Merge worktree-agent: add struct literals, generics, print/log builtins

crates/el-test/src/eval.rs

@@ -307,6 +307,14 @@ impl<'g> Evaluator<'g> {
                 Ok(EvalValue::Nil)
             }
 
+            Expr::StructLit { type_name: _, fields, .. } => {
+                // Evaluate all fields but return Nil — struct construction in test
+                // eval context is not supported yet (tests use activate, not literals)
+                for (_, e) in fields {
+                    self.eval_expr(e)?;
+                }
+                Ok(EvalValue::Nil)
+            }
             // New expression kinds — return Nil
             _ => {
                 Ok(EvalValue::Nil)