combine album name

mobile/lib/models/backup/backup_candidate.model.dart

@@ -3,19 +3,23 @@
 import 'package:photo_manager/photo_manager.dart';
 
 class BackupCandidate {
-  final String albumName;
+  final String id;
+  final List<String> albumName;
   final AssetEntity asset;
 
   BackupCandidate({
+    required this.id,
     required this.albumName,
     required this.asset,
   });
 
   BackupCandidate copyWith({
-    String? albumName,
+    String? id,
+    List<String>? albumName,
     AssetEntity? asset,
   }) {
     return BackupCandidate(
+      id: id ?? this.id,
       albumName: albumName ?? this.albumName,
       asset: asset ?? this.asset,
     );
@@ -28,9 +32,11 @@ class BackupCandidate {
   bool operator ==(covariant BackupCandidate other) {
     if (identical(this, other)) return true;
 
-    return other.albumName == albumName && other.asset == asset;
+    return other.id == id &&
+        other.albumName == albumName &&
+        other.asset == asset;
   }
 
   @override
-  int get hashCode => albumName.hashCode ^ asset.hashCode;
+  int get hashCode => id.hashCode ^ albumName.hashCode ^ asset.hashCode;
 }