下载操作无法下载文件

#### 描述问题：

下载操作无法下载文件
#### 截图或视频：

可以的话，尽可能提供截图或视频来补充描述你的问题...

#### 如何复现（请务必完整填写下面内容）：

1. 你是如何使用 amis 的？
npm

2. amis 版本是什么？请先在最新 beta 版本测试问题是否存在
"amis": "^6.9.0",

3. 粘贴有问题的完整 `amis schema` 代码：
```
{
"type": "action",
"label": "下载",
"id": "u:ed27e9197d7b",
"actionType": "download",
"api": {
"url": "/test/download",
"method": "get",
"requestAdaptor": "",
"adaptor": "",
"messages": {},
"responseType": "blob"
}
}
```

4. 操作步骤
配置了行为按钮是下载行为,点击后无法下载文件

Reproduce the issue with the provided amis action schema on amis 6.9.0 and inspect the download action request to `/test/download`, including its `responseType: "blob"` setting. Confirm whether the configured action can download the returned file, and document the server response or browser behavior when it cannot.

Written by the indexing model from the issue text.