feat(SPA): schema list and the sidebar Content group

web/src/components/DirectoryLoadError.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { t } from '@/i18n'
 
-defineProps<{ title: string }>()
+defineProps<{ title: string; description?: string }>()
 
 defineEmits<{ retry: [] }>()
 </script>
@@ -15,7 +15,7 @@ defineEmits<{ retry: [] }>()
 		:close="false"
 		icon="i-lucide-circle-x"
 		:title="title"
-		:description="t('Check your connection and try again.')"
+		:description="description ?? t('Check your connection and try again.')"
 		:ui="{ actions: 'mt-2' }"
 	>
 		<template #actions>