[Bugs] Review PR page scrolls to the top occasionally on Viewed check

**Mood:** 😔
**Category:** Bugs

Ocassionally when I press "viewed" on a file while reviewing a PR - the page jumps on top.
I commonly start reviews from the bottom because it has lower scoped files such as tests, which are easily to mark viewed without looking around several files.
So when it jumps to the top, I have to scroll down again, slightly annoying, but otherwise I am enjoying the review experience (except for inability to add per-line review comments of course).

---
| Field | Value |
| --- | --- |
| App version | 1.0.6 |
| OS | Windows 10.0.26200 |
| Theme | GitHub |
| Path | /mywork |
| Tenure | Week 2 |

从 /mywork review 页面开始，在 Windows 10 上打开一个 pull request，滚动到接近底部的位置，并将一个文件标记为 Viewed，以重现该问题。确认页面保持在相同的滚动位置，而不是跳到顶部；当此行为在 review 期间保持稳定时，问题即完成。

由索引模型根据 Issue 内容生成。