Marketplace install/upgrade on a factory-served plugin actually created
a permanent override shadowing every future built-in release. The card
now shows an informational "Updates with the system" badge instead of
the action, while keeping the built-in vs marketplace version line and
the upgradable state badge visible. Deliberate overrides are untouched:
upload and marketplace actions on overridden or third-party plugins
behave as before, and the plugins table now hints when an override
lags behind the shipped built-in version so operators know deleting it
restores the newer factory plugin.
