fix(editor): editor behavior and styles (#14498)

fix #14269 
fix #13920
fix #13977
fix #13953
fix #13895
fix #13905
fix #14136
fix #14357
fix #14491

#### PR Dependency Tree


* **PR #14498** 👈

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**
  * Callout and toolbar defaults now reliably show grey backgrounds
  * Keyboard shortcuts behave better across layouts and non-ASCII input
  * Deleted workspaces no longer appear in local listings

* **New Features**
  * Cell editing now respects pre-entry validation hooks
* Scrollbars use themeable variables and include Chromium compatibility
fixes

* **Style**
  * Minor UI color adjustment for hidden properties

* **Tests**
  * Added unit tests for table column handling and keymap behavior
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/apps/electron/src/helper/workspace/handlers.ts

@@ -106,9 +106,17 @@ export async function listLocalWorkspaceIds(): Promise<string[]> {
     return [];
   }
 
+  const deletedWorkspaceBasePath = await getDeletedWorkspacesBasePath();
+  const deletedWorkspaceIds = new Set<string>(
+    (await fs.readdir(deletedWorkspaceBasePath).catch(() => [])).filter(Boolean)
+  );
+
   const entries = await fs.readdir(localWorkspaceBasePath);
   const ids = await Promise.all(
     entries.map(async entry => {
+      if (deletedWorkspaceIds.has(entry)) {
+        return null;
+      }
       const workspacePath = path.join(localWorkspaceBasePath, entry);
       const stat = await fs.stat(workspacePath).catch(() => null);
       if (!stat?.isDirectory()) {