Archive three completed changes to archive/: - api-resource-standard (70 tasks, 14 resource classes) - capacity-expert-mode (68 tasks, expert mode planning grid) - enhanced-allocation (62 tasks, planning fidelity + reporting) Sync all delta specs to main specs/: - api-resource-standard: API response standardization - capacity-expert-mode: Expert mode toggle, grid, KPIs, batch API - resource-allocation: Month execution comparison, bulk, untracked - untracked-allocation: Null team member support - allocation-indicators: Variance indicators (red/amber/neutral) - monthly-budget: Explicit project-month planning All changes verified and tested (157 tests passing).
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Decision Log: capacity-expert-mode
2026-02-24 — Timezone & Accessibility Fixes
Issue
User reported that weekend shading in Expert Mode was misaligned (showing on 5th/6th instead of 4th/5th for April 2026). Additionally, the shading was too subtle for colorblind users, and cells were not prefilled with O/H for weekends/holidays.
Root Cause
Browser new Date('YYYY-MM-DD') interprets dates in local timezone, causing dates to shift for users west of UTC. A user in UTC-6 sees 2026-04-04 as 2026-04-03T18:00, which reports as Friday instead of Saturday.
Decisions Made
| # | Decision | Rationale |
|---|---|---|
| D8 | Use Eastern Time (America/New_York) as canonical timezone for weekend/holiday detection | Ensures consistent business-day alignment; future configurable |
| D9 | Use high-contrast styling for weekends/holidays (solid backgrounds + borders) | Accessibility for colorblind users |
| D10 | Prefill weekends with O, holidays with H on grid load |
Matches user expectations; reduces manual entry |
| D11 | Frontend and backend must sync when seeding default values | Prevents divergent behavior on refresh |
Implementation Notes
- Frontend: Parse dates as
new Date(dateStr + 'T00:00:00')to avoid timezone drift - Backend: Use Carbon with
America/New_Yorktimezone - Both sides must implement identical prefill logic
Future Considerations
- Make timezone configurable per-team or per-user (v2)
- Extract prefill rules to shared configuration
Earlier Decisions
See design.md sections D1-D7 for original design decisions.