Project: mobx
Task (challenging): Enhance the Gomoku game with multi-step undo functionality.
1) Implement keyboard shortcut (Ctrl+Z on Windows/Linux or Command+Z on Mac) to trigger the undo action.
2) Allow multiple consecutive undos to revert the game state to any previous point.
3) Add a move history display with className '.move-history' showing all moves in the format "White: (x,y)" or "Black: (x,y)".
4) Each history item should have className '.history-item'.
Constraint: DO NOT use any third-party packages; ONLY React/MobX APIs are permitted; Use MobX to manage the logic;