HubCapabilitiesCard wires HubClient.listCapabilities() into the
hub-status page below the connection form: once the app starts
in hub mode and the connection is healthy, the card shows
capability@version, the providing module, and its kind for
every entry the hub reports.
In mock mode the card prints an explanatory hint instead of
loading, so no confusing empty-state appears when the user is
just browsing the demo data.
A small refresh-icon next to the heading lets the user re-poll
without a full page reload — useful right after a chain install
in another terminal.
Signed-off-by: flemming-it <sf@flemming.it>
