Visualizer node aggregates

Fix in macro expander

Src/AST/Myc.Ast.Binding.pas

@@ -181,9 +181,11 @@ end;
 
 function TAstBinder.VisitMacroExpansionNode(const Node: IMacroExpansionNode): IAstNode;
 begin
-    // The MacroExpander (Phase 1) should have unwrapped this.
-    // We only visit the *expanded* body.
-    Result := Accept(Node.ExpandedBody);
+    // The MacroExpander (Phase 1) created this node.
+    // We must bind the ExpandedBody, but keep the MacroExpansionNode wrapper.
+    // The base TAstTransformer implementation already does exactly this
+    // by visiting Callee, Arguments, and ExpandedBody.
+    Result := inherited VisitMacroExpansionNode(Node);
 end;
 
 function TAstBinder.VisitFunctionCall(const Node: IFunctionCallNode): IAstNode;