refactor: update Geant scene visualization to use PhysicalVolumes instead of raw Solids for improved placement and context handling.

src/Vtk/HEP/Geant/vtkTessellatedSolid.h

@@ -22,14 +22,14 @@ namespace Vtk {
  */
 class TessellatedSolid : public GeantSolid {
 public:
-  TessellatedSolid(Geant::TessellatedSolid *content);
+  TessellatedSolid(Geant::PhysicalVolume *content);
   virtual ~TessellatedSolid();
 
   virtual void Update() override;
   virtual void UpdateGeometry() override;
 
 protected:
-  Geant::TessellatedSolid *m_TessContent;
+  Geant::TessellatedSolid *m_TessSolid;
 };
 
 } // namespace Vtk