Switch apps e2e (#317)

e2e-tests/switch_apps.spec.ts

+import { test } from "./helpers/test_helper";
+import { expect } from "@playwright/test";
+
+test("switch apps", async ({ po }) => {
+  await po.setUp();
+  await po.sendPrompt("hi");
+  const firstAppName = await po.getCurrentAppName();
+
+  await po.goToAppsTab();
+  await po.sendPrompt("second-app");
+  const secondAppName = await po.getCurrentAppName();
+  expect(secondAppName).not.toBe(firstAppName);
+});