feat: disable high power consumption without charger (#14281)

Co-authored-by: DarkSky <darksky2048@gmail.com>

tests/kit/src/playwright.ts

@@ -71,6 +71,14 @@ export const test = baseTest.extend<{
     await use(page);
   },
   context: async ({ context }, use) => {
+    // Force-mark the body so global.css knows we are in a test.
+    // This keeps animations ON (0.1s) for tests, but OFF (0ms) for battery users.
+    await context.addInitScript(() => {
+      window.addEventListener('DOMContentLoaded', () => {
+        document.body.classList.add('playwright-test');
+      });
+    });
+
     // workaround for skipping onboarding redirect on the web
     await skipOnboarding(context);