Group built-in settings before optional and installed plugins, and open the full experimental catalog on a separate page.
Preserve detail navigation and unsaved configuration when installation finishes, and use the visible More label as the accessible name.
The Plugins page spec's configuration bodies take the view positionally
as master's fixture does, the companion and section specs read a slot
entry's injected face through a Pick of the members they assert instead
of a double assertion, and the no-unknown-casts baseline drops the
entries retired with the moved settings tests.
Each official settings page now lives in a client package of its own:
`ui-settings-shell`, `ui-settings-agent-loop`, `ui-settings-subagent`
and `ui-settings-web-search` register into `plugins.item` while the Host
serves their namespaces, through the new `settingsScope.whileServed`
watch, each with its own dictionary and styles. The form model, the
fields and the form move to `ui-primitives` as the shared settings kit,
so a community package's browser half builds a page the same way.
`ui-settings-plugins` keeps only the Built-in plugins section shell
around the inventory tab.
The companions hold Loader rows in `web-app` behind the section; the
client catalog, config catalog and module graph regenerate; the
settings-card cookbook walks through a companion package.
Ziya