fix(aihr): label model config demo fallback

frontend/src/views/system/model/index.vue

@@ -12,6 +12,15 @@
       </div>
     </section>
 
+    <el-alert
+      v-if="modelDataFallback"
+      class="demo-data-alert"
+      title="模型配置接口暂不可用，当前显示内置默认清单，不代表真实租户配置"
+      type="warning"
+      :closable="false"
+      show-icon
+    />
+
     <section class="model-layout">
       <aside class="panel provider-panel">
         <div class="panel-title">
@@ -509,6 +518,7 @@ const modelRows = ref<ModelConfig[]>(seedModels);
 const selectedProviderCode = ref('deepseek');
 const keyword = ref('');
 const loading = ref(false);
+const modelDataFallback = ref(false);
 const testing = ref(false);
 const saving = ref(false);
 const promptLoading = ref(false);
@@ -619,15 +629,18 @@ const normalizeModels = (items: ModelConfig[]): ModelConfig[] => {
 
 const loadData = async (preferredProviderCode = selectedProviderCode.value) => {
   loading.value = true;
+  modelDataFallback.value = false;
   try {
     const [providerResult, configResult] = await Promise.all([getModelProviders(), getModelConfigs()]);
     providers.value = normalizeProviders(providerResult.data ?? []);
     modelRows.value = normalizeModels(configResult.data ?? []);
+    modelDataFallback.value = false;
     selectedProviderCode.value =
       providers.value.find((item) => item.providerCode === preferredProviderCode)?.providerCode ?? providers.value[0]?.providerCode ?? 'deepseek';
   } catch {
     providers.value = seedProviders;
     modelRows.value = seedModels;
+    modelDataFallback.value = true;
     selectedProviderCode.value = preferredProviderCode || 'deepseek';
     ElMessage.warning('模型配置 API 不可用，已展示内置默认清单');
   } finally {