026.05.10.2") that fetches /healthz on mount.
Renders nothing on parse failure or pre-version images.
- Mounted at the bottom of Settings.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Lets the M7 Flutter client refuse to operate against an incompatible
server (e.g., new endpoints the client depends on, breaking schema
shifts). The version constant is bumped on each release where the
client/server contract changes; old clients show the user a blocking
"update required" modal pointed at the latest APK / TestFlight build.
bvandeusen