perf: optimize app startup and background lifecycles

tests/unit/agent-browser-routes.test.ts

@@ -1,6 +1,6 @@
 import { EventEmitter } from 'node:events';
 import type { IncomingMessage, ServerResponse } from 'node:http';
-import { mkdtemp, rm } from 'node:fs/promises';
+import { mkdtemp, realpath, rm } from 'node:fs/promises';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
@@ -93,7 +93,7 @@ describe('Agent Browser Host API routes', () => {
   async function temporaryProject(prefix: string): Promise<string> {
     const directory = await mkdtemp(join(tmpdir(), prefix));
     temporaryDirectories.push(directory);
-    return directory;
+    return await realpath(directory);
   }
 
   it('opens the browser for the active project and emits a visible hint', async () => {