- Created draft eligibility calculation logic in `app/lib/draft-eligibility.ts`
- Added interfaces for sport availability and draft eligibility
- Implemented `calculateDraftEligibility` function to determine eligible sports based on team picks and global availability
- Developed `getEligibilitySummary` function for human-readable eligibility status
- Updated API endpoints to validate eligibility before making picks
- Enhanced frontend draft room UI to reflect eligibility status and provide visual indicators for ineligible participants
- Comprehensive implementation summary and testing documentation added
- All changes type-checked and unit tests passed successfully
