- Backend reports: fix cost/profit calculation to handle null unit_cost
with has_gap flag; expose total_cost in product & workday summary
- StaffTab: add hourly_rate field in payroll section (admin-only)
- ProductFormModal: major refactor of form layout and structure
- ProductsTab: minor tweaks aligned with form changes
- Report pages (Today, WorkDaySummary, CategoryPerformance,
ProductPerformance, RevenueTrends): UI improvements and cost data
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
bonamin
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