fix(test): e2e stability (#14749)

#### PR Dependency Tree


* **PR #14749** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Improved link preview reliability by updating request identification
to better match modern browsers.
* **Tests**
* Made end-to-end and integration tests deterministic and more robust,
improving AI chat, image generation, attachment handling, settings
visibility, and editor flows.
* **Chores**
* Updated underlying tooling versions to enhance stability and
compatibility.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/kit/src/utils/page-logic.ts

@@ -37,9 +37,12 @@ export async function waitForAllPagesLoad(page: Page) {
 }
 
 export async function clickNewPageButton(page: Page, title?: string) {
-  await page.getByTestId('sidebar-new-page-button').click({
-    // default timeout is 5000ms, but it's not enough for the CI first page load
-    timeout: 20000,
+  const newPageButton = page.getByTestId('sidebar-new-page-button');
+  await expect(newPageButton).toBeVisible({
+    timeout: 30000,
+  });
+  await newPageButton.click({
+    timeout: 30000,
   });
   await waitForEmptyEditor(page);
   if (title) {