Connect header_components_show_on through aksrt_header_slide_is_show with
zibll page-type matching, drop the homepage-only gate, align admin options,
apply nav color, enqueue by is_show, remove dead float-btn schema, and
consume footer_tabbar_single extend mode on post singles.
Wire existing HeroManager/BannerManager into page-display routes and
component loaders, fix banner REST round-trip (show_meta + optional title),
and retarget operator deep-links to the real slide managers.
The page-display homepage menu entry was registered as a SchemaPage for
section "homepage", but PHP's page_display schema has no such section, so
GET /wp-json/aksrt/v1/settings/schema/page_display/homepage returned 404
(未知的设置分组: homepage). Point the route at HomepageSettings, which
already uses /settings/homepage like FooterSettings.
kate522
