Starting the Viewer with --connect now also starts a local Viewer server containing a message proxy, the viewer-control service, and the Viewer catalog.
The Viewer server uses a free port by default; pass --port to select one explicitly.
Rerun warns if --port matches the upstream message proxy port.
Bare --connect targets the upstream message proxy at rerun+http://127.0.0.1:9876/proxy; use --connect 4321 to select another port.
Previously, --connect did not start a Viewer server, and --connect --port 4321 selected the upstream message proxy port.