fix: wire hub-section visibility

bench-app.js

@@ -136,7 +136,8 @@ function renderHeader() {
     `Model budget: ~${budgetGB} GB · ${pieces.join(' · ') || 'using default'} · source: ${b.source}`;
 
   $('output-actions-local').hidden = state.mode !== 'local';
-  $('output-actions-hosted').hidden = state.mode !== 'hosted';
+  const hubSection = $('hub-section');
+  if (hubSection) hubSection.hidden = state.mode !== 'hosted';
   const purgeBtn = $('btn-purge');
   if (purgeBtn) purgeBtn.hidden = state.mode !== 'hosted';
   renderHfSection();