feat(mobile): add album description functionality (#18886)

* feat(mobile): add album description functionality

- Introduced a new optional `description` field in the `Album` entity.
- Updated `AlbumViewerPageState` to manage `editDescriptionText`.
- Created `AlbumDescription` and `AlbumViewerEditableDescription` widgets for displaying and editing album descriptions.
- Enhanced `CreateAlbumPage` to include a description input field.
- Implemented backend support for updating album descriptions in `AlbumApiRepository` and `AlbumService`.
- Updated sync logic to handle album descriptions during data synchronization.
- Adjusted UI components to accommodate the new description feature.

* fix dart analysis error

* remove comment that shouldn't be there

* Album header styling

* fix: disable edit after album creation

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/pages/album/album_date_range.dart

@@ -30,15 +30,12 @@ class AlbumDateRange extends ConsumerWidget {
     final (startDate, endDate, shared) = data;
 
     return Padding(
-      padding: shared
-          ? const EdgeInsets.only(
-              left: 16.0,
-              bottom: 0.0,
-            )
-          : const EdgeInsets.only(left: 16.0, bottom: 8.0),
+      padding: const EdgeInsets.only(left: 16.0),
       child: Text(
         _getDateRangeText(startDate, endDate),
-        style: context.textTheme.labelLarge,
+        style: context.textTheme.labelLarge?.copyWith(
+          color: context.colorScheme.onSurfaceVariant,
+        ),
       ),
     );
   }