Set up comprehensive frontend testing infrastructure

- Install Jest for unit testing with React Testing Library
- Install Playwright for end-to-end testing
- Configure Jest with proper TypeScript support and module mapping
- Create test setup files and utilities for both unit and e2e tests

Components:
* Jest configuration with coverage thresholds
* Playwright configuration with browser automation
* Unit tests for LoginForm, AuthContext, and useSocketIO hook
* E2E tests for authentication, dashboard, and agents workflows
* GitHub Actions workflow for automated testing
* Mock data and API utilities for consistent testing
* Test documentation with best practices

Testing features:
- Unit tests with 70% coverage threshold
- E2E tests with API mocking and user journey testing
- CI/CD integration for automated test runs
- Cross-browser testing support with Playwright
- Authentication system testing end-to-end

🚀 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/node_modules/jake/README.md

@@ -0,0 +1,17 @@
+### Jake -- the JavaScript build tool for Node.js
+
+[![Build Status](https://travis-ci.org/jakejs/jake.svg?branch=master)](https://travis-ci.org/jakejs/jake)
+
+Documentation site at [http://jakejs.com](http://jakejs.com/)
+
+### Contributing
+1. [Install node](http://nodejs.org/#download).
+2. Clone this repository `$ git clone git@github.com:jakejs/jake.git`.
+3. Install dependencies `$ npm install`.
+4. Run tests with `$ npm test`.
+5. Start Hacking!
+
+### License
+
+Licensed under the Apache License, Version 2.0
+(<http://www.apache.org/licenses/LICENSE-2.0>)