fix(app): restore tabs without layout flicker

packages/app/e2e/browser/agent-message-rewind.spec.ts

@@ -28,7 +28,7 @@ async function completeSubmittedTurn(
 async function rewindConversation(page: Page, userMessage: Locator, prompt: string): Promise<void> {
   await userMessage.getByText(prompt, { exact: true }).hover();
   await userMessage.getByRole("button", { name: "Rewind to this message", exact: true }).click();
-  await page.getByRole("button", { name: "Rewind conversation", exact: true }).click();
+  await page.getByRole("menuitem", { name: "Rewind conversation", exact: true }).click();
 }
 
 async function expectTurnCompletesNormally(

packages/app/e2e/browser/appearance-theme-picker.spec.ts

@@ -45,9 +45,9 @@ test("keeps the selected workspace visible in Pure black", async ({ page }, test
   }
 });
 
-test("applies the interface font size to settings text", async ({ page }) => {
+test("applies the base font size to settings text", async ({ page }) => {
   await page.addInitScript(() => {
-    localStorage.setItem("@paseo:app-settings", JSON.stringify({ uiFontSize: 24 }));
+    localStorage.setItem("@paseo:app-settings", JSON.stringify({ uiBaseFontSize: 21 }));
   });
   await page.goto("/settings");
   await expect(page.getByTestId("settings-sidebar")).toBeVisible();
@@ -56,11 +56,11 @@ test("applies the interface font size to settings text", async ({ page }) => {
   const sectionTitle = page.getByText("Theme", { exact: true }).first();
   await expect(sectionTitle).toHaveCSS("font-size", "18px");
 
-  const fontSizeInput = page.getByLabel("Interface font size");
-  await expect(fontSizeInput).toHaveValue("24");
+  const fontSizeInput = page.getByLabel("Base font size");
+  await expect(fontSizeInput).toHaveValue("21");
   await fontSizeInput.fill("12");
   await fontSizeInput.press("Tab");
 
   await expect(fontSizeInput).toHaveValue("12");
-  await expect(sectionTitle).toHaveCSS("font-size", "9px");
+  await expect(sectionTitle).toHaveCSS("font-size", "10px");
 });

packages/app/e2e/browser/settings-i18n.spec.ts

@@ -12,12 +12,12 @@ test("Settings language selector switches General labels", async ({ page }) => {
   await expect(page.getByText("Default send", { exact: true }).first()).toBeVisible();
 
   await page.getByRole("button", { name: "System", exact: true }).click();
-  await page.getByRole("button", { name: "简体中文 - Simplified Chinese", exact: true }).click();
+  await page.getByRole("menuitem", { name: "简体中文 - Simplified Chinese", exact: true }).click();
 
   await expect(page.getByText("默认发送", { exact: true }).first()).toBeVisible();
 
   await page.getByRole("button", { name: "简体中文", exact: true }).click();
-  await page.getByRole("button", { name: "English - 英语", exact: true }).click();
+  await page.getByRole("menuitem", { name: "English - 英语", exact: true }).click();
 
   await expect(page.getByText("Default send", { exact: true }).first()).toBeVisible();
 });
@@ -30,12 +30,12 @@ test("Settings language selector switches to Korean", async ({ page }) => {
   await openSettingsSection(page, "general");
 
   await page.getByRole("button", { name: "System", exact: true }).click();
-  await page.getByRole("button", { name: "한국어 - Korean", exact: true }).click();
+  await page.getByRole("menuitem", { name: "한국어 - Korean", exact: true }).click();
 
   await expect(page.getByText("기본 전송", { exact: true }).first()).toBeVisible();
 
   await page.getByRole("button", { name: "한국어", exact: true }).click();
-  await page.getByRole("button", { name: "English - 영어", exact: true }).click();
+  await page.getByRole("menuitem", { name: "English - 영어", exact: true }).click();
 
   await expect(page.getByText("Default send", { exact: true }).first()).toBeVisible();
 });

packages/app/e2e/browser/terminal-split-resize.spec.ts

@@ -2,6 +2,7 @@ import type { Page } from "@playwright/test";
 import { test, expect } from "../support/fixtures";
 import { TerminalE2EHarness, withTerminalInApp } from "../support/helpers/terminal-dsl";
 import { waitForTerminalContent } from "../support/helpers/terminal-perf";
+import { runWorkspaceActionFromCommandCenter } from "../support/helpers/command-center-workspace-actions";
 
 interface TerminalSize {
   rows: number | null;
@@ -82,7 +83,7 @@ async function verifySplitDownResizesPty(page: Page, harness: TerminalE2EHarness
 
     // Split the pane downward. This focuses the new empty pane, so the terminal
     // pane is unfocused at the exact moment its container shrinks.
-    await page.getByRole("button", { name: "Split pane down" }).first().click();
+    await runWorkspaceActionFromCommandCenter(page, "Split pane down");
 
     // The local xterm renderer shrinks immediately on split - the part of the
     // behaviour that already works and that makes the bug look like nothing changed.

packages/app/e2e/browser/viewed-agent-timelines.spec.ts

@@ -6,6 +6,7 @@ import { getServerId } from "../support/helpers/server-id";
 import { observeTimelineSubscriptions } from "../support/helpers/timeline-delivery";
 import { waitForWorkspaceTabsVisible } from "../support/helpers/workspace-tabs";
 import { installDaemonWebSocketGate } from "../support/helpers/daemon-websocket-gate";
+import { runWorkspaceActionFromCommandCenter } from "../support/helpers/command-center-workspace-actions";
 import {
   expectAgentIdle,
   expectInlineWorkingIndicator,
@@ -150,7 +151,7 @@ test.describe("Viewed agent timelines", () => {
     try {
       await enableMoveTabShortcut(page);
       await openAgent(page, scenario, scenario.firstAgentId);
-      await page.getByRole("button", { name: "Split pane right" }).click();
+      await runWorkspaceActionFromCommandCenter(page, "Split pane right");
       await selectAgent(page, "Second viewed chat");
       await moveActiveTabRight(page);
       await expect(

packages/app/e2e/browser/workspace-focus-mode.spec.ts

@@ -43,7 +43,9 @@ test("sidebar shortcuts exit focus mode and execute their action", async ({
   await pressRightSidebarShortcut(page);
 
   await expect(exitFocusModeButton(page)).toHaveCount(0);
-  await expect(page.getByText("Changes", { exact: true })).toBeVisible();
+  await expect(
+    page.getByText("Changes", { exact: true }).filter({ visible: true }).first(),
+  ).toBeVisible();
 });
 
 test("sidebar shortcuts outside a workspace preserve its focus mode", async ({

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 },