- Introduced `observation-metadata.ts` to define valid observation types and concepts, along with their corresponding emoji mappings.
- Updated `context-hook.ts` to utilize new constants for observation types and concepts, enhancing maintainability.
- Refactored `worker-service.ts` to validate observation types and concepts against the new centralized constants.
- Consolidated settings management in `Sidebar.tsx` to streamline state handling for context settings.
- Improved error handling and logging for context loading failures.