feat(mobile): UI-03 photos and share pages (17-20)

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

apps/mobile/lib/l10n/app_en.arb

@@ -283,7 +283,7 @@
   "photoHide": "Hide",
   "photoUnhide": "Unhide",
   "photoDeleteConfirmTitle": "Delete this photo?",
-  "photoDeleteConfirmBody": "The cloud photo will be deleted. This cannot be undone.",
+  "photoDeleteConfirmBody": "This will soft-delete the photo. It can be managed by admins. Cloud storage is not immediately purged.",
   "photoHiddenToast": "Hidden",
   "photoUnhiddenToast": "Unhidden",
   "photoDeletedToast": "Deleted",
@@ -303,5 +303,18 @@
   "emptyAlbumSubtitle": "Photos you take or pick will appear here",
   "processingPhotos": "Processing...",
   "readonlyMember": "You can browse photos shared by others",
-  "moreActions": "More actions"
+  "moreActions": "More actions",
+  "photosTitle": "{count} photos",
+  "@photosTitle": { "placeholders": { "count": { "type": "int" } } },
+  "photoUploadedBy": "Uploaded by {name}",
+  "@photoUploadedBy": { "placeholders": { "name": { "type": "String" } } },
+  "photoDimensions": "{width}×{height}",
+  "@photoDimensions": { "placeholders": { "width": { "type": "int" }, "height": { "type": "int" } } },
+  "photoStatus": "Status",
+  "photoHideAction": "Hide photo",
+  "photoPublishAction": "Publish again",
+  "shareScanHint": "Scan to view photos",
+  "shareNotPublic": "This link is not publicly accessible yet",
+  "hidePhotoTitle": "Hide this photo?",
+  "hidePhotoBody": "Viewers will no longer see this photo. Authorized album managers can publish it again."
 }