小蜜合作设计规范.sketch下载不了啊

**Version information (版本信息)**
- ChatUI or ChatUI Pro?
- ChatUI Version:
- React Version:
- OS Version:
- Browser Version:

**Describe the bug (描述问题)**

**Steps To Reproduce (重现步骤)**
1.
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**Link to minimal reproduction (最小化重现链接)**

**Expected behavior (期望的结果是什么)**

The issue only reports that the 小蜜合作设计规范 Sketch download fails; the version information, reproduction steps, expected behavior, and reproduction link are empty. Start by gathering the missing environment and download details, then reproduce the failure and identify the affected design asset or delivery path. Done means the Sketch file downloads successfully with documented reproduction steps.

Written by the indexing model from the issue text.