feat: show "appears in" albums on asset viewer bottom sheet

fix: multiple RemoteAlbumPages in navigation stack

this also allows us to not have to set the current album before navigating to RemoteAlbumPage

chore: clarification comments

handle nested album pages

fix: hide "appears in" when an asset is not in any albums

fix: way more bottom padding

for some reason we can't query the safe area here :/

mobile/lib/presentation/pages/drift_remote_album.page.dart

@@ -221,14 +221,15 @@ class _RemoteAlbumPageState extends ConsumerState<RemoteAlbumPage> {
   @override
   Widget build(BuildContext context) {
     return PopScope(
+      canPop: false,
       onPopInvokedWithResult: (didPop, _) {
-        if (didPop) {
-          Future.microtask(() {
-            if (mounted) {
-              ref.read(currentRemoteAlbumProvider.notifier).dispose();
-              ref.read(remoteAlbumProvider.notifier).refresh();
-            }
-          });
+        if (didPop || !mounted) {
+          return;
+        }
+        final hasAncestor = context.findAncestorWidgetOfExactType<RemoteAlbumPage>() != null;
+        Navigator.of(context).pop();
+        if (!hasAncestor) {
+          ref.read(currentRemoteAlbumProvider.notifier).dispose();
         }
       },
       child: ProviderScope(