feat: improve page component (#5013)

* feat: `page` component support fixed header

* docs: `page`  component documentation

* docs: Improve `props` types of `page`

* docs: improve `fixedHeader` description of `page`

* fix: `page` header border color with fixedHeader

* feat: add `headerClass` for `Page`

docs/.vitepress/config/zh.mts

@@ -148,6 +148,16 @@ function sidebarComponents(): DefaultTheme.SidebarItem[] {
         },
       ],
     },
+    {
+      collapsed: false,
+      text: '布局组件',
+      items: [
+        {
+          link: 'layout-ui/page',
+          text: 'Page 页面',
+        },
+      ],
+    },
     {
       collapsed: false,
       text: '通用组件',