refactor: compose UI shell with explicit application operations and component owners

scripts/qa-scene-controls.mjs

@@ -208,6 +208,11 @@ try {
         !window.__godsEyeView.styleManager.getControlState().recording,
     ),
   );
+  // Escape can also collapse the Scene accordion. Reopen it through its
+  // installed disclosure before testing the next visible user action.
+  if (await page.$eval('#scene-panel', (panel) => panel.classList.contains('collapsed')))
+    await page.click('[data-collapse-target="scene-panel"]');
+  await page.waitForSelector('#scene-download-btn', { visible: true });
   await page.click('#scene-download-btn');
   const metadata = await page.evaluate(async () =>
     JSON.parse(await window.__sceneExports.at(-1)),