feat(site-builder): form blocks default to palette tokens

Refs #44

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

craft/src/components/forms/FormButton.toHtml.test.ts

@@ -38,3 +38,11 @@ describe('FormButton.craft.props includes animation/visibility defaults', () =>
     });
   });
 });
+
+describe('FormButton.toHtml palette token default (Refs #44)', () => {
+  test('a new form button (craft default props) paints the primary token', () => {
+    const { html } = toHtml({ ...(FormButton as any).craft.props }, '');
+    expect(html).toContain('background-color:var(--wsb-primary)');
+    expect(html).not.toContain('#3b82f6');
+  });
+});