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.

src/components/admin/download-clients/DownloadClientManagement.tsx

@@ -253,7 +253,7 @@ export function DownloadClientManagement({
         <h3 className="text-lg font-semibold text-gray-900 dark:text-gray-100 mb-3">
           Add Download Client
         </h3>
-        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-5 gap-4">
+        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-5 gap-4">
           {/* qBittorrent Card */}
           <div className={`bg-white dark:bg-gray-800 rounded-lg shadow-md border border-gray-200 dark:border-gray-700 p-6${hasTorrentClient ? ' opacity-50' : ''}`}>
             <div className="flex items-start justify-between mb-3">
@@ -316,15 +316,15 @@ export function DownloadClientManagement({
             )}
           </div>
 
-          {/* RDT-Client Card */}
+          {/* Deluge Card */}
           <div className={`bg-white dark:bg-gray-800 rounded-lg shadow-md border border-gray-200 dark:border-gray-700 p-6${hasTorrentClient ? ' opacity-50' : ''}`}>
             <div className="flex items-start justify-between mb-3">
               <div>
                 <h4 className="text-base font-semibold text-gray-900 dark:text-gray-100 mb-1">
-                  RDT-Client
+                  Deluge
                 </h4>
                 <p className="text-sm text-gray-600 dark:text-gray-400">
-                  Torrent / Debrid
+                  Torrent downloads
                 </p>
               </div>
               <span className="inline-block text-xs px-2 py-1 rounded bg-teal-100 dark:bg-teal-900/30 text-teal-700 dark:text-teal-300 font-medium">
@@ -337,12 +337,12 @@ export function DownloadClientManagement({
               </div>
             ) : (
               <Button
-                onClick={() => handleAddClient('rdtclient')}
+                onClick={() => handleAddClient('deluge')}
                 variant="primary"
                 size="sm"
                 disabled={loading}
               >
-                Add RDT-Client
+                Add Deluge
               </Button>
             )}
           </div>