fix(app): restore tabs without layout flicker

packages/app/e2e/browser/workspace-pane-remount.spec.ts

@@ -9,6 +9,7 @@ import { seedWorkspace } from "../support/helpers/seed-client";
 import { getServerId } from "../support/helpers/server-id";
 import { clickSettingsBackToWorkspace, openCompactSettings } from "../support/helpers/settings";
 import { openSettings } from "../support/helpers/app";
+import { runWorkspaceActionFromCommandCenter } from "../support/helpers/command-center-workspace-actions";
 import {
   clickFirstTerminalTab,
   waitForWorkspaceTabsVisible,
@@ -65,7 +66,7 @@ test.describe("Workspace pane mounting", () => {
         .elementHandle();
       expect(originalComposer).not.toBeNull();
 
-      await page.getByRole("button", { name: "Split pane right" }).first().click();
+      await runWorkspaceActionFromCommandCenter(page, "Split pane right");
       await expect(page.getByTestId("message-input-root").filter({ visible: true })).toHaveCount(
         2,
         { timeout: 30_000 },