Add e-book fetch API and UI integration for requests

Introduces an API endpoint to trigger e-book downloads for completed requests, with admin UI integration in RecentRequestsTable and RequestActionsDropdown. Updates the admin dashboard to detect e-book sidecar feature availability from settings. Enhances torrent search result handling with info URLs, improves ranking algorithm normalization, and refines interactive search to show all results without threshold filtering. Also allows nullable ratings in request schemas.

src/app/admin/components/RecentRequestsTable.tsx

@@ -11,6 +11,7 @@ import { ConfirmDialog } from './ConfirmDialog';
 import { RequestActionsDropdown } from './RequestActionsDropdown';
 import { mutate } from 'swr';
 import { fetchWithAuth } from '@/lib/utils/api';
+import { useToast } from '@/components/ui/Toast';
 
 interface RecentRequest {
   requestId: string;
@@ -26,6 +27,7 @@ interface RecentRequest {
 
 interface RecentRequestsTableProps {
   requests: RecentRequest[];
+  ebookSidecarEnabled?: boolean;
 }
 
 function getStatusBadge(status: string) {
@@ -62,13 +64,15 @@ function getStatusBadge(status: string) {
   );
 }
 
-export function RecentRequestsTable({ requests }: RecentRequestsTableProps) {
+export function RecentRequestsTable({ requests, ebookSidecarEnabled = false }: RecentRequestsTableProps) {
   const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
   const [selectedRequest, setSelectedRequest] = useState<{
     id: string;
     title: string;
   } | null>(null);
   const [isDeleting, setIsDeleting] = useState(false);
+  const [isFetchingEbook, setIsFetchingEbook] = useState(false);
+  const toast = useToast();
 
   const handleDeleteClick = (requestId: string, title: string) => {
     setSelectedRequest({ id: requestId, title });
@@ -110,11 +114,7 @@ export function RecentRequestsTable({ requests }: RecentRequestsTableProps) {
       setSelectedRequest(null);
     } catch (error) {
       console.error('[Admin] Failed to delete request:', error);
-      alert(
-        `Failed to delete request: ${
-          error instanceof Error ? error.message : 'Unknown error'
-        }`
-      );
+      toast.error(`Failed to delete request: ${error instanceof Error ? error.message : 'Unknown error'}`);
     } finally {
       setIsDeleting(false);
     }
@@ -144,11 +144,7 @@ export function RecentRequestsTable({ requests }: RecentRequestsTableProps) {
       await mutate('/api/admin/requests/recent');
     } catch (error) {
       console.error('[Admin] Failed to trigger manual search:', error);
-      alert(
-        `Failed to trigger manual search: ${
-          error instanceof Error ? error.message : 'Unknown error'
-        }`
-      );
+      toast.error(`Failed to trigger manual search: ${error instanceof Error ? error.message : 'Unknown error'}`);
     }
   };
 
@@ -172,11 +168,36 @@ export function RecentRequestsTable({ requests }: RecentRequestsTableProps) {
       await mutate('/api/admin/requests/recent');
     } catch (error) {
       console.error('[Admin] Failed to cancel request:', error);
-      alert(
-        `Failed to cancel request: ${
-          error instanceof Error ? error.message : 'Unknown error'
-        }`
-      );
+      toast.error(`Failed to cancel request: ${error instanceof Error ? error.message : 'Unknown error'}`);
+    }
+  };
+
+  const handleFetchEbook = async (requestId: string) => {
+    setIsFetchingEbook(true);
+    try {
+      const response = await fetchWithAuth(`/api/requests/${requestId}/fetch-ebook`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        throw new Error(data.error || data.message || 'Failed to fetch e-book');
+      }
+
+      if (data.success) {
+        toast.success(data.message || 'E-book fetched successfully');
+      } else {
+        toast.warning(`E-book fetch failed: ${data.message}`);
+      }
+    } catch (error) {
+      console.error('[Admin] Failed to fetch e-book:', error);
+      toast.error(`Failed to fetch e-book: ${error instanceof Error ? error.message : 'Unknown error'}`);
+    } finally {
+      setIsFetchingEbook(false);
     }
   };
 
@@ -282,7 +303,9 @@ export function RecentRequestsTable({ requests }: RecentRequestsTableProps) {
                     onDelete={handleDeleteClick}
                     onManualSearch={handleManualSearch}
                     onCancel={handleCancel}
-                    isLoading={isDeleting}
+                    onFetchEbook={handleFetchEbook}
+                    ebookSidecarEnabled={ebookSidecarEnabled}
+                    isLoading={isDeleting || isFetchingEbook}
                   />
                 </td>
               </tr>