The reason spent a full line of every non-instanceable app's page on a
sentence only someone asking "why not" wants. It now shows a short
"Not available" / "Not enabled" with a hover-and-focus target carrying
the technical detail.
It also says more than it could before. The old text knew about one
blocker — a pinned host port — and its own comment conceded the rest was
"left unexplained rather than guessed at, since the remaining blocker
lives in the compose, which the frontend never sees". It does see it:
apps.json carries each app's service list, so the second rule
instance_create.sh enforces (a service or container name with no <app>
prefix, which cannot be made unique per instance) is reproducible here.
Prometheus now says node-exporter and cadvisor rather than nothing.
And it separates two states that read identically before. An app with no
blocker at all is not "unavailable", it is simply not opted in — a
different sentence with a different fix, and the one Matrix was hitting.
Keyboard reachable via tabindex, with aria-label duplicating the tooltip
since screen readers do not reliably surface a title attribute.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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