- Install Laravel Sanctum, add HasApiTokens to User model
- Register API routes under /api/v1/ prefix in bootstrap/app.php
- Create AppConfigController (public): academy branding, feature flags, auth mode
- Create AuthOtpController: OTP request/verify with demo mode, rate limiting
- Create DeviceController: FCM token register/refresh/delete
- Create ParticipantController: children, show, summary, schedule, attendance, invoices, enrollments
- Create API Resources (User, Participant, Session, Attendance, Invoice, Enrollment)
- Create device_tokens migration with platform CHECK constraint
- Create DeviceToken model with BelongsToAcademy trait
- Add mobile API implementation plan document
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>