Add custom search terms & retry download (admin)

Add support for per-request custom search terms and an admin retry-download flow.

- DB/schema: add custom_search_terms column via Prisma migration and schema update.
- Admin UI: new AdjustSearchTermsModal component and UI badges to show custom search status; RequestActionsDropdown and RecentRequestsTable updated to surface adjust/retry actions.
- API: new PATCH /api/admin/requests/[id]/search-terms to set/clear custom terms (optionally trigger a new search) and new POST /api/admin/requests/[id]/retry-download to resume monitoring or re-add downloads using DownloadHistory metadata.
- Behavior: interactive search now prefers customSearchTerms when present; manual import exposes cleanupSource option to organize job; admin requests listing returns downloadAttempts and customSearchTerms.
- UX: add SectionToolbar, LoadMoreBar and HideAvailableToggle components and wire hide-available preference across home, search, author and series pages; authors/series endpoints/page handlers gain pagination metadata.
- Misc: add connection-errors util and update related processors/services and tests to cover the new flows.

These changes enable admins to override search terms per request, trigger searches from the admin UI, and retry failed downloads more robustly.

src/app/admin/components/RecentRequestsTable.tsx

@@ -28,6 +28,8 @@ interface RecentRequest {
   completedAt: Date | null;
   errorMessage: string | null;
   torrentUrl?: string | null;
+  downloadAttempts?: number;
+  customSearchTerms?: string | null;
 }
 
 interface User {
@@ -444,6 +446,29 @@ export function RecentRequestsTable({ ebookSidecarEnabled = false, annasArchiveB
     }
   };
 
+  const handleRetryDownload = async (requestId: string) => {
+    try {
+      const response = await fetchWithAuth(`/api/admin/requests/${requestId}/retry-download`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      });
+
+      const responseData = await response.json();
+
+      if (!response.ok) {
+        throw new Error(responseData.message || 'Failed to retry download');
+      }
+
+      toast.success(responseData.message || 'Download retry initiated');
+      await mutate(apiUrl);
+    } catch (error) {
+      console.error('[Admin] Failed to retry download:', error);
+      toast.error(`Failed to retry download: ${error instanceof Error ? error.message : 'Unknown error'}`);
+    }
+  };
+
   // Render loading state
   if (isLoading && !data) {
     return (
@@ -638,6 +663,17 @@ export function RecentRequestsTable({ ebookSidecarEnabled = false, annasArchiveB
                               Ebook
                             </span>
                           )}
+                          {request.customSearchTerms && (
+                            <span
+                              className="inline-flex items-center gap-1 px-2 py-0.5 text-xs font-medium rounded-full bg-blue-100 text-blue-700 dark:bg-blue-900 dark:text-blue-200"
+                              title={`Custom search: ${request.customSearchTerms}`}
+                            >
+                              <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
+                              </svg>
+                              Custom Search
+                            </span>
+                          )}
                         </div>
                         <div className="text-sm text-gray-500 dark:text-gray-400">
                           {request.author}
@@ -673,12 +709,16 @@ export function RecentRequestsTable({ ebookSidecarEnabled = false, annasArchiveB
                           type: request.type,
                           asin: request.asin,
                           torrentUrl: request.torrentUrl,
+                          downloadAttempts: request.downloadAttempts,
+                          customSearchTerms: request.customSearchTerms,
                         }}
                         onDelete={handleDeleteClick}
                         onManualSearch={handleManualSearch}
                         onCancel={handleCancel}
+                        onRetryDownload={handleRetryDownload}
                         onViewDetails={(asin) => handleViewDetails(asin, request.status)}
                         onFetchEbook={handleFetchEbook}
+                        onSearchTermsUpdated={() => mutate(apiUrl)}
                         ebookSidecarEnabled={ebookSidecarEnabled}
                         annasArchiveBaseUrl={annasArchiveBaseUrl}
                         isLoading={isDeleting || isFetchingEbook}
@@ -835,7 +875,6 @@ export function RecentRequestsTable({ ebookSidecarEnabled = false, annasArchiveB
           }}
           isAvailable={viewDetailsStatus === 'available' || viewDetailsStatus === 'completed'}
           requestStatus={viewDetailsStatus}
-          hideRequestActions
         />
       )}
     </div>