1. Financial Overview: add subscription vs product revenue split, top programs
   by revenue, per-product totals, and 12 key financial metrics (churn rate,
   avg revenue per participant, profit margin, avg days to collect, etc.)
   All respect the existing period + branch filters.

2. Attendance views (TakeAttendance + QuickAttendance): detect participants
   with unpaid invoices or overdue renewals and highlight them in red with
   "غير مدفوع" badge so trainers can see payment status at a glance.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>