- Introduced `coding_challenges` and `coding_attempts` tables in the database schema.
- Created corresponding SQLAlchemy models for `CodingChallenge` and `CodingAttempt`.
- Implemented service functions for evaluating coding challenges and managing user attempts.
- Added Pydantic schemas for API interactions related to coding missions.
- Updated frontend components to support coding challenges, including a new `CodingMissionPanel` for user interaction.
- Enhanced mission list and detail views to display coding challenge progress.
