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/collect-v8-coverage/README.md

@@ -0,0 +1,15 @@
+# collect-v8-coverage
+
+Use this module to start and stop the V8 inspector manually and collect precise coverage.
+
+```js
+const {CoverageInstrumenter} = require('collect-v8-coverage');
+
+const instrumenter = new CoverageInstrumenter();
+
+await instrumenter.startInstrumenting();
+
+// require some modules, run some code
+
+const coverage = await instrumenter.stopInstrumenting();
+```