Apply GPT's suggestions to wait for page load

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

e2e/visual.spec.ts

@@ -3,7 +3,29 @@ import { pages } from "./pages.ts";
 
 for (const pageUrl of pages) {
     test(`visual regression for ${pageUrl}`, async ({ page }) => {
-      await page.goto(pageUrl);
+      await page.goto(pageUrl, { waitUntil: 'networkidle' });
+
+      // 1. Ensure all stylesheets are parsed
+      await page.waitForFunction(() =>
+        Array.from(document.styleSheets).every(
+          s => !s.href || s.cssRules !== null
+        )
+      );
+
+      await page.evaluate(() => document.fonts.ready);
+
+      await page.addStyleTag({
+          content: `
+          *, *::before, *::after {
+              animation: none !important;
+              transition: none !important;
+              caret-color: transparent !important;
+          }
+          `,
+      });
+
+      await page.evaluate(() => new Promise(requestAnimationFrame));
+
       await expect(page).toHaveScreenshot({ fullPage: true });
     });
 }