Add Transmission/NZBGet and per-client paths and much more

Extend multi-download-client support to include Transmission and NZBGet and introduce per-client custom download paths. Adds protocol mapping and new client types, Transmission/NZBGet integration services, API CRUD and validation changes, UI components/modal updates and live path previews, and manager routing by protocol. Includes DB migrations (download_path on download_history, interactive_search_access on users), schema updates, and related processor/service fixes and tests to ensure backward compatibility and proper path resolution.

src/app/admin/settings/tabs/PathsTab/PathsTab.tsx

@@ -18,6 +18,12 @@ interface PathsTabProps {
   onValidationChange: (isValid: boolean) => void;
 }
 
+interface TemplatePreview {
+  isValid: boolean;
+  error?: string;
+  previewPaths?: string[];
+}
+
 export function PathsTab({ paths, onChange, onValidationChange }: PathsTabProps) {
   const { testing, testResult, updatePath, testPaths } = usePathsSettings({
     paths,
@@ -25,31 +31,52 @@ export function PathsTab({ paths, onChange, onValidationChange }: PathsTabProps)
     onValidationChange,
   });
 
-  // Live preview state (client-side validation)
-  const [livePreview, setLivePreview] = useState<{
-    isValid: boolean;
-    error?: string;
-    previewPaths?: string[];
-  } | null>(null);
+  // Live preview state for audiobook template
+  const [audiobookPreview, setAudiobookPreview] = useState<TemplatePreview | null>(null);
 
-  // Update live preview whenever template changes
+  // Live preview state for ebook template
+  const [ebookPreview, setEbookPreview] = useState<TemplatePreview | null>(null);
+
+  // Update audiobook live preview whenever template changes
   useEffect(() => {
     const template = paths.audiobookPathTemplate || '{author}/{title} {asin}';
     const validation = validateTemplate(template);
 
     if (validation.valid) {
-      setLivePreview({
+      setAudiobookPreview({
         isValid: true,
         previewPaths: generateMockPreviews(template),
       });
     } else {
-      setLivePreview({
+      setAudiobookPreview({
         isValid: false,
         error: validation.error,
       });
     }
   }, [paths.audiobookPathTemplate]);
 
+  // Update ebook live preview whenever template changes
+  useEffect(() => {
+    const template = paths.ebookPathTemplate || '{author}/{title} {asin}';
+    const validation = validateTemplate(template);
+
+    if (validation.valid) {
+      setEbookPreview({
+        isValid: true,
+        previewPaths: generateMockPreviews(template),
+      });
+    } else {
+      setEbookPreview({
+        isValid: false,
+        error: validation.error,
+      });
+    }
+  }, [paths.ebookPathTemplate]);
+
+  const audiobookTemplate = paths.audiobookPathTemplate || '{author}/{title} {asin}';
+  const ebookTemplate = paths.ebookPathTemplate || '{author}/{title} {asin}';
+  const ebookMatchesAudiobook = ebookTemplate === audiobookTemplate;
+
   return (
     <div className="space-y-6 max-w-2xl">
       <div>
@@ -74,7 +101,7 @@ export function PathsTab({ paths, onChange, onValidationChange }: PathsTabProps)
           className="font-mono"
         />
         <p className="text-sm text-gray-500 dark:text-gray-400 mt-1">
-          Temporary location for torrent downloads (kept for seeding)
+          Temporary location for downloads before they are organized into the media library
         </p>
       </div>
 
@@ -111,61 +138,24 @@ export function PathsTab({ paths, onChange, onValidationChange }: PathsTabProps)
           Customize how audiobooks are organized within the media directory
         </p>
 
-        {/* Variable Reference Panel */}
-        <div className="mt-4 bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800 rounded-lg p-4">
-          <h3 className="text-sm font-semibold text-blue-900 dark:text-blue-100 mb-3">
-            Available Variables
-          </h3>
-          <div className="grid grid-cols-1 sm:grid-cols-2 gap-2 text-sm">
-            <div>
-              <code className="text-blue-700 dark:text-blue-300 font-mono">{'{author}'}</code>
-              <span className="text-gray-600 dark:text-gray-400 ml-2">- Book author</span>
-            </div>
-            <div>
-              <code className="text-blue-700 dark:text-blue-300 font-mono">{'{title}'}</code>
-              <span className="text-gray-600 dark:text-gray-400 ml-2">- Book title</span>
-            </div>
-            <div>
-              <code className="text-blue-700 dark:text-blue-300 font-mono">{'{narrator}'}</code>
-              <span className="text-gray-600 dark:text-gray-400 ml-2">- Narrator name</span>
-            </div>
-            <div>
-              <code className="text-blue-700 dark:text-blue-300 font-mono">{'{year}'}</code>
-              <span className="text-gray-600 dark:text-gray-400 ml-2">- Release year</span>
-            </div>
-            <div>
-              <code className="text-blue-700 dark:text-blue-300 font-mono">{'{asin}'}</code>
-              <span className="text-gray-600 dark:text-gray-400 ml-2">- Audible ASIN</span>
-            </div>
-            <div>
-              <code className="text-blue-700 dark:text-blue-300 font-mono">{'{series}'}</code>
-              <span className="text-gray-600 dark:text-gray-400 ml-2">- Book series name</span>
-            </div>
-            <div>
-              <code className="text-blue-700 dark:text-blue-300 font-mono">{'{seriesPart}'}</code>
-              <span className="text-gray-600 dark:text-gray-400 ml-2">- Series part/position</span>
-            </div>
-          </div>
-        </div>
-
-        {/* Live Preview - Client-side validation */}
-        {livePreview && !livePreview.isValid && (
+        {/* Audiobook Validation Error */}
+        {audiobookPreview && !audiobookPreview.isValid && (
           <div className="mt-3 p-3 rounded-lg text-sm flex items-start gap-2 bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 text-red-800 dark:text-red-200">
             <span className="flex-shrink-0 mt-0.5">✗</span>
             <div className="flex-1">
-              <span>{livePreview.error || 'Invalid template format'}</span>
+              <span>{audiobookPreview.error || 'Invalid template format'}</span>
             </div>
           </div>
         )}
 
-        {/* Live Preview Examples - Show while editing */}
-        {livePreview && livePreview.isValid && livePreview.previewPaths && (
+        {/* Audiobook Preview Examples */}
+        {audiobookPreview && audiobookPreview.isValid && audiobookPreview.previewPaths && (
           <div className="mt-3 bg-gray-50 dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg p-4">
             <h4 className="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-2">
               Preview Examples
             </h4>
             <div className="space-y-1.5 text-sm font-mono text-gray-700 dark:text-gray-300">
-              {livePreview.previewPaths.map((preview, index) => (
+              {audiobookPreview.previewPaths.map((preview, index) => (
                 <div key={index} className="text-xs">
                   {paths.mediaDir || '/media/audiobooks'}/{preview}
                 </div>
@@ -175,6 +165,96 @@ export function PathsTab({ paths, onChange, onValidationChange }: PathsTabProps)
         )}
       </div>
 
+      {/* Ebook Organization Template */}
+      <div>
+        <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
+          Ebook Organization Template
+        </label>
+        <div className="flex gap-2">
+          <Input
+            type="text"
+            value={paths.ebookPathTemplate || '{author}/{title} {asin}'}
+            onChange={(e) => updatePath('ebookPathTemplate', e.target.value)}
+            placeholder="{author}/{title} {asin}"
+            className="font-mono flex-1"
+          />
+          <Button
+            variant="outline"
+            onClick={() => updatePath('ebookPathTemplate', paths.audiobookPathTemplate || '{author}/{title} {asin}')}
+            disabled={ebookMatchesAudiobook}
+            className="whitespace-nowrap text-sm"
+          >
+            Match Audiobook
+          </Button>
+        </div>
+        <p className="text-sm text-gray-500 dark:text-gray-400 mt-1">
+          Customize how ebooks are organized within the media directory
+        </p>
+
+        {/* Ebook Validation Error */}
+        {ebookPreview && !ebookPreview.isValid && (
+          <div className="mt-3 p-3 rounded-lg text-sm flex items-start gap-2 bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 text-red-800 dark:text-red-200">
+            <span className="flex-shrink-0 mt-0.5">✗</span>
+            <div className="flex-1">
+              <span>{ebookPreview.error || 'Invalid template format'}</span>
+            </div>
+          </div>
+        )}
+
+        {/* Ebook Preview Examples */}
+        {ebookPreview && ebookPreview.isValid && ebookPreview.previewPaths && (
+          <div className="mt-3 bg-gray-50 dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg p-4">
+            <h4 className="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-2">
+              Preview Examples
+            </h4>
+            <div className="space-y-1.5 text-sm font-mono text-gray-700 dark:text-gray-300">
+              {ebookPreview.previewPaths.map((preview, index) => (
+                <div key={index} className="text-xs">
+                  {paths.mediaDir || '/media/audiobooks'}/{preview}
+                </div>
+              ))}
+            </div>
+          </div>
+        )}
+      </div>
+
+      {/* Variable Reference Panel (shared for both templates) */}
+      <div className="bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800 rounded-lg p-4">
+        <h3 className="text-sm font-semibold text-blue-900 dark:text-blue-100 mb-3">
+          Available Variables
+        </h3>
+        <div className="grid grid-cols-1 sm:grid-cols-2 gap-2 text-sm">
+          <div>
+            <code className="text-blue-700 dark:text-blue-300 font-mono">{'{author}'}</code>
+            <span className="text-gray-600 dark:text-gray-400 ml-2">- Book author</span>
+          </div>
+          <div>
+            <code className="text-blue-700 dark:text-blue-300 font-mono">{'{title}'}</code>
+            <span className="text-gray-600 dark:text-gray-400 ml-2">- Book title</span>
+          </div>
+          <div>
+            <code className="text-blue-700 dark:text-blue-300 font-mono">{'{narrator}'}</code>
+            <span className="text-gray-600 dark:text-gray-400 ml-2">- Narrator name</span>
+          </div>
+          <div>
+            <code className="text-blue-700 dark:text-blue-300 font-mono">{'{year}'}</code>
+            <span className="text-gray-600 dark:text-gray-400 ml-2">- Release year</span>
+          </div>
+          <div>
+            <code className="text-blue-700 dark:text-blue-300 font-mono">{'{asin}'}</code>
+            <span className="text-gray-600 dark:text-gray-400 ml-2">- Audible ASIN</span>
+          </div>
+          <div>
+            <code className="text-blue-700 dark:text-blue-300 font-mono">{'{series}'}</code>
+            <span className="text-gray-600 dark:text-gray-400 ml-2">- Book series name</span>
+          </div>
+          <div>
+            <code className="text-blue-700 dark:text-blue-300 font-mono">{'{seriesPart}'}</code>
+            <span className="text-gray-600 dark:text-gray-400 ml-2">- Series part/position</span>
+          </div>
+        </div>
+      </div>
+
       {/* Metadata Tagging Toggle */}
       <div className="bg-gray-50 dark:bg-gray-800 rounded-lg p-4 border border-gray-200 dark:border-gray-700">
         <div className="flex items-start gap-4">