site 1.4.5: builder folds the mod list away while Stock firmware is on

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

builder/ui.js

@@ -35,6 +35,7 @@
       MODS.forEach(function (m) { chosen[m.id] = before[m.id]; });
     }
     byId('stock').setAttribute('aria-pressed', on ? 'true' : 'false');
+    byId('picks').classList.toggle('collapsed', on);    // stock: the mods folded away
     byId('pick-note').textContent = on ? 'Stock: the update will have no mods.' : '';
     render();
   }