Source Code added

mobile/lib/providers/asset_viewer/current_asset.provider.dart

@@ -0,0 +1,15 @@
+import 'package:immich_mobile/entities/asset.entity.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'current_asset.provider.g.dart';
+
+@riverpod
+class CurrentAsset extends _$CurrentAsset {
+  @override
+  Asset? build() => null;
+
+  void set(Asset? a) => state = a;
+}
+
+/// Mock class for testing
+abstract class CurrentAssetInternal extends _$CurrentAsset {}