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/utils/test-utils.ts

@@ -58,16 +58,8 @@ export class TestUtils {
     await waitForEditorLoad(page);
   }
 
-  public async setupTestEnvironment(page: Page, defaultModel?: string) {
-    const selectedModel = defaultModel ?? 'gpt-5.6-luna';
-
+  public async setupTestEnvironment(page: Page) {
     await skipOnboarding(page.context());
-    await page.context().addInitScript(model => {
-      window.localStorage.setItem(
-        'global-state:AIModelId',
-        JSON.stringify(model)
-      );
-    }, selectedModel);
     await openHomePage(page);
     await this.createNewPage(page);
   }