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/e2e/global-setup.ts

@@ -0,0 +1,31 @@
+import { chromium, FullConfig } from '@playwright/test';
+
+async function globalSetup(config: FullConfig) {
+  console.log('🚀 Starting global setup for Playwright tests...');
+  
+  // Check if backend is running
+  try {
+    const browser = await chromium.launch();
+    const page = await browser.newPage();
+    
+    // Try to reach the backend health endpoint
+    try {
+      const response = await page.request.get('http://localhost:8087/health');
+      if (!response.ok()) {
+        console.warn('⚠️ Backend health check failed. Some tests may fail.');
+      } else {
+        console.log('✅ Backend is running and healthy');
+      }
+    } catch (error) {
+      console.warn('⚠️ Could not reach backend. Some tests may fail:', error);
+    }
+    
+    await browser.close();
+  } catch (error) {
+    console.error('❌ Global setup failed:', error);
+  }
+  
+  console.log('✅ Global setup completed');
+}
+
+export default globalSetup;