Fix review findings on bulk delete, share editing, selection

- expiry editor commits on blur/Enter with explicit clear button — no more
  per-keystroke PATCHes transiently expiring live links
- shift-range walks the filtered view, anchors reset on clear, updaters
  kept pure (StrictMode-safe)
- bulk delete surfaces errors, 404s on zero deletions, and shares one
  delete+cleanup path with single and album delete (s3::photo_prefix is
  the only prefix source)
- expiry end-of-day convention extracted; share rows update from the
  PATCH response instead of reloading the list
- Gallery container always renders, restoring the simple observer effect

README.md

@@ -5,6 +5,23 @@ share them with clients via private (optionally password-protected) links,
 collect accept/reject votes, ratings and tags, and let clients download
 originals.
 
+## Screenshots
+
+The album view — drag-and-drop upload, justified gallery, and each client's
+feedback (votes, stars, tags) overlaid on the thumbnails:
+
+![Album view with upload zone and feedback overlays](docs/screenshots/album-admin.jpg)
+
+What clients see on a share link — vote on favorites, filter by verdict,
+download selects or the whole album as a ZIP:
+
+![Client gallery with verdict filters](docs/screenshots/share-client.jpg)
+
+The lightbox — accept/reject, star rating, tags, and keyboard-driven culling
+(`P`/`X`/`U`, `1`–`5`):
+
+![Lightbox with voting and rating controls](docs/screenshots/lightbox.jpg)
+
 ## Architecture
 
 ```