feat(mobile): Add selected assets to album (#901)

* First implementation that uses new API

* Various UI improvements

* Create new album from home screen

* Fix padding when in multiselect mode

* Alex Suggestions

* Change to album after creation

mobile/lib/modules/album/views/album_viewer_page.dart

@@ -53,13 +53,13 @@ class AlbumViewerPage extends HookConsumerWidget {
         if (returnPayload.selectedAdditionalAsset.isNotEmpty) {
           ImmichLoadingOverlayController.appLoader.show();
 
-          var isSuccess =
+          var addAssetsResult =
               await ref.watch(albumServiceProvider).addAdditionalAssetToAlbum(
                     returnPayload.selectedAdditionalAsset,
                     albumId,
                   );
 
-          if (isSuccess) {
+          if (addAssetsResult != null && addAssetsResult.successfullyAdded > 0) {
             ref.refresh(sharedAlbumDetailProvider(albumId));
           }