refactor: update Puppet transform logic to support AffineTransform world matrices and improve selection highlighting

src/Math/Assembly.cpp

@@ -21,7 +21,7 @@ namespace uLib {
 
 Assembly::Assembly()
     : ObjectsContext(),
-      AffineTransform(),
+      TRS(),
       m_BBoxMin(Vector3f::Zero()),
       m_BBoxMax(Vector3f::Zero()),
       m_ShowBoundingBox(false),
@@ -31,7 +31,7 @@ Assembly::Assembly()
 
 Assembly::Assembly(const Assembly &copy)
     : ObjectsContext(copy),
-      AffineTransform(copy),
+      TRS(copy),
       m_BBoxMin(copy.m_BBoxMin),
       m_BBoxMax(copy.m_BBoxMax),
       m_ShowBoundingBox(copy.m_ShowBoundingBox),
@@ -55,6 +55,10 @@ void Assembly::AddObject(Object *obj) {
         this->ComputeBoundingBox();
         this->Updated(); // Signal that assembly itself changed (AABB-wise)
     });
+
+    // Parent -> Child propagation for world matrix updates
+    Object::connect(this, &Object::Updated, obj, &Object::Updated);
+
     this->ComputeBoundingBox();
 }