feat(forms): add local Form A presentation preview

www/src/components/pages/ContactPage.astro

@@ -1,6 +1,8 @@
 ---
 import ContactForm from '../ContactForm.astro';
+import FormAPreview from '../FormAPreview.astro';
 import { formMessages } from '../../utils/form-messages';
+import { formAPreviewEnabled, formModeForRuntime, resolveFormMode } from '../../utils/form-integration';
 
 interface Props {
   title: string;
@@ -9,6 +11,8 @@ interface Props {
 
 const { title, lang } = Astro.props;
 const text = formMessages(lang);
+const formConfig = resolveFormMode(import.meta.env.PUBLIC_AIA_FORMS_MODE, import.meta.env.PUBLIC_AIA_FORMS_LIVE_APPROVED);
+const formPreview = formAPreviewEnabled(import.meta.env.PUBLIC_AIA_FORM_A_PREVIEW, import.meta.env.PUBLIC_ALLOW_INDEXING, formModeForRuntime(formConfig));
 ---
 
 <section class="contact-page">
@@ -16,7 +20,7 @@ const text = formMessages(lang);
     <div class="contact-page__copy">
       <slot />
     </div>
-    <ContactForm title={title} lang={lang} />
+    {formPreview ? <FormAPreview lang={lang as 'en' | 'es'} variant="full" submitText={lang === 'es' ? 'Enviar' : 'Submit'} /> : <ContactForm title={title} lang={lang} />}
   </div>
 </section>