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/create-agent.spec.ts

@@ -0,0 +1,17 @@
+import { test, expect } from './fixtures';
+import { createAgent, ensureHostSelected, gotoHome, setWorkingDirectory } from './helpers/app';
+import { createTempGitRepo } from './helpers/workspace';
+
+test('create agent in a temp repo', async ({ page }) => {
+  const repo = await createTempGitRepo();
+  const message = `E2E create agent ${Date.now()}`;
+
+  try {
+    await gotoHome(page);
+    await setWorkingDirectory(page, repo.path);
+    await ensureHostSelected(page);
+    await createAgent(page, message);
+  } finally {
+    await repo.cleanup();
+  }
+});