feat(server): converge legacy compatibility (#15426)

#### PR Dependency Tree


* **PR #15426** 👈

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 BYOK profiles with provider/model catalogs, capability
validation, connection probing, credential rotation, reordering, and
secure local leases.
* Added Copilot route options, selectable targets, managed tiers,
explicit profile/model overrides, and improved streaming with tool
callbacks and abort support.
* Added Copilot availability controls to prevent access when the feature
is disabled.
* **Changes**
* Simplified Copilot configuration and removed legacy provider-specific
settings.
* Removed obsolete model, token-cost, transcript strategy, and provider
metadata fields from public responses.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/affine-cloud-copilot/e2e/utils/test-utils.ts

@@ -1,8 +1,5 @@
 import { skipOnboarding } from '@affine-test/kit/playwright';
-import {
-  createRandomAIUser,
-  switchDefaultChatModel,
-} from '@affine-test/kit/utils/cloud';
+import { createRandomAIUser } from '@affine-test/kit/utils/cloud';
 import { openHomePage, setCoreUrl } from '@affine-test/kit/utils/load-page';
 import {
   clickNewPageButton,
@@ -63,7 +60,6 @@ export class TestUtils {
 
   public async setupTestEnvironment(page: Page, defaultModel?: string) {
     const selectedModel = defaultModel ?? 'gpt-5.6-luna';
-    await switchDefaultChatModel(selectedModel);
 
     await skipOnboarding(page.context());
     await page.context().addInitScript(model => {