fix(admin): harden hero/banner round-trip and operator cross-links

Align enabled-meta semantics with frontend, allow truly empty titles on
update, use router navigation for manager deep-links, and document fixed
skeleton ownership in module schema copy.

assets/admin/src/pages/content/HomepageSettings.vue

@@ -184,9 +184,9 @@
                 如需调整首页首屏运营区，请前往对应管理页配置幻灯片内容或顶部组件参数。
               </n-alert>
               <n-space>
-                <n-button tag="a" href="#/page-display/hero" secondary type="primary">管理 Hero 轮播</n-button>
-                <n-button tag="a" href="#/page-display/banner" secondary type="primary">管理 Banner 轮播</n-button>
-                <n-button tag="a" href="#/page-display/header-components" secondary>
+                <n-button secondary type="primary" @click="router.push('/page-display/hero')">管理 Hero 轮播</n-button>
+                <n-button secondary type="primary" @click="router.push('/page-display/banner')">管理 Banner 轮播</n-button>
+                <n-button secondary @click="router.push('/page-display/header-components')">
                   顶部多功能组件
                 </n-button>
               </n-space>
@@ -204,10 +204,12 @@
 
 <script setup>
 import { computed, onMounted, reactive, ref } from 'vue'
+import { useRouter } from 'vue-router'
 import { useMessage } from 'naive-ui'
 import api from '@/api'
 import PageHeader from '@/components/PageHeader.vue'
 
+const router = useRouter()
 const message = useMessage()
 const loading = ref(true)
 const saving = ref(false)