feat: enhance backup and download functionalities

- Updated `BackupCenterPage` to support download progress tracking during remote backup downloads.
- Modified `ImportPage` to simplify export functionality by removing unnecessary payload handling.
- Improved `JwtWarningPage` to utilize a new clipboard utility for copying text with feedback.
- Enhanced `PublicSendPage` to show download progress for files being downloaded.
- Updated `RecoverTwoFactorPage` to include autocomplete attributes for better user experience.
- Refactored `SendsPage` to use the new clipboard utility for copying access URLs.
- Enhanced `SettingsPage` to utilize the clipboard utility for copying sensitive information.
- Improved `TotpCodesPage` to use the clipboard utility for copying TOTP codes.
- Updated `VaultPage` and related components to support download progress for attachments.
- Introduced a new `app-notify` module for consistent notification handling across the application.
- Created a `clipboard` utility for improved clipboard interactions with user feedback.
- Added progress tracking for file downloads in the API layer, enhancing user experience during downloads.

webapp/src/components/backup-center/BackupDestinationDetail.tsx

@@ -27,6 +27,7 @@ interface BackupDestinationDetailProps {
   remoteBrowserTotalPages: number;
   loadingRemoteBrowser: boolean;
   downloadingRemotePath: string;
+  downloadingRemotePercent: number | null;
   restoringRemotePath: string;
   deletingRemotePath: string;
   onSaveSettings: () => void;
@@ -511,6 +512,7 @@ export function BackupDestinationDetail(props: BackupDestinationDetailProps) {
             currentPage={props.remoteBrowserCurrentPage}
             totalPages={props.remoteBrowserTotalPages}
             downloadingRemotePath={props.downloadingRemotePath}
+            downloadingRemotePercent={props.downloadingRemotePercent}
             restoringRemotePath={props.restoringRemotePath}
             deletingRemotePath={props.deletingRemotePath}
             onRefresh={props.onRefreshRemoteBrowser}