Two fixes the operator asked for:
- The "what's new" preview was empty. availableChangelog fetched CHANGELOG.md at
ref="0.9.50", but release tags are "v0.9.50" — the raw fetch 404'd and the
panel silently stayed empty. Use the v-prefixed tag as the ref. The existing
test masked it with a wildcard fake; tightened with Http::assertSent.
- The sidebar now shows a "1" badge on the Version item when an update is
available, so an update is visible on every page, not only the Versions page.
Driven by a new ReleaseChecker service: updateAvailable() is a pure cache read
(no network in the sidebar); a scheduled clusev:check-update (every 30 min,
anonymous/read-only) keeps the cache warm so the badge is accurate even before
the operator opens the Versions page.
Refactor: the remote tag lookup (fetch + newest-version) moved out of the
Versions component into ReleaseChecker; the component delegates. nav-item gains
an optional badge prop.
Tests: ReleaseChecker (cache-read update-available, refresh caches, command warms
cache, sidebar badge renders only when available) + the v-prefixed-ref assertion.
371 pass, Pint clean, /versions loads 200 with no console errors; badge + the
"What's new in v0.9.50" panel verified in the browser. Lang parity kept.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>