A correction dated in the future (within the current period) was being
added to the balance immediately, while the corresponding expected hours
were not yet counted (elapsed working days only go up to today).
Fix: in the ongoing-period branch, sum only corrections whose date is
<= today, matching the same window used for elapsed working days and
tracked time.
- Add PeriodType enum and working_days column to ClientTarget schema
- Rename weekly_hours -> target_hours; remove Monday-only constraint
- Add migration 20260224000000_client_targets_v2
- Rewrite computeBalance() to support weekly/monthly periods, per-spec
pro-ration for first period, ongoing vs completed period logic, and
elapsed working-day counting (§4–§6 of requirements doc)
- Update Zod schemas and TypeScript input types for new fields
- Frontend: replace WeekBalance with PeriodBalance; update
ClientTargetWithBalance to currentPeriod* fields
- ClientTargetPanel: period type radio, working-day toggles, free date
picker, dynamic hours label
- DashboardPage: rename widget to Targets, dynamic This week/This month
label
