One-time banner shown at the top of the admin layout to surface the org
rename + GHCR registry change for operators who haven't read the release
notes. Sits right below the existing maintenance banner — same pattern.
## What it looks like
Blue, dismissible banner with a short body:
> PicPeak's image registry has moved
> Update your docker-compose.yml to pull from
> ghcr.io/picpeak/picpeak/{backend,frontend} — the old path is no longer
> being updated. [See migration notes]
The link goes to `docs/migration-to-org.md` on the new org repo.
## Design choices
- **No backend feature flag.** A hard-coded `MIGRATION_BANNER_ENABLED`
constant in the component file (1 line) gates global display. After
~1 quarter, flip it to false (or drop the mount in `AdminLayout.tsx`)
in a small follow-up PR. A backend `app_settings` row + Settings UI
toggle would be overkill for a one-time migration event.
- **Per-admin dismissal via localStorage.** Key is `picpeak:migration-banner:v1`
(versioned so a future "we've moved AGAIN" banner can show without
inheriting earlier dismissal). Wrapped in try/catch so private-mode
browsers + storage-quota-exceeded errors don't crash the layout.
- **EN + DE strings** under a new top-level `migrationBanner` namespace.
Other locales (fr, nl, pt, ru) fall through to EN — `migrationBanner.*`
keys aren't translated there yet, deliberate (per #669 the ops
banner is operator-facing and admins reading EN/DE is the majority).
- **Reuses `common.dismiss`** for the close-button aria-label.
## Test plan
- [ ] Frontend `npm run build:check` passes (TS + build)
- [ ] Open admin dashboard in EN → banner shows at top, below header,
above main content
- [ ] Switch to DE → banner shows German strings
- [ ] Click dismiss → banner hides, doesn't re-appear on hard refresh
- [ ] Clear localStorage `picpeak:migration-banner:v1` → banner returns
- [ ] Flip `MIGRATION_BANNER_ENABLED` to false → banner doesn't render
for anyone, regardless of dismissal state
Refs #669.
Paul Nothaft
2a4bf3b868