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/SendsPage.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useMemo, useState } from 'preact/hooks';
 import { CheckCheck, ChevronLeft, Copy, Eye, EyeOff, File, FileText, LayoutGrid, Pencil, Plus, RefreshCw, Save, Send as SendIcon, Trash2, X } from 'lucide-preact';
+import { copyTextToClipboard } from '@/lib/clipboard';
 import type { Send, SendDraft } from '@/lib/types';
 import { t } from '@/lib/i18n';
 
@@ -211,8 +212,7 @@ export default function SendsPage(props: SendsPageProps) {
 
   function copyAccessUrl(send: Send): void {
     const url = send.shareUrl || `${window.location.origin}/#/send/${send.accessId}`;
-    void navigator.clipboard.writeText(url);
-    props.onNotify('success', t('txt_link_copied'));
+    void copyTextToClipboard(url, { successMessage: t('txt_link_copied') });
   }
 
   return (