Add Deluge integration; revamp admin Jobs & Logs UI

Introduce Deluge download client service and tests, remove obsolete rdtclient service, and update qbittorrent integration/tests and download-client interfaces/manager. Large UI refactor for admin pages: Jobs and Logs were redesigned to be responsive (mobile card views + desktop tables), improved headers, dialogs, controls, and better status/detail rendering. Also updated DownloadClient components (card, management, modal), organize-files processor, audible-series integration, and related unit tests to align with integration changes. Minor UX and accessibility tweaks, cron handling/validation adjustments, and a few formatting/cleanup fixes throughout.

tests/processors/monitor-download.processor.test.ts

@@ -343,9 +343,9 @@ describe('processMonitorDownload', () => {
       requestId: 'req-6',
       downloadHistoryId: 'dh-6',
       downloadClientId: 'id-6',
-      downloadClient: 'deluge',
+      downloadClient: 'rtorrent',
       jobId: 'job-6',
-    })).rejects.toThrow(/Unknown download client type: deluge/);
+    })).rejects.toThrow(/Unknown download client type: rtorrent/);
 
     expect(prismaMock.request.update).toHaveBeenCalledWith(
       expect.objectContaining({