修复定时器当启动时间在周五时，计算下个周五的bug

tools/checktime.go

@@ -11,7 +11,13 @@ func RemainingTimeUntilNextFriday17() time.Duration {
 	now := time.Now()
 
 	// 计算下一个周五的时间
-	nextFriday := GetNextWeekday(now, time.Friday)
+	nextFriday := now.AddDate(0, 0, (int(time.Friday)-int(now.Weekday())+7)%7)
+
+	// 如果今天是周五，则直接返回距离今天17点的时间
+	if now.Weekday() == time.Friday {
+		today17 := time.Date(now.Year(), now.Month(), now.Day(), 17, 0, 0, 0, now.Location())
+		return today17.Sub(now)
+	}
 
 	// 构造下一个周五 17 点的时间
 	nextFriday17 := time.Date(nextFriday.Year(), nextFriday.Month(), nextFriday.Day(), 17, 0, 0, 0, nextFriday.Location())
@@ -21,13 +27,3 @@ func RemainingTimeUntilNextFriday17() time.Duration {
 
 	return duration
 }
-
-// 获取下一个指定星期几的时间
-
-func GetNextWeekday(t time.Time, weekday time.Weekday) time.Time {
-	daysUntil := (int(weekday) - int(t.Weekday()) + 7) % 7
-	if daysUntil == 0 {
-		daysUntil = 7
-	}
-	return t.AddDate(0, 0, daysUntil)
-}