xhs favorites API error

### Version

0.6.4

### Operating System

macOS

### What happened?

`xhs favorites` returns API error: {"code": -1, "success": false}

### Expected behavior

return user favorites/bookmark posts

### Steps to reproduce

```bash
1. run `xhs login`
2. run `xhs favorites`
```

### Error output / logs

```text

```

Start at the `xhs favorites` command and trace the API request made after `xhs login`; reproduce the failure on macOS with version 0.6.4. Done means the command returns the user's favorite or bookmarked posts instead of the reported API error.

Written by the indexing model from the issue text.