feat: add highlighted protocol views and inline operation forms

Expose Rust Text View tokens and safely highlight signatures and JSON results. Add animated Interface and inline Run disclosures with a shared 10ms line cadence, typed argument inputs, and explicit execution.

Update documentation and browser regressions for the new controls and explicit counter-value responses.

site/astro.config.mjs

@@ -17,6 +17,8 @@ export default defineConfig({
   site,
   base,
   trailingSlash: 'always',
+  // Browser tests exercise the site, not the development toolbar overlay.
+  devToolbar: { enabled: process.env.SITE_BROWSER_TEST !== '1' },
   markdown: {
     processor: unified({ remarkPlugins: [[documentLinks, { base }]], smartypants: false }),
     shikiConfig: { themes: { light: 'github-light', dark: 'github-dark' }, langAlias: { wip: 'text' } },