fix(web): update useWebSocket test to expect withCredentials option

PR #547 added withCredentials: true to the socket.io connection
options but the test assertion was not updated, causing CI failure.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/hooks/useWebSocket.test.tsx

@@ -47,6 +47,7 @@ describe("useWebSocket", (): void => {
     expect(io).toHaveBeenCalledWith(expect.any(String), {
       auth: { token },
       query: { workspaceId },
+      withCredentials: true,
     });
   });