feat(bookmark): improve pdf bookmark tool ui with dark mode and drag-drop

- Add dark mode styling to the bookmark tool page
- Implement drag-and-drop file upload zones for PDF, CSV and JSON
- Enhance file input UI with icons and better visual feedback
- Fix formatting and whitespace issues in multiple files

src/js/utils/lucide-init.ts

@@ -2,4 +2,4 @@ import { createIcons, icons } from 'lucide';
 
 document.addEventListener('DOMContentLoaded', () => {
   createIcons({ icons });
-});
+});