implement load config on game restart

src/ui/MainWindow.h

@@ -1,8 +1,9 @@
 #pragma once
 
+#include <string>
+
 #include <QWidget>
 
-#include "GameConfig.h"
 #include "Tick.h"
 #include "VisualsConfig.h"
 
@@ -18,8 +19,7 @@ class MainWindow : public QWidget
     Q_OBJECT
 
 public:
-    MainWindow(Simulation* sim, const GameConfig* config,
-               const VisualsConfig* visuals, QWidget* parent = nullptr);
+    MainWindow(Simulation* sim, const std::string& configDir, QWidget* parent = nullptr);
 
 protected:
     void resizeEvent(QResizeEvent* event) override;
@@ -32,6 +32,8 @@ private slots:
 private:
     void layoutPanels();
 
+    std::string            m_configDir;
+    VisualsConfig          m_visuals;
     Simulation*            m_sim;
     GameWorldView*         m_gameWorldView;
     HeaderBar*             m_headerBar;