Greg abb3f47a57 feat: add admin page for date and player management
- Add active flag to Player model with idempotent ALTER TABLE migration
- Filter inactive players from main attendance table and API
- New /admin page with date generation (preview + bulk add) and player management (add/deactivate/reactivate)
- New API endpoints: GET/POST /api/players, PATCH /api/players/<id>
- Add Admin nav link on main page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-08 12:55:41 +01:00
..