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/kit/src/utils/cloud.ts

@@ -308,6 +308,7 @@ export async function enableCloudWorkspace(page: Page) {
   await waitForAllPagesLoad(page);
   await dismissBlockingModal(page);
   await clickNewPageButton(page);
+  await waitForWorkspaceSynced(page);
 }
 
 export async function enableCloudWorkspaceFromShareButton(page: Page) {
@@ -324,6 +325,32 @@ export async function enableCloudWorkspaceFromShareButton(page: Page) {
   await waitForEditorLoad(page);
   await dismissBlockingModal(page);
   await clickNewPageButton(page);
+  await waitForWorkspaceSynced(page);
+}
+
+async function waitForWorkspaceSynced(page: Page) {
+  await page.evaluate(async () => {
+    const workspaceId = location.pathname.split('/')[2];
+    const workspace = (
+      window as typeof window & {
+        currentWorkspace?: {
+          engine: {
+            doc: {
+              waitForSynced(docId: string, abort: AbortSignal): Promise<void>;
+            };
+          };
+        };
+      }
+    ).currentWorkspace;
+    if (!workspaceId || !workspace) {
+      throw new Error('Cloud workspace is unavailable');
+    }
+    const abort = AbortSignal.timeout(60_000);
+    await Promise.all([
+      workspace.engine.doc.waitForSynced(workspaceId, abort),
+      workspace.engine.doc.waitForSynced('db$docProperties', abort),
+    ]);
+  });
 }
 
 export async function enableShare(page: Page) {