The digest compare only ever asks about the tag already pinned, so it
answers "has my tag been rebuilt?" and can never answer "does a newer
version exist?". An app on v0.16 reports up to date forever while 0.17
ships. That is the gap between an app that updates and an app that is
current, and it silently affects every pinned app.
Adds tag enumeration for VERSIONED tags only (rolling tags already move
on their own): list the repo's tags, keep those sharing the current tag's
SHAPE, and pick the numerically greatest.
Shape matching is the whole safety story — v0.16 -> v#.# so it can never
"upgrade" you onto v0.16-alpine, 31-fpm-alpine onto 31-apache, or a date
tag onto a semver one. Comparison is component-wise numeric, so 0.10 > 0.9
and 1.0 > 0.99 (a string sort gets both wrong), with 10# forcing base ten
so an upstream "08" cannot be read as octal. 15 unit tests cover it.
Docker Hub only, deliberately: all three pinned apps live there, it needs
no auth, and the generic OCI tags/list wants a per-registry token dance.
Other registries stay quiet rather than guess. Throttled inside the
existing registry window and cached between windows so it cannot flicker.
Surfaced as INFORMATION, never an action: no button applies it, because a
version move can carry a data migration. `update_available` and the "up
to date" badge keep their exact meaning; the new state sits beside them
and points at the Version field.
Against the live registry: stalwart v0.16 is current, nextcloud is on
31-fpm-alpine with 34-fpm-alpine out, mastodon on v4.2.0 with v4.6.5 out.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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