feat(server): improve context management (#15448)

#### PR Dependency Tree


* **PR #15448** 👈

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

* **New Features**
* Added workspace artifact upload, browsing, removal, deduplication, and
library ownership support.
* Copilot now supports scoped document and artifact search, canvas
reading, live editor context, and frontend tools.
* Added scope and focus selectors with source-resolution receipts in
chat.
* Added embedding health, progress, synchronization, and retrieval
capabilities.
* Added BYOK policy visibility, provider restrictions, endpoint dialect
selection, and validation.
* Added delegated editor interactions and userdata document
authorization.

* **Bug Fixes**
* Improved attachment handling, cancellation, access control, retrieval
fallbacks, workspace synchronization, and configuration validation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/affine-cloud-copilot/e2e/settings/embedding.spec.ts

@@ -7,7 +7,7 @@ test.describe.configure({ mode: 'serial' });
 
 test.describe('AISettings/Embedding', () => {
   test.beforeEach(async ({ loggedInPage: page, utils }) => {
-    await utils.testUtils.setupTestEnvironment(page, 'claude-sonnet-4-6');
+    await utils.testUtils.setupTestEnvironment(page);
     await utils.chatPanel.openChatPanel(page);
   });
 
@@ -158,28 +158,8 @@ test.describe('AISettings/Embedding', () => {
       },
     ];
 
-    const client = await page.context().newCDPSession(page);
-    await client.send('Network.enable');
-    await client.send('Network.emulateNetworkConditions', {
-      offline: false,
-      latency: 1000,
-      downloadThroughput: (50 * 1024) / 8,
-      uploadThroughput: (50 * 1024) / 8,
-      connectionType: 'cellular3g',
-    });
-
     await utils.settings.uploadWorkspaceEmbedding(page, attachments);
 
-    await client.send('Network.emulateNetworkConditions', {
-      offline: false,
-      latency: 0,
-      downloadThroughput: -1,
-      uploadThroughput: -1,
-    });
-
-    await utils.settings.disableWorkspaceEmbedding(page);
-    await utils.settings.enableWorkspaceEmbedding(page);
-
     await utils.settings.waitForFileEmbeddingReadiness(page, 2);
 
     await utils.settings.closeSettingsPanel(page);
@@ -236,7 +216,7 @@ test.describe('AISettings/Embedding', () => {
     await page.context().setOffline(false);
   });
 
-  test('should support hybrid search for both globally uploaded attachments and those uploaded in the current session', async ({
+  test('should isolate selected attachments from workspace artifact search', async ({
     loggedInPage: page,
     utils,
   }) => {
@@ -287,8 +267,8 @@ test.describe('AISettings/Embedding', () => {
     await expect(async () => {
       const { message } = await utils.chatPanel.getLatestAssistantMessage(page);
       const fullText = await message.innerText();
-      expect(fullText).toMatch(/climbing/i);
       expect(fullText).toMatch(/skating/i);
+      expect(fullText).not.toMatch(/climbing/i);
       expect(
         await message.locator('affine-footnote-node').count()
       ).toBeGreaterThanOrEqual(1);
@@ -305,7 +285,7 @@ test.describe('AISettings/Embedding', () => {
     const attachments = Array.from({ length: 11 }, (_, i) => ({
       name: `document${i + 1}.txt`,
       mimeType: 'text/plain',
-      buffer: Buffer.from('attachment content'),
+      buffer: Buffer.from(`attachment content ${i + 1}`),
     }));
 
     await utils.settings.uploadWorkspaceEmbedding(page, attachments);