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/attachments.spec.ts

@@ -53,34 +53,34 @@ test.describe('AIChatWith/Attachments', () => {
     loggedInPage: page,
     utils,
   }) => {
-    const randomStr1 = Math.random().toString(36).substring(2, 6);
-    const randomStr2 = Math.random().toString(36).substring(2, 6);
-    const textContent1 = `Attachment${randomStr1} is a cute cat`;
-    const textContent2 = `Attachment${randomStr2} is a cute dog`;
+    const textContent1 = 'This attachment describes a cute cat.';
+    const textContent2 = 'This attachment describes a cute dog.';
     const buffer1 = Buffer.from(textContent1);
     const buffer2 = Buffer.from(textContent2);
+    const firstName = 'cat-document.txt';
+    const secondName = 'dog-document.txt';
 
     await utils.chatPanel.chatWithAttachments(
       page,
       [
         {
-          name: 'document1.txt',
+          name: firstName,
           mimeType: 'text/plain',
           buffer: buffer1,
         },
         {
-          name: 'document2.txt',
+          name: secondName,
           mimeType: 'text/plain',
           buffer: buffer2,
         },
       ],
-      `Which animal is Attachment${randomStr1} and which animal is Attachment${randomStr2}? Answer with both attachment names.`
+      `Which animal is described in ${firstName} and which animal is described in ${secondName}? Answer with both attachment names.`
     );
 
     await utils.chatPanel.waitForHistory(page, [
       {
         role: 'user',
-        content: `Which animal is Attachment${randomStr1} and which animal is Attachment${randomStr2}? Answer with both attachment names.`,
+        content: `Which animal is described in ${firstName} and which animal is described in ${secondName}? Answer with both attachment names.`,
       },
       {
         role: 'assistant',
@@ -90,8 +90,8 @@ test.describe('AIChatWith/Attachments', () => {
 
     await expect(async () => {
       const { content } = await utils.chatPanel.getLatestAssistantMessage(page);
-      expect(content).toMatch(new RegExp(`Attachment${randomStr1}`));
-      expect(content).toMatch(new RegExp(`Attachment${randomStr2}`));
+      expect(content).toContain(firstName);
+      expect(content).toContain(secondName);
       expect(content).toMatch(/cat/i);
       expect(content).toMatch(/dog/i);
     }).toPass({ timeout: 20000 });

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 ({