- Introduce the ResearchManager to manage tech trees, node unlocking, and passive effects, enhancing gameplay depth.
- Update GameStateManager to integrate the ResearchManager, ensuring seamless data handling for research states.
- Implement lazy loading for mission definitions and class data to improve performance and resource management.
- Enhance UI components, including the ResearchScreen and MissionBoard, to support new research features and mission prerequisites.
- Add comprehensive tests for the ResearchManager and related UI components to validate functionality and integration within the game architecture.
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