- Add admin UIs for Video, Trainers, Schedule, and Pricing Plan sections
- Redesign schedule section with interactive day-filter cards and Alpine.js
- Fix video section click handler with Alpine.js reactive state
- Add section reordering (up/down arrows) in SectionManager
- Add SEO meta tags (OG, Twitter Card, canonical, robots) to website layout
- Add site-btn--outline-accent CSS variant for pricing cards
- Add scrollbar-hide utility to website.css
- Fix broken routes: website.preview → website.manage.preview,
  parent.child-detail → parent.profile.child,
  parent.invoice-detail → parent.finances.invoice
- Fix attendance "not_taken" filter to match dashboard logic (include scheduled sessions)
- Add enrollment status breakdown (active/pending/cancelled) to subscription revenue widget
- Add cancelled/suspended revenue explanation in activity breakdown
- Add Phase C migration + events section key migration
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>