Restructure to Figma: 4 stat cards (today appts, today/week payments,
total patients) -> two charts (revenue area + patient-count vertical
bars) -> today appointments table. Add today/week payments, total
patients, and 7-day revenue/appointments series to doctor + clinic
dashboard endpoints. Add SvgVBars chart. Update dashboard.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>