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/babel-preset-jest/README.md

@@ -0,0 +1,33 @@
+# babel-preset-jest
+
+> Babel preset for all Jest plugins. This preset is automatically included when using [babel-jest](https://github.com/jestjs/jest/tree/main/packages/babel-jest).
+
+## Install
+
+```sh
+$ npm install --save-dev babel-preset-jest
+```
+
+## Usage
+
+### Via `babel.config.js` (Recommended)
+
+```js
+module.exports = {
+  presets: ['jest'],
+};
+```
+
+### Via CLI
+
+```sh
+$ babel script.js --presets jest
+```
+
+### Via Node API
+
+```javascript
+require('@babel/core').transform('code', {
+  presets: ['jest'],
+});
+```