Revert make-raw-html wrapping from eval.sx spec

The make-raw-html wrapper in eval-list was host-specific: it fixed
server-side HTML escaping but broke the client DOM adapter (render-expr
returns DOM nodes, not strings). The raw-html wrapping belongs in the
host (async_eval_ref.py line 94-101), not the spec.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/sx/ref/eval.sx

@@ -173,11 +173,8 @@
                   (make-thunk (expand-macro mac args env) env))
 
               ;; Render expression — delegate to active adapter.
-              ;; Wrap in raw-html so the result keeps its type when
-              ;; used as a value in eval position (e.g. bound to a
-              ;; component keyword arg then rendered later).
               (is-render-expr? expr)
-                (make-raw-html (render-expr expr env))
+                (render-expr expr env)
 
               ;; Fall through to function call
               :else (eval-call head args env)))