Enable ebook interactive search and job routing

Add support for interactive ebook searches and streamline search job routing. Key changes:

- RequestActionsDropdown: loosened status checks for search/adjust actions, route interactive search to an ebook-specific modal when the request is an ebook, and pass request.customSearchTerms to the ebook search modal.
- API: interactive-search-ebook route now supports two flows (direct ebook requests and audiobook sidecar ebook searches), updates validation logic, checks for existing child ebook requests only in sidecar mode, and improves logging. manual-search route now dispatches addSearchEbookJob for ebook requests and addSearchJob for audiobooks.
- RequestCard: removed manual/interactive search UI, related hooks and modal usage (interactive search is handled via the admin dropdown/modal now).

These changes enable direct ebook interactive search flows, prevent invalid searches based on request type/status, and ensure the correct background job is enqueued per request type.

src/components/requests/RequestCard.tsx

@@ -9,11 +9,9 @@ import React from 'react';
 import Image from 'next/image';
 import { StatusBadge } from './StatusBadge';
 import { Button } from '@/components/ui/Button';
-import { useCancelRequest, useManualSearch } from '@/lib/hooks/useRequests';
+import { useCancelRequest } from '@/lib/hooks/useRequests';
 import { cn } from '@/lib/utils/cn';
 import { usePreferences } from '@/contexts/PreferencesContext';
-import { useAuth } from '@/contexts/AuthContext';
-import { InteractiveTorrentSearchModal } from './InteractiveTorrentSearchModal';
 import { AudiobookDetailsModal } from '@/components/audiobooks/AudiobookDetailsModal';
 import { COMPLETED_STATUSES } from '@/lib/constants/request-statuses';
 
@@ -43,11 +41,8 @@ interface RequestCardProps {
 
 export function RequestCard({ request, showActions = true }: RequestCardProps) {
   const { cancelRequest, isLoading } = useCancelRequest();
-  const { triggerManualSearch, isLoading: isManualSearching } = useManualSearch();
   const { squareCovers } = usePreferences();
-  const { user } = useAuth();
   const [showError, setShowError] = React.useState(false);
-  const [showInteractiveSearch, setShowInteractiveSearch] = React.useState(false);
   const [showDetailsModal, setShowDetailsModal] = React.useState(false);
 
   const requestType = request.type || 'audiobook';
@@ -57,10 +52,6 @@ export function RequestCard({ request, showActions = true }: RequestCardProps) {
   const canCancel = ['pending', 'searching', 'downloading'].includes(request.status);
   const isActive = ['searching', 'downloading', 'processing'].includes(request.status);
   const isFailed = request.status === 'failed';
-  // Ebook requests don't support interactive search (Anna's Archive only)
-  // Interactive search also requires the interactiveSearch permission
-  const hasInteractiveSearchAccess = user?.role === 'admin' || user?.permissions?.interactiveSearch !== false;
-  const canSearch = hasInteractiveSearchAccess && !isEbook && ['pending', 'failed', 'awaiting_search'].includes(request.status);
 
   const handleCancel = async () => {
     if (window.confirm('Are you sure you want to cancel this request?')) {
@@ -72,20 +63,6 @@ export function RequestCard({ request, showActions = true }: RequestCardProps) {
     }
   };
 
-  const handleManualSearch = async () => {
-    try {
-      await triggerManualSearch(request.id);
-      // Request list will auto-refresh via SWR
-    } catch (error) {
-      console.error('Failed to trigger manual search:', error);
-      alert(error instanceof Error ? error.message : 'Failed to trigger manual search');
-    }
-  };
-
-  const handleInteractiveSearch = () => {
-    setShowInteractiveSearch(true);
-  };
-
   const formatDate = (dateString: string) => {
     const date = new Date(dateString);
     const now = new Date();
@@ -255,27 +232,6 @@ export function RequestCard({ request, showActions = true }: RequestCardProps) {
             {/* Action Buttons */}
             {showActions && (
               <div className="flex flex-wrap gap-2">
-                {canSearch && (
-                  <>
-                    <Button
-                      onClick={handleManualSearch}
-                      loading={isManualSearching}
-                      variant="outline"
-                      size="sm"
-                      className="text-xs sm:text-sm"
-                    >
-                      Manual Search
-                    </Button>
-                    <Button
-                      onClick={handleInteractiveSearch}
-                      variant="primary"
-                      size="sm"
-                      className="text-xs sm:text-sm"
-                    >
-                      Interactive Search
-                    </Button>
-                  </>
-                )}
                 {canCancel && (
                   <Button
                     onClick={handleCancel}
@@ -293,17 +249,6 @@ export function RequestCard({ request, showActions = true }: RequestCardProps) {
         </div>
       </div>
 
-      {/* Interactive Search Modal */}
-      <InteractiveTorrentSearchModal
-        isOpen={showInteractiveSearch}
-        onClose={() => setShowInteractiveSearch(false)}
-        requestId={request.id}
-        audiobook={{
-          title: request.audiobook.title,
-          author: request.audiobook.author,
-        }}
-      />
-
       {/* Audiobook Details Modal */}
       {request.audiobook.audibleAsin && (
         <AudiobookDetailsModal