feat(h5): 小程序 embed 模式与全站 ICP 备案页脚

H5 支持 ?mp=1 嵌入微信 WebView；user-h5/admin-h5 底部展示蜀ICP备2025140386号-2 并链至工信部；补充小程序+H5 部署说明。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/user-h5/src/App.vue

@@ -1,12 +1,22 @@
 <template>
-  <div class="app-shell">
-    <AppHeader />
+  <div class="app-shell" :class="{ 'mp-embed': mpEmbed }">
+    <AppHeader v-if="!mpEmbed || showEmbedHeader" />
     <router-view />
-    <TabBar />
+    <IcpFooter />
+    <TabBar v-if="!mpEmbed" />
   </div>
 </template>
 
 <script setup lang="ts">
+import { computed } from 'vue'
+import { useRoute } from 'vue-router'
 import AppHeader from './components/AppHeader.vue'
+import IcpFooter from './components/IcpFooter.vue'
 import TabBar from './components/TabBar.vue'
+import { isMpEmbed } from './lib/mpEmbed'
+
+const route = useRoute()
+const mpEmbed = isMpEmbed()
+/** Sub-pages in web-view: show back only; home hides duplicate chrome. */
+const showEmbedHeader = computed(() => mpEmbed && route.path !== '/')
 </script>