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/plugin-syntax-nullish-coalescing-operator/README.md

@@ -0,0 +1,19 @@
+# @babel/plugin-syntax-nullish-coalescing-operator
+
+> Allow parsing of the nullish-coalescing operator
+
+See our website [@babel/plugin-syntax-nullish-coalescing-operator](https://babeljs.io/docs/en/next/babel-plugin-syntax-nullish-coalescing-operator.html) for more information.
+
+## Install
+
+Using npm:
+
+```sh
+npm install --save-dev @babel/plugin-syntax-nullish-coalescing-operator
+```
+
+or using yarn:
+
+```sh
+yarn add @babel/plugin-syntax-nullish-coalescing-operator --dev
+```