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/admin-h5/src/pages/LoginPage.vue

@@ -2,6 +2,7 @@
 import { ref } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import BrandLogo from '@/components/BrandLogo.vue'
+import IcpFooter from '@/components/IcpFooter.vue'
 import { useAuthStore } from '@/stores/auth'
 
 const auth = useAuthStore()
@@ -46,11 +47,24 @@ async function onSubmit() {
         {{ loading ? '登录中…' : '登录' }}
       </button>
     </form>
+    <IcpFooter />
   </div>
 </template>
 
 <style scoped>
-.wrap { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem; }
+.wrap {
+  min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 1.5rem;
+}
+.wrap :deep(.icp-footer) {
+  margin-top: auto;
+  width: 100%;
+  padding-bottom: 0.25rem;
+}
 .login { width: min(380px, 100%); text-align: center; }
 .login :deep(.field) { text-align: left; }
 h1 { margin: 0 0 0.25rem; font-size: 1.45rem; font-family: "Noto Serif SC", "Songti SC", serif; }