- Implemented clean architecture with domain, data, and presentation layers
- Added Expert and Prediction entities with repository pattern
- Created RankingScreen with search, stats, and expert cards
- Designed ExpertDetailScreen with profile and prediction history
- Implemented responsive UI with gradient backgrounds and modern styling
- Added comprehensive unit tests and widget tests (100+ tests)
- Configured Flutter project for iOS and Android platforms

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>