The Plugins page declares three slots as children of its main entry:
`plugins.item` lists an official plugin's page in the Official group,
`plugins.bundle.config` renders a bundle's own form on its page, and
`plugins.row.config` gives a row a configure control opening the row's
page. Every entry renders in the `summary` and `page` views the page
passes as owner props; the page draws the title, icon, and crumb and
projects the ledgers beside its store, naming no configurable plugin.
`ui-settings-plugins` registers its four host-plane pages into
`plugins.item` while the Host serves their namespaces and withdraws them
when it stops; the forms keep edits until a save and drop them on leaving
the page, so the discard control and the unsaved marker are gone. The
Settings section becomes the Built-in plugins shell around the inventory
tab, and `settings.plugin.item` is retired.
The Official group opens with the optional bundles the installation
ships, tagged Beta where the feature is one and without an official tag,
followed by the configuration pages. Auto review leaves the optional
bundles and the CLI's dependencies; the install guide names it as its
example spec. The version tag is a capsule like the other tags.
The `plugin-config` web lane drives the pages through the real wire and
opens a community fixture's row page after switching its bundle on; the
settings lanes re-record the renamed navigation entry.
Dudu-0223