Introduce the HubScreen as the main interface for managing resources, units, and mission selection, integrating with the GameStateManager for dynamic data binding. Implement the MissionBoard component to display and select available missions, enhancing user interaction with mission details and selection logic. Update the GameStateManager to handle transitions between game states, ensuring a seamless experience for players. Add tests for HubScreen and MissionBoard to validate functionality and integration with the overall game architecture.
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