获取上一周的时间少一天，Get one less day of the previous week

dayjs().subtract(1, 'w').startOf('w').format(TIME_FORMAT)
dayjs().subtract(1, 'w').endOf('w').format(TIME_FORMAT)
获取到的是 周日 到 周六 不是周一到周日
I got Sunday through Saturday, not Monday through Sunday

Start by reproducing the behavior with the two Day.js expressions shown in the issue and inspect how the week boundaries are determined. The work is done when the previous week is consistently represented as Monday through Sunday, with a regression check for the reported case.

Written by the indexing model from the issue text.