feat: enhance backup and restore functionality with integrity checks and progress tracking

- Added support for backup integrity verification during export and restore processes.
- Introduced progress dispatching for backup export and restore operations.
- Implemented new API endpoints for inspecting remote backup integrity.
- Enhanced user interface with progress indicators and warning dialogs for integrity issues.
- Updated localization strings for new features and user feedback.
- Refactored backup-related functions for better clarity and maintainability.

webapp/src/lib/backup-restore-progress.ts

@@ -0,0 +1,27 @@
+export type BackupProgressOperation = 'backup-restore' | 'backup-export' | 'backup-remote-run';
+
+export interface BackupProgressDetail {
+  operation: BackupProgressOperation;
+  source?: 'local' | 'remote';
+  step: string;
+  fileName: string;
+  stageTitle?: string;
+  stageDetail?: string;
+  replaceExisting?: boolean;
+  done?: boolean;
+  ok?: boolean;
+  error?: string | null;
+  Date?: string;
+}
+
+export type BackupRestoreProgressDetail = BackupProgressDetail;
+
+export const BACKUP_PROGRESS_EVENT = 'nodewarden:backup-progress';
+export const BACKUP_RESTORE_PROGRESS_EVENT = BACKUP_PROGRESS_EVENT;
+
+export function dispatchBackupProgress(detail: BackupProgressDetail): void {
+  if (typeof window === 'undefined') return;
+  window.dispatchEvent(new CustomEvent<BackupProgressDetail>(BACKUP_PROGRESS_EVENT, { detail }));
+}
+
+export const dispatchBackupRestoreProgress = dispatchBackupProgress;