WIP: Large refactor checkpoint

- Refactored daemon client and RPC layer
- Added new client package structure in server
- Removed legacy hooks (use-daemon-request, use-session-rpc, use-websocket)
- Added use-daemon-client hook
- Added e2e test infrastructure with Playwright
- Updated agent providers and session handling
- Removed codex-sdk patches

packages/app/e2e/daemon-connectivity.spec.ts

@@ -0,0 +1,11 @@
+import { test, expect } from './fixtures';
+import { gotoHome, openSettings } from './helpers/app';
+
+test('daemon is connected in settings', async ({ page }) => {
+  await gotoHome(page);
+  await openSettings(page);
+
+  await expect(page.getByText('localhost', { exact: true })).toBeVisible();
+  await expect(page.getByText('ws://localhost:6767/ws')).toBeVisible();
+  await expect(page.getByText('Online', { exact: true })).toBeVisible();
+});