fix(admin): unify sidebar collapse motion

src/App.vue

@@ -1,9 +1,14 @@
 <script setup lang="ts">
+import { computed } from 'vue'
 import { NConfigProvider, NDialogProvider, NGlobalStyle, NMessageProvider, NNotificationProvider } from 'naive-ui'
+import { useRoute } from 'vue-router'
 import AppHeader from '@/components/layout/AppHeader.vue'
 import { openCloudThemeOverrides } from '@/lib/theme'
 import { Analytics } from "@vercel/analytics/vue"
 import { SpeedInsights } from "@vercel/speed-insights/vue"
+
+const route = useRoute()
+const showAppHeader = computed(() => route.name !== 'admin')
 </script>
 
 <template>
@@ -13,7 +18,7 @@ import { SpeedInsights } from "@vercel/speed-insights/vue"
       <NNotificationProvider>
         <NMessageProvider>
           <div class="oc-app-shell">
-            <AppHeader />
+            <AppHeader v-if="showAppHeader" />
             <main class="relative flex-1">
               <div class="oc-app-grid"></div>
               <div class="relative">