[🐛Bug]: 启动设置中无法选择倒计时

[BlazeWings]

✨ What You Expected

希望能修复bug

❓ What Actually Happened

在启动设置中点击倒计时，下一次查看时发现倒计时并没有设置成功，其他的功能比如正计时是可以的

📝 Steps to Reproduce the Issue

No response

📌 Additional Information

catime 1.4.0更新之后的版本，希望早点修复这个bug，新版的样式非常喜欢

✅ Final Checklist

• ⚡ I've confirmed I'm using the latest version, not an older one.
• 📋 I've checked the FAQ and known issues list to confirm this is a new bug.