Big update this one
- Caching: Caches search results (72 hours), mirror URLs (7 days), and book covers (for length of search) to minimise network requests and improve performance
- Preferences: Filter results by preferred languages, file types, and book types
- Book Cover Previews: Display cover images in download previews
- Background Downloads: Downloads run in the background using curl, with non-blocking UI updates
- Automatic Curl Updates: Ensures a compatible curl version (8.17.0+) is available
- Automatic Retry Logic: Fallback to other available urls if connection fails
- Safe File Handling: Automatic filename sanitisation and directory management