feat: Albums view, auto albums, EXIF details, download, bulk select

Albums tab with manual album CRUD (create/delete, cover photo grid)
and Smart Albums auto-generated by year, city, and camera model using
SQLite window functions — no extra storage, computed from existing data.

Lightbox gets a download-original button (streams raw file with
Content-Disposition: attachment).

DetailPanel Camera section expands to show ISO, aperture, shutter speed,
focal length, and lens model extracted at ingest time; five new DB columns
added via safe ALTER TABLE migration.

Bulk selection: hover a photo to reveal a circle checkbox; selecting
any photo activates a floating action bar for star/unstar and add-to-album
across the whole selection. PhotoCard wrapped in React.memo to limit
re-renders to only affected cards.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/src/api/photos.js

@@ -130,6 +130,28 @@ export function fetchMemories() {
   return api(`/api/memories/today?date=${date}`);
 }
 
+// Albums
+export function fetchAlbums() {
+  return api('/api/albums');
+}
+
+export function renameCollection(id, name) {
+  return api(`/api/collections/${id}`, { method: 'PATCH', ...json({ name }) });
+}
+
+export function deleteCollection(id) {
+  return api(`/api/collections/${id}`, { method: 'DELETE' });
+}
+
+// Bulk operations
+export function bulkStar(ids, starred) {
+  return api('/api/photos/bulk', { method: 'PATCH', ...json({ ids, starred }) });
+}
+
+export function bulkAddToCollection(ids, collectionId) {
+  return api('/api/photos/bulk/collections', { method: 'POST', ...json({ ids, collectionId }) });
+}
+
 // Duplicates
 export function fetchDuplicates() {
   return api('/api/duplicates');