bug: 在下载选择文件夹的时候会有点卡

### Preflight checklist

- [x] I searched [existing issues](https://github.com/ja7ad/hydra/issues?q=is%3Aissue) and this is not a duplicate.
- [x] I reproduced this on the latest HYDRA release (or the current `main`).
- [x] This is not a security vulnerability.

### Component

CLI (`hydra`)

### HYDRA version

Hydra 0.5.2

### Operating system

Windows (x86_64)

### OS version / distribution

Windows 11

### How did you install HYDRA?

Homebrew (formula or cask)

### What happened?

### What did you expect to happen?

这个能修复吗

### Steps to reproduce

1.
2.
3.

### Logs / terminal output

```text

```

### Transfer details (for download / engine issues)

- Protocol (HTTP, HTTPS, FTP):
- Server supports range requests (`Accept-Ranges: bytes`):
- Number of connections (`-n`) and mirror sources:
- Proxy in the path (HTTP CONNECT, SOCKS4/4a/5), if any:
- File size and destination filesystem (e.g. 4 GiB onto exFAT):

### Did this work in an earlier version?

_No response_

### Contribution

- [ ] I'm willing to open a pull request for this bug.

Start by reproducing the lag in the hydra CLI on Windows 11 while choosing a download folder. Trace the folder-selection entry point and compare the interaction before and after the change; done means selecting a folder no longer noticeably freezes or stutters.

Written by the indexing model from the issue text.