docs(mule-image): drop Title field, add bulk Notes editor

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

containers/120-mule-images.md

@@ -80,6 +80,13 @@ For pushes from inside the LXC, gitea creds at `/etc/mule-deploy/git-credentials
 
 ## Changelog
 
+### 2026-05-11 — Drop Title field, add bulk Notes editor
+
+- Removed the `Title` (user_title) row from `PhotoInfoPanel.tsx`: the form field, its `titleDraft`/`setTitleDraft` state, the `commitTitle` handler, and the `photo?.user_title` watcher in the draft-sync `useEffect`. Column stays on `photos` and on the backend model — only the UI affordance went away.
+- New bulk action `set_notes` in `backend/app/routers/photos.py` `bulk_action`: validates the value is a string (or null/empty to clear), then sets `user_notes` on every photo in the selection in one transaction.
+- Frontend wiring: `bulkSetNotes` in `services/api.ts`, `bulkNotes` mutation in `hooks/useBulkPhotoMutations.ts` (optimistic patch with empty-string → null collapse, full rollback on error), surfaced in `RightSidebar.tsx`'s multi-photo bulk panel as a 2-row Textarea + Clear + Apply pair below the Tags section. Doesn't auto-fire on every keystroke — clicking Apply is the explicit commit (otherwise every keystroke would PATCH N rows).
+- Shared `Photo` interface in `types/photo.ts` now includes `user_notes?: string | null` so the optimistic-patch typing accepts the field; previously it only existed on `PhotoInfoPanel`'s local `PhotoDetails` shape.
+
 ### 2026-05-10 — Right sidebar compact rebuild
 
 Right sidebar previously had `<ActiveHeapCard />` + `<Header />` + a scroll region holding two parallel collapsibles ("Edit" + "Metadata"), with three nested `<Section>` sub-collapsibles (Basic Info / Camera / Location) inside Metadata. A lot of chrome for a per-photo form.