🐛[BUG]

### 🐛 描述(Description)
在已加速页面鼠标放在红蓝色条上上行下行显示错误

### 📷 复现步骤(Steps to Reproduce)

1. 开始加速
2. 鼠标放在红蓝条上
3. 上行下行显示的是两个方框

### 📄 日志信息(Log Information)
好像没有当天的日志

### 🚑 基本信息(Basic Information)

- 程序版本(Program Version):2.8.5
- 系统版本号(OS Version): Windows11
- 是否为应用商店版本(Whether it is a Store version): Yes

### 🖼 截图(Screenshots)

Start by reproducing the issue on Windows 11 with the Microsoft Store version 2.8.5: begin acceleration and hover over the red-blue bar on the accelerated page. Check how the upload and download labels are rendered and identify why they appear as boxes; done means the two directions display correctly. No source file, test, or log is identified in the report.

Written by the indexing model from the issue text.