Admin requests: paginated API & UI overhaul

Add a paginated Admin Requests API and fully refactor the admin requests UI to support filtering, sorting, pagination, and URL state.

- New API: src/app/api/admin/requests/route.ts implements paginated, searchable, filterable, and sortable request listing with proper relation includes and pagination metadata.
- Frontend: RecentRequestsTable rewritten to fetch via SWR (authenticatedFetcher), read/write URL query params, debounce search, support status/user filters, sortable columns, page size selector, and full pagination UI; added loading/error states and toast feedback for actions.
- Admin page updated to use Suspense and the new RecentRequestsTable (component now fetches its own data).
- Settings: deprecated single download-client PUT route now maps updates into the new multi-client format (download_clients JSON), logs deprecation, and invalidates download client manager; settings GET now reads multi-client config for backward compatibility.
- Processors: monitor-download and retry-failed-imports updated to use the download-client-manager and new PathMappingConfig shape for path mapping logic.
- Minor API/schema updates: request-with-torrent schema extended (indexerId, infoUrl, protocol) and setup complete no longer writes legacy path keys.
- Tests updated to reflect API and processor changes.

This change centralizes request management on the server, modernizes the UI for large datasets, and migrates download client settings toward a multi-client configuration while keeping backward compatibility.

src/lib/processors/retry-failed-imports.processor.ts

@@ -9,7 +9,8 @@ import { prisma } from '../db';
 import { RMABLogger } from '../utils/logger';
 import { getJobQueueService } from '../services/job-queue.service';
 import { getConfigService } from '../services/config.service';
-import { PathMapper } from '../utils/path-mapper';
+import { getDownloadClientManager } from '../services/download-client-manager.service';
+import { PathMapper, PathMappingConfig } from '../utils/path-mapper';
 
 export interface RetryFailedImportsPayload {
   jobId?: string;
@@ -23,18 +24,23 @@ export async function processRetryFailedImports(payload: RetryFailedImportsPaylo
   logger.info('Starting retry job for requests awaiting import...');
 
   try {
-    // Load path mapping configuration once
+    // Initialize config and download client manager
     const configService = getConfigService();
-    const pathMappingConfig = await configService.getMany([
-      'download_client_remote_path_mapping_enabled',
-      'download_client_remote_path',
-      'download_client_local_path',
-    ]);
+    const manager = getDownloadClientManager(configService);
 
-    const mappingConfig = {
-      enabled: pathMappingConfig.download_client_remote_path_mapping_enabled === 'true',
-      remotePath: pathMappingConfig.download_client_remote_path || '',
-      localPath: pathMappingConfig.download_client_local_path || '',
+    // Helper function to get path mapping config for a specific download client type
+    const getPathMappingForClient = async (clientType: string): Promise<PathMappingConfig> => {
+      const protocol = clientType === 'sabnzbd' ? 'usenet' : 'torrent';
+      const clientConfig = await manager.getClientForProtocol(protocol);
+
+      if (clientConfig && clientConfig.remotePathMappingEnabled) {
+        return {
+          enabled: true,
+          remotePath: clientConfig.remotePath || '',
+          localPath: clientConfig.localPath || '',
+        };
+      }
+      return { enabled: false, remotePath: '', localPath: '' };
     };
 
     // Find all active requests in awaiting_import status
@@ -83,6 +89,10 @@ export async function processRetryFailedImports(payload: RetryFailedImportsPaylo
         let downloadPath: string;
 
         // Try to get download path from the appropriate download client
+        // Get path mapping for this specific download client
+        const clientType = downloadHistory.downloadClient || 'qbittorrent';
+        const mappingConfig = await getPathMappingForClient(clientType);
+
         if (downloadHistory.torrentHash) {
           // qBittorrent download
           try {