fix: update renderlist after asset deleted (#16786)

Author: Saschl

mobile/lib/pages/common/gallery_viewer.page.dart

@@ -263,10 +263,6 @@ class GalleryViewerPage extends HookConsumerWidget {
     PhotoViewGalleryPageOptions buildAsset(BuildContext context, int index) {
       var newAsset = loadAsset(index);
 
-      WidgetsBinding.instance.addPostFrameCallback((_) {
-        ref.read(currentAssetProvider.notifier).set(newAsset);
-      });
-
       final stackId = newAsset.stackId;
       if (stackId != null && currentIndex.value == index) {
         final stackElements =

mobile/lib/widgets/asset_viewer/bottom_gallery_bar.dart

@@ -95,6 +95,11 @@ class BottomGalleryBar extends ConsumerWidget {
 
           totalAssets.value -= 1;
         }
+        if (isDeleted) {
+          ref
+              .read(currentAssetProvider.notifier)
+              .set(renderList.loadAsset(assetIndex.value));
+        }
         return isDeleted;
       }