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/is-arrayish/README.md

@@ -0,0 +1,16 @@
+# node-is-arrayish [![Travis-CI.org Build Status](https://img.shields.io/travis/Qix-/node-is-arrayish.svg?style=flat-square)](https://travis-ci.org/Qix-/node-is-arrayish) [![Coveralls.io Coverage Rating](https://img.shields.io/coveralls/Qix-/node-is-arrayish.svg?style=flat-square)](https://coveralls.io/r/Qix-/node-is-arrayish)
+> Determines if an object can be used like an Array
+
+## Example
+```javascript
+var isArrayish = require('is-arrayish');
+
+isArrayish([]); // true
+isArrayish({__proto__: []}); // true
+isArrayish({}); // false
+isArrayish({length:10}); // false
+```
+
+## License
+Licensed under the [MIT License](http://opensource.org/licenses/MIT).
+You can find a copy of it in [LICENSE](LICENSE).