fix(frontend): test selected model provider only

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

@@ -571,11 +571,10 @@ const filteredProviders = computed(() => {
 const activeProvider = computed<ProviderView>(
   () => providers.value.find((item) => item.providerCode === selectedProviderCode.value) ?? providers.value[0] ?? seedProviders[0]
 );
-const activeChatModel = computed(
-  () =>
-    modelRows.value.find((item) => item.category === 'chat' && item.enabled && item.configured) ??
-    modelRows.value.find((item) => item.category === 'chat' && item.enabled) ??
-    modelRows.value[0]
+const activeChatModel = computed(() =>
+  modelRows.value.find(
+    (item) => item.id > 0 && item.providerCode === selectedProviderCode.value && item.category === 'chat' && item.enabled && item.configured
+  )
 );
 const keyText = computed(() => {
   if (!activeProvider.value.configured) return '未配置';
@@ -681,6 +680,10 @@ const runVectorRebuild = async () => {
 };
 
 const runConnectionTest = async () => {
+  if (!activeChatModel.value) {
+    ElMessage.warning('请先为当前供应商配置并启用 chat 模型');
+    return;
+  }
   testing.value = true;
   try {
     const result = await testModelChat({