This release branch snapshots the latest dev work onto current main so the
update center can surface recent non-stable Docker tags without operators
looking them up manually. The branch keeps stable Docker discovery as the
primary path while carrying the new recent-tag auto-discovery, UI affordances,
and regression coverage through the repo's release flow.
Constraint: Publication must start from latest origin/main and merge origin/dev on a clean release branch
Constraint: Stable Docker Hub discovery semantics must remain intact while adding recent non-stable discovery
Rejected: Re-open or reuse the already-merged PR #494 branch | it has already been absorbed by main and deleted remotely
Rejected: Publish directly from dev | repo workflow requires a clean release branch to main
Confidence: high
Scope-risk: moderate
Reversibility: clean
Directive: Keep future dev-tag publication work on fresh release branches cut from origin/main; do not revive merged release branches
Tested: Focused update-center vitest suite, npm run typecheck, npm run repo:drift-check, npm run build:web, npm run docs:build, git diff --check (release branch)
Not-tested: Full npm test remains red because tmp/sub2api frontend suites are still broken in this repo snapshot
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