fix: demolish did not return blocks

src/lib/sim/Simulation.cpp

@@ -447,6 +447,11 @@ EntityId Simulation::tryPlaceBuilding(BuildingType type, QPoint anchor, Rotation
     return m_buildingSystem->place(type, anchor, rotation, m_currentTick);
 }
 
+void Simulation::demolish(EntityId id)
+{
+    m_buildingBlocksStock += m_buildingSystem->demolish(id);
+}
+
 BuildingSystem& Simulation::buildings()
 {
     return *m_buildingSystem;

src/lib/sim/Simulation.h

@@ -55,6 +55,9 @@ public:
     // Returns the new entity id, or kInvalidEntityId if blocks are insufficient.
     EntityId tryPlaceBuilding(BuildingType type, QPoint anchor, Rotation rotation);
 
+    // Demolishes the building with the given id and refunds building blocks.
+    void demolish(EntityId id);
+
     BuildingSystem&       buildings();
     const BuildingSystem& buildings() const;
     BeltSystem&           belts();

src/ui/GameWorldView.cpp

@@ -958,7 +958,7 @@ void GameWorldView::mousePressEvent(QMouseEvent* event)
                 || b->type == BuildingType::PlayerDefenceStation);
             if (!protected_)
             {
-                m_sim->buildings().demolish(hovered);
+                m_sim->demolish(hovered);
                 m_demolishHoverId = kInvalidEntityId;
             }
         }