Show server response in main window for debugging purpose.

lib/chessapp/chess_app.dart

@@ -1,8 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:mchess/chess_bloc/chess_bloc.dart';
+import 'package:mchess/connection/ws_connection.dart';
 
-import 'chess_board.dart';
+import 'package:mchess/chessapp/chess_board.dart';
 
 class ChessApp extends StatelessWidget {
   const ChessApp({super.key});
@@ -25,7 +26,9 @@ class ChessApp extends StatelessWidget {
             ),
           ),
           child: Center(
-            child: FittedBox(
+              child: Column(
+            children: [
+              FittedBox(
                 fit: BoxFit.contain,
                 child: Container(
                   margin: const EdgeInsets.all(20),
@@ -37,12 +40,22 @@ class ChessApp extends StatelessWidget {
                           bState: state,
                         );
                       },
+                    ),
+                  ),
+                ),
+              ),
+              StreamBuilder(
+                stream: ServerConnection.getInstance().channel.stream,
+                builder: (context, snapshot) {
+                  return Text(
+                      style: const TextStyle(color: Colors.white),
+                      snapshot.data.toString());
+                },
+              )
+            ],
           )),
         ),
       ),
-          ),
-        ),
-      ),
     );
   }
 }

lib/chessapp/chess_square.dart

@@ -17,8 +17,7 @@ class ChessSquare extends StatelessWidget {
   const ChessSquare._(
       {required this.coordinate,
       required this.containedPiece,
-      required this.color,
+      required this.color});
-      super.key});
 
   factory ChessSquare(ChessCoordinate coord, ChessPiece? piece) {
     Color lightSquares = Colors.brown.shade50;