feat: deployable design studio and updated component showcase

app/pages/accessibility.wrn

@@ -11,7 +11,7 @@ page AccessibilityGuide {
       <section class="guide-section"><h2>Overview</h2><p>Keyboard interaction, visible focus states, labels, and reduced-motion support ship by default.</p></section><section class="guide-section"><h2>Configuration</h2><p>Use the design switcher in the header to test this setting live.</p></section><section class="guide-section"><h2>Component behavior</h2><p>The setting is inherited by components, blocks, templates, and playground previews.</p></section>
       <section class="guide-section"><h2>Label controls and explain errors</h2><p>Give every control a visible label. Use helperText for instructions and error for actionable feedback. Test Tab, Shift+Tab, Enter and Escape; focus must remain visible and follow the reading order.</p><pre><code>&lt;Input label="Email address" type="email" name="email" required="true" helperText="Use your work email." error="Enter a valid email address." /&gt;
 &lt;Button label="Save changes" disabled="true" /&gt;</code></pre><h3>Verify the result</h3><p>Open the matching component page, change its options, and try the keyboard controls. Copy the demonstrated configuration into your page, then replace sample content with your data.</p></section>
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       <nav class="guide-next"><a href="/components/button">Explore components <span aria-hidden="true">→</span></a><a href="/block-library">Browse blocks <span aria-hidden="true">→</span></a></nav>
     </article>
   }