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/affine-cloud-copilot/e2e/chat-with/image.spec.ts

@@ -37,11 +37,11 @@ test.describe('AIChatWith/Image', () => {
       },
     ]);
 
-    const { content } = await utils.chatPanel.getLatestAssistantMessage(page);
-    await expect(
-      content.toLowerCase().includes('kitten') ||
-        content.toLowerCase().includes('cat')
-    ).toBe(true);
+    await expect(async () => {
+      const { content } = await utils.chatPanel.getLatestAssistantMessage(page);
+      expect(content.length).toBeGreaterThan(20);
+      expect(content).toMatch(/cat|kitten|feline|tabby|fluffy/i);
+    }).toPass({ timeout: 20000 });
   });
 
   test('support chat with mutiple images', async ({