fix(admin): close hero/banner config chain in page-display IA

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.

assets/admin/src/schema/sections/page-display/index.js

@@ -589,7 +589,7 @@ export const pageDisplaySchemas = {
     key: 'page_display.header-components',
     title: '顶部多功能组件',
     icon: 'fas fa-th',
-    description: '顶部轮播、图标卡片、搜索条、公告条等组件配置。',
+    description: '配置顶部组件的显示范围、设备规则、轮播参数、搜索覆盖层与图标卡片。幻灯片图片/文案内容请到「Hero 轮播」「Banner 轮播」管理。',
     defaults: {
       header_components_search_enabled: true,
       header_components_cards_enabled: false,