feat(analytics): add custom event tracking to Photos app

Add PhotosEvents helper (8 events) and integrate tracking into:
- Photos store: favorite toggle, delete, filters applied
- Albums store: create, delete, add/remove photos
- Upload page: photo uploaded

Updates ManaScore analytics from 3/5 to 4/5 (customEvents: true).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/shared-utils/src/analytics.ts

@@ -275,6 +275,20 @@ export const ManaCoreEvents = {
 	profileUpdated: () => trackEvent('profile_updated'),
 };
 
+/**
+ * Photos App Events
+ */
+export const PhotosEvents = {
+	photoUploaded: () => trackEvent('photo_uploaded'),
+	photoFavorited: (favorited: boolean) => trackEvent('photo_favorited', { favorited }),
+	photoDeleted: () => trackEvent('photo_deleted'),
+	albumCreated: () => trackEvent('album_created'),
+	albumDeleted: () => trackEvent('album_deleted'),
+	photosAddedToAlbum: (count: number) => trackEvent('photos_added_to_album', { count }),
+	photoRemovedFromAlbum: () => trackEvent('photo_removed_from_album'),
+	filtersApplied: () => trackEvent('filters_applied'),
+};
+
 /**
  * Storage App Events
  */