Remove API note callout

ui/api.html

@@ -82,16 +82,6 @@
         </article>
       </section>
 
-      <section class="floating-panel api-note">
-        <div class="section-heading compact">
-          <p class="eyebrow">Important</p>
-          <h2>UI is optional, API is mandatory</h2>
-        </div>
-        <p>
-          The hackathon checks the API and baseline script, not this page. This UI exists so reviewers can
-          quickly understand and manually test the same OpenEnv flow from the browser.
-        </p>
-      </section>
     </main>
   </div>
   <script src="/assets/app.js?v=4" defer></script>

ui/assets/styles.css

@@ -773,8 +773,7 @@ main {
   letter-spacing: -0.05em;
 }
 
-.api-health-card p,
-.api-note p {
+.api-health-card p {
   color: var(--muted);
   line-height: 1.7;
 }