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- Add GET /api/reports/summary — KPI cards (revenue, appointments, clients) - Add GET /api/reports/revenue — revenue by day/week/month and by groomer - Add GET /api/reports/appointments — appointment trends with status breakdown - Add GET /api/reports/services — service popularity and revenue by service - Add GET /api/reports/clients — new clients, active count, churn risk list - Add GET /api/reports/export.csv — CSV export for revenue, appointments, services - Add Reports page at /reports with date range picker and group-by control - Wire Reports into nav and routing in App.tsx Co-Authored-By: Paperclip <noreply@paperclip.ing>