CoachDesk Desktop Demo (Offline)

How to run:
1) Install Python 3.11+
2) Install tkcalendar: pip install tkcalendar
3) Run: python main.py

Demo credentials:
- coach_demo / demo
- athlete_nina / demo
- athlete_peter / demo
- athlete_lucia / demo
- athlete_adam / demo

Limitations:
- Demo only, offline JSON storage
- Adding athletes disabled
- SwimRankings import disabled
- Planning horizon limited to 14 days
