File rename templates & admin torrent approval

Add support for admin-driven interactive torrent selection and a file rename/template feature. Integrates an InteractiveTorrentSearchModal into the pending-approval admin UI, adds an admin approve flow that accepts an admin-selected torrent, and surfaces user/admin-selected torrent details in the UI. Introduces fileRenameEnabled and fileRenameTemplate settings (API + UI), persists them to configuration, and clears related caches. Pass renameConfig through the organize/organizeEbook flows and implement renaming in the FileOrganizer (single/multi-file handling). Enhance path-template utilities with conditional block resolution, filename-template validation, mock filename previews, and a buildRenamedFilename helper. Update tests to cover conditional templates and filename preview behavior.

src/app/api/requests/[id]/interactive-search/route.ts

@@ -67,8 +67,8 @@ export async function POST(
         );
       }
 
-      // Check if request is awaiting approval
-      if (requestRecord.status === 'awaiting_approval') {
+      // Check if request is awaiting approval (admins can still search to override the user's selection)
+      if (requestRecord.status === 'awaiting_approval' && req.user.role !== 'admin') {
         return NextResponse.json(
           { error: 'AwaitingApproval', message: 'This request is awaiting admin approval. You cannot search for torrents until it is approved.' },
           { status: 403 }