Add registration validation and more activities#2

Merged

mlohvinenko merged 3 commits intomainfrom

accelerate-with-copilot

Sep 25, 2025

Commits on Sep 25, 2025

Add extracurricular activities and signup validation to the API
mlohvinenko
committed
Add participants list display and styling to activity cards
mlohvinenko
committed
Implement MongoDB integration for activities management and add participant removal functionality
mlohvinenko
committed