fix: the Activity test's page carries clients_down as a value, not a literal Page<T> would refuse (M502 #5523)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/lib/components/wanted/DownloadList.test.ts

@@ -51,10 +51,10 @@ function download(id: string, extra: Partial<Download> = {}): Download {
 afterEach(() => vi.clearAllMocks());
 
 function setup(items: Download[], clientsDown: ClientDown[] = []) {
+  // The Activity page carries the clients not answering beside its items.
+  const page = { items, total: items.length, limit: 50, offset: 0, clients_down: clientsDown };
   vi.mocked(createDownloadsQuery).mockReturnValue(
-    mockInfiniteQuery({
-      pages: [{ items, total: items.length, limit: 50, offset: 0, clients_down: clientsDown }]
-    }) as unknown as ReturnType<
+    mockInfiniteQuery({ pages: [page] }) as unknown as ReturnType<
       typeof createDownloadsQuery
     >
   );