feat: show download/target paths for admin users

- Admin users see download path (SABnzbd storage / qBittorrent save_path)
- Admin users see target path (Sonarr series folder / Radarr movie folder)
- Paths displayed in monospace font at bottom of card details
- Non-admin users unaffected (paths not sent in API response)

server/utils/qbittorrent.js

@@ -198,6 +198,7 @@ function mapTorrentToDownload(torrent) {
     hash: torrent.hash,
     category: torrent.category,
     tags: torrent.tags,
+    savePath: torrent.save_path || torrent.content_path || null,
     qbittorrent: true
   };
 }