feat(chess): 初始化棋盘和玩家颜色,优化代码结构,重构多人游戏代码

- 在 ChessGame 中初始化棋盘，根据玩家颜色设置棋子
- 更新 UI 显示玩家颜色
- 调整棋盘位置和 UI 布局
- 重构部分代码以提高可读性和维护性

Scripts/Src/ChineseChess/Player.cs

@@ -7,7 +7,7 @@ public class Player {
 	private readonly SelectedPiece selectedNode;
 	private readonly MoveRecords<VirtualPiece> moveRecords;
 	public EventHandler<VirtualBoard.MoveEventArgs> OnMove;
-	public ArrayList pieces = new();
+	
 
 	public enum PlayerType {
 		Human,
@@ -86,11 +86,16 @@ public class Player {
 		// board.InitChessBoard();
 	}
 
+	public void SetAllowedPieces(ArrayList allowedPieces) {
+		selectedNode.allowedPieces = allowedPieces;
+	}
+
 	private class SelectedPiece {
 		// Called when the node enters the scene tree for the first time.
 		private Vector2 selectedNodePos = Vector2.Inf;
 		private VirtualPiece piece;
 		private readonly VirtualBoard board;
+		public ArrayList allowedPieces = null;
 
 		public SelectedPiece(VirtualBoard board) {
 			this.board = board;
@@ -105,8 +110,11 @@ public class Player {
 
 		public void SetPos(Vector2 pos) {
 			// piece = board.GetNodeFromBoard(pos) as VirtualPiece;
+			piece = board.GetPiece(pos);
+			if (allowedPieces != null && allowedPieces.Contains(piece) == false) {
+				return;
+			}
 			selectedNodePos = pos;
-			piece = board.GetPiece(selectedNodePos);
 			piece.Selected(true);
 		}