Advance existing requests from Interactive Search

Pass requestId and requestedByUserId through request list and card components and into AudiobookDetailsModal. Add ADVANCEABLE_FROM_INTERACTIVE_SEARCH constant and logic so the Interactive Search modal routes to /api/requests/[id]/select-torrent for own/admin advanceable requests instead of creating a new request. Fix download-token usage to use the in-flight request id, extend Audiobook type with requestedByUserId, and add tests covering advance-vs-create routing and select-torrent behavior.

tests/components/requests/InteractiveTorrentSearchModal.test.tsx

@@ -118,6 +118,9 @@ describe('InteractiveTorrentSearchModal', () => {
     await waitFor(() => {
       expect(selectTorrentMock).toHaveBeenCalledWith('req-123', baseResult);
     });
+    // When requestId is set, the modal must NOT fall into the create-new-request
+    // branch — that's the routing fix for own-request advanceable states.
+    expect(requestWithTorrentMock).not.toHaveBeenCalled();
     expect(onSuccess).toHaveBeenCalled();
     expect(onClose).toHaveBeenCalled();
   });