fix: restore missing site information (#19)

Author: WRXinYue

theme/components/core/ValaxyApp.vue

@@ -1,10 +1,24 @@
 <script setup lang="ts">
+/**
+ * Synchronized with:
+ * https://github.com/YunYouJun/valaxy/blob/main/packages/valaxy/client/components/ValaxyApp.vue
+ */
+
+import { useLayout, useValaxyApp } from 'valaxy'
 // @ts-expect-error virtual module
 import ValaxyUserApp from '/@valaxyjs/UserAppVue'
+
+const layout = useLayout()
+
+if (layout.value !== 'empty') {
+  useValaxyApp()
+}
 </script>
 
 <template>
-  <ValaxyThemeApp />
-  <ValaxyAddons />
-  <ValaxyUserApp />
+  <template v-if="layout !== 'empty'">
+    <ValaxyThemeApp />
+    <ValaxyAddons />
+    <ValaxyUserApp />
+  </template>
 </template>