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/pkg-dir/index.js

@@ -0,0 +1,17 @@
+'use strict';
+const path = require('path');
+const findUp = require('find-up');
+
+const pkgDir = async cwd => {
+	const filePath = await findUp('package.json', {cwd});
+	return filePath && path.dirname(filePath);
+};
+
+module.exports = pkgDir;
+// TODO: Remove this for the next major release
+module.exports.default = pkgDir;
+
+module.exports.sync = cwd => {
+	const filePath = findUp.sync('package.json', {cwd});
+	return filePath && path.dirname(filePath);
+};