базовая логика скачивания обновлений

lib/features/launcher/domain/entities/client_sync_status.dart

@@ -0,0 +1,33 @@
+import 'package:moonwell_launcher/features/downloader/domain/entities/download_progress.dart';
+
+enum ClientSyncStage {
+  fetchingManifest,
+  scanningLocalFiles,
+  comparingFiles,
+  removingStaleFiles,
+  downloadingFiles,
+  verifyingInstallation,
+  completed,
+}
+
+final class ClientSyncStatus {
+  final ClientSyncStage stage;
+  final DownloadProgress progress;
+  final String message;
+  final String? currentPath;
+  final String? localBuildHash;
+  final String? remoteBuildHash;
+  final int processedFiles;
+  final int totalFiles;
+
+  const ClientSyncStatus({
+    required this.stage,
+    required this.progress,
+    required this.message,
+    required this.currentPath,
+    required this.localBuildHash,
+    required this.remoteBuildHash,
+    required this.processedFiles,
+    required this.totalFiles,
+  });
+}