add live ship stats panel

src/balancing/ArenaView.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <optional>
 #include <random>
 #include <vector>
 
@@ -11,6 +12,7 @@
 #include "FireEvent.h"
 
 #include "entt/entity/entity.hpp"
+#include "EntitySelectedEvent.h"
 #include "Tick.h"
 #include "TickDriver.h"
 #include "VisualsConfig.h"
@@ -37,6 +39,7 @@ signals:
 
 protected:
     void paintGL() override;
+    void mousePressEvent(QMouseEvent* event) override;
 
 private slots:
     void onFrame();
@@ -55,6 +58,7 @@ private:
     QRectF tileRect(QPoint tile) const;
 
     std::optional<QVector2D> entityPosition(entt::entity entity) const;
+    QVector2D widgetToWorld(QPoint widgetPt) const;
 
     struct ActiveBeam
     {
@@ -79,4 +83,6 @@ private:
 
     std::vector<ActiveBeam> m_activeBeams;
     bool m_finishedEmitted;
+
+    std::optional<entt::entity> m_selectedEntity;
 };