import '../domain/app_snapshot.dart';

abstract class SnapshotStore {
  Future<AppSnapshot?> load();
  Future<void> save(AppSnapshot snapshot);
  Future<AppSnapshot> restoreBackup() => Future.error(StateError('没有可恢复的备份'));
  Future<AppSnapshot> startFresh() => Future.error(StateError('无法重新建立保存文件'));
}