refactor: consolidate agent wait methods and use in-memory MCP transport

packages/app/e2e/helpers/app.ts

@@ -422,7 +422,7 @@ export const denyPermission = async (page: Page) => {
   await denyButton.click();
 };
 
-export async function waitForAgentIdle(page: Page, timeout = 30000) {
+export async function waitForAgentFinishUI(page: Page, timeout = 30000) {
   const stopButton = page.getByRole('button', { name: /stop|cancel/i });
   await expect(stopButton).not.toBeVisible({ timeout });
 }

packages/app/e2e/permission-prompt.spec.ts

@@ -6,7 +6,7 @@ import {
   waitForPermissionPrompt,
   allowPermission,
   denyPermission,
-  waitForAgentIdle,
+  waitForAgentFinishUI,
   getToolCallCount,
 } from './helpers/app';
 import { createTempGitRepo } from './helpers/workspace';
@@ -63,7 +63,7 @@ test.describe('permission prompts', () => {
 
       await waitForPermissionPrompt(page, 30000);
       await denyPermission(page);
-      await waitForAgentIdle(page);
+      await waitForAgentFinishUI(page);
 
       expect(existsSync(filePath)).toBe(false);