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/parse5/README.md

@@ -0,0 +1,38 @@
+<p align="center">
+    <a href="https://github.com/inikulin/parse5">
+        <img src="https://raw.github.com/inikulin/parse5/master/media/logo.png" alt="parse5" />
+    </a>
+</p>
+
+<div align="center">
+<h1>parse5</h1>
+<i><b>HTML parser and serializer.</b></i>
+</div>
+<br>
+
+<div align="center">
+<code>npm install --save parse5</code>
+</div>
+<br>
+
+<p align="center">
+  📖 <a href="https://parse5.js.org/modules/parse5.html"><b>Documentation</b></a> 📖
+</p>
+
+---
+
+<p align="center">
+  <a href="https://github.com/inikulin/parse5/tree/master/docs/list-of-packages.md">List of parse5 toolset packages</a>
+</p>
+
+<p align="center">
+    <a href="https://github.com/inikulin/parse5">GitHub</a>
+</p>
+
+<p align="center">
+  <a href="http://astexplorer.net/#/1CHlCXc4n4">Online playground</a>
+</p>
+
+<p align="center">
+    <a href="https://github.com/inikulin/parse5/releases">Changelog</a>
+</p>