fix(provider): split partial model fetch warnings from errors

frontend/src/features/providers/components/KeyAllowedModelsEditDialog.vue

@@ -691,8 +691,8 @@ async function fetchUpstreamModels(forceRefresh = false) {
       // 获取上游模型后，从自定义模型列表中移除已变成已知的模型
       const upstreamIds = new Set(result.models.map((m: UpstreamModel) => m.id))
       allCustomModels.value = allCustomModels.value.filter(m => !upstreamIds.has(m))
-      if (result.error) {
-        showWarning(result.error, '部分格式获取失败')
+      if (result.warning) {
+        showWarning(result.warning, '部分格式获取失败')
       }
     } else if (result.error) {
       showError(result.error, '获取上游模型失败')