feat: persist settings and enrich conversation context

tests/browser-client.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it, vi } from 'vitest';
-import type { BrowserContext } from 'playwright';
+import type { BrowserContext, Page } from 'playwright';
 import { BrowserClient, type BrowserRuntime } from '../src/browser/client.js';
 import type { Logger } from '../src/utils/logger.js';
 import { getTestConfig } from './testUtils.js';
@@ -35,4 +35,25 @@ describe('BrowserClient', () => {
     expect(client.getSessionState()).toBe('unknown');
     expect(JSON.stringify(logger)).not.toContain('secret');
   });
+
+  it('reads the username from Reddit\'s nested me.json account response', async () => {
+    const fetchMock = vi.fn().mockResolvedValue({
+      ok: true,
+      json: async () => ({ kind: 't2', data: { name: 'bot-account' } }),
+    });
+    vi.stubGlobal('fetch', fetchMock);
+    const page = {
+      evaluate: async (pageFunction: () => Promise<string | null>) => pageFunction(),
+    } as unknown as Page;
+    const context = { pages: () => [page] } as unknown as BrowserContext;
+    const runtime: BrowserRuntime = { launchPersistentContext: vi.fn().mockResolvedValue(context) };
+    const client = new BrowserClient(getTestConfig(), createLogger(), runtime);
+
+    await expect(client.getAuthenticatedUsername()).resolves.toBe('bot-account');
+    expect(fetchMock).toHaveBeenCalledWith(
+      'https://www.reddit.com/api/me.json',
+      { credentials: 'include' },
+    );
+    vi.unstubAllGlobals();
+  });
 });