When a day is closed, re-closed, or reopened, DayService now
recomputes worked_ms and delta_ms on the closed week containing
that day (if the week is already closed). This prevents stale
delta values after editing entries and re-closing a day.
- DayService.recomputeWeek: sums worked_ms from all closed_days
in the week, updates closed_weeks row preserving expected_ms
- NewDayService now takes ClosedWeekStore
- WeekKeyForDayKey exported helper (used by DayService)
- TestWeekSnapshotUpdatesWhenDayReopened regression test
Previously any past workday without a closed_days record blocked week
close. Now only days that actually have entries require an explicit
close. Empty workdays count as 0h worked, which is reflected in the
weekly delta automatically.
- WeekService.CloseWeek: after finding no closed_days record, check
whether the day has any entries; only error if it does
- NewWeekService: takes EntryStore to support the above check
- Updated TestCloseWeekMissingDayFails to reflect the new semantic
(test now creates entries on Friday but leaves it unclosed)
