feat: 重构棋盘逻辑和游戏流程,将引擎版本提升至4.3

- 重构了 VirtualBoard 类，优化了棋盘操作和事件处理
- 重写了 ChessPiece 类，增加了事件处理和虚拟棋子逻辑
- 更新了 ChessGame 控制器，增加了结束回合功能和对话框
- 调整了场景布局和资源引用
- 清理了冗余代码和注释

Scripts/Controllers/ChessGame.cs

@@ -5,7 +5,10 @@ public partial class ChessGame : Node2D
 {
 	ChessBoard board;
 	Global global;
+	ConfirmationDialog dialog;
 	private bool isSession = false;
+	private Vector2 from;
+	private Vector2 to;
 
 	// Called when the node enters the scene tree for the first time.
 	public override void _Ready()
@@ -13,11 +16,17 @@ public partial class ChessGame : Node2D
 		// Init.Call();
 		global = GetNode<Global>("/root/Global");
 		board = GetNode<ChessBoard>("Chessboard");
-		// GetNode<Button>("Undo").Connect("pressed", Callable.From(board.Undo));
-		// GetNode<Button>("ReInit").Connect("pressed", Callable.From(board.ReInit));
-		// GetNode<Button>("Home").Connect("pressed", Callable.From(this.GoHome));
+        dialog = new ConfirmationDialog {
+            DialogAutowrap = true,
+            MinSize = new Vector2I(400, 200),
+			Position = new Vector2I(200, 400),
+        };
+		AddChild(dialog);
+        // GetNode<Button>("Undo").Connect("pressed", Callable.From(board.Undo));
+        // GetNode<Button>("ReInit").Connect("pressed", Callable.From(board.ReInit));
+        // GetNode<Button>("Home").Connect("pressed", Callable.From(this.GoHome));
 
-		if (!global.RPClient.GetIsConnected()) {
+        if (!global.RPClient.GetIsConnected()) {
 			return;
 		}
 
@@ -28,6 +37,11 @@ public partial class ChessGame : Node2D
 		};
 		board.Set("Hello", Callable.From(() => {GD.PrintErr("hello");}));
 		board.Set("chessMoveFunc", Callable.From((Vector2 newPos, Vector2 fromPos) => {
+			if (from.X == fromPos.X && from.Y == fromPos.Y && to.X == newPos.X && to.Y == newPos.Y) {
+				return true;
+			}
+			from = fromPos;
+			to = newPos;
 			var res = global.RPClient.SendSessionToAll(global.sessionId, new Dictionary{
 					{"type", "move"},
 					{"from", fromPos},
@@ -50,25 +64,58 @@ public partial class ChessGame : Node2D
 	}
 
 	private void SessionMsgHandle(Dictionary msg) {
-		// GD.PrintErr($"session msg: {msg}");
+		GD.PrintErr($"session msg: {msg}");
 		switch (msg["type"].AsString()) {
+			case "over":
+				if (global.RPClient.GetUserId() == msg["id"].AsString()) {
+					break;
+				}
+				dialog.Title = "Opponent Finished";
+				dialog.DialogText = "Turn On You\n";
+				dialog.Visible = true;
+				break;
 			case "move":
-				Vector2 to = new(GD.StrToVar(msg["toX"].ToString()).AsInt32(),
+				Vector2 _to = new(GD.StrToVar(msg["toX"].ToString()).AsInt32(),
 					GD.StrToVar(msg["toY"].ToString()).AsInt32());
 
-				Vector2 from = new(GD.StrToVar(msg["fromX"].ToString()).AsInt32(),
+				Vector2 _from = new(GD.StrToVar(msg["fromX"].ToString()).AsInt32(),
 					GD.StrToVar(msg["fromY"].ToString()).AsInt32());
-				board.MoveAndRecord(to, from);
+				if (_to.X == to.X && _to.Y == to.Y && _from.X == from.X && _from.Y == from.Y) {
+					return;
+				}
+				to = _to;
+				from = _from;
+				board.playerSelf.MoveAndRecord(to, from);
 				break;
 			case "undo":
-				board.Undo();
+				_Undo();
 				break;
 			case "reInit":
-				board.ReInit();
+			 	_ReInit();
 				break;
 		}
 	}
 
+	private void _Undo() {
+		board.playerSelf.Undo();
+	}
+
+	private void _ReInit() {
+		board.playerSelf.ReInit();
+		board.InitChessBoard();
+	}
+
+	private void BtnOver() {
+		GD.PrintErr($"BtnOver {isSession}");
+		if (isSession == false) {
+			return;
+		}
+		global.RPClient.SendSessionToAll(global.sessionId, new Dictionary{
+			{"type", "over"},
+			{"id", global.RPClient.GetUserId()},
+		});
+	}
+
 	public void GoHome() {
 		if (global.RPClient.IsOnline()) {
 			global.RPClient.ExitServer();
@@ -79,9 +126,7 @@ public partial class ChessGame : Node2D
 	public void Undo() {
 		GD.PrintErr($"Undo {isSession}");
 		if (isSession == false) {
-			GD.PrintErr($"Undo ??");
-			board.Undo();
-			return;
+			_Undo();
 		}
 		global.RPClient.SendSessionToAll(global.sessionId, new Dictionary{
 			{"type", "undo"},
@@ -91,8 +136,7 @@ public partial class ChessGame : Node2D
 	public void ReInit() {
 		GD.PrintErr($"ReInit {isSession}");
 		if (isSession == false) {
-			board.ReInit();
-			return;
+			_ReInit();
 		}
 		global.RPClient.SendSessionToAll(global.sessionId, new Dictionary{
 			{"type", "reInit"},