[🐛Bug]: 倒计时不应用09:59格式

[J1angyue]

✨ What You Expected

倒计时格式应用09:59格式，只显示小时+分钟

❓ What Actually Happened

倒计时预设中设置了2h25m，格式中选择了09:59格式，倒计时仍显示小时+分钟+秒，期望是只显示小时+分钟

版本：1.4.0

📝 Steps to Reproduce the Issue

1. 倒计时预设中设置2h25m
2. 格式中选择09:59格式
   结果：倒计时仍显示小时+分钟+秒
   期望：只显示小时+分钟

📌 Additional Information

✅ Final Checklist

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