Project: jotai
Task (challenging): Write a Gomoku chess game in route: '/game'
1) Add a button with the text '🎮' in Header, when clicked, jump to new page '/game'
2) chess board is 15*15, there is black chess and white chess, black chess first 
3) Add the className for important element: white chess(.chess-white), black chess(.chess-black), position chess can be clicked to drop follow regex: .chess-pos-\\d{1,2}-d\\{1,2}. 
4) show 'White's Turn' and 'Black'Turn' to shw current player 
5) show 'White Wins!' and 'Black Wins!'.
6) Create gameStateAtom and related atoms to manage the game logic. Beautify this game.
Constraint: DO NOT use any third-party packages; ONLY React/Jotai APIs are permitted.