test: keep weather teardown browser actively rendering

changelog.d/1275-forecast-issue-fix.md

@@ -1,2 +1,3 @@
 - Preserve enable during first-load replacement (asturksever, #1275).
 - Release disabled weather camera listeners and make teardown resource leaks fail the browser probe (asturksever, #1275).
+- Keep visible-page weather teardown probes focused through the browser testing API (asturksever, #1275).

scripts/qa-weather-teardown.mjs

@@ -61,6 +61,10 @@ const browser = await puppeteer.launch({
 
 const boot = async () => {
   const page = await browser.newPage();
+  // This probe measures active rendering; an OS-minimized window must not
+  // silently exercise the application's intentional hidden-page pause.
+  const focus = await page.createCDPSession();
+  await focus.send('Emulation.setFocusEmulationEnabled', { enabled: true });
   await page.setViewport({ width: 1400, height: 920, deviceScaleFactor: 1 });
   const errors = [];
   page.on('pageerror', (e) =>