AST list refactoring

ASTPlayground/MainForm.pas

@@ -157,7 +157,7 @@ uses
 procedure TForm1.FormCreate(Sender: TObject);
 begin
     // 1. Initialize Environment
-    FEnvironment := TAstEnvironment.Construct(TAst.CreateScope(nil));
+    FEnvironment := TAstEnvironment.Construct(TAst.CreateScope(nil, nil, True));
 
     // 2. Initialize AST Editor Component
     // This replaces the manual Workspace + Controller setup.
@@ -918,7 +918,7 @@ begin
         try
             if rootNode.Kind = akBlockExpression then
             begin
-                for var expr in rootNode.AsBlockExpression.Expressions do
+                for var expr in rootNode.AsBlockExpression.Expressions.ToArray do
                 begin
                     if (expr.Kind = akVariableDeclaration) then
                     begin