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/pure-rand/lib/esm/distribution/UniformIntDistribution.js

@@ -0,0 +1,12 @@
+import { unsafeUniformIntDistribution } from './UnsafeUniformIntDistribution.js';
+function uniformIntDistribution(from, to, rng) {
+    if (rng != null) {
+        var nextRng = rng.clone();
+        return [unsafeUniformIntDistribution(from, to, nextRng), nextRng];
+    }
+    return function (rng) {
+        var nextRng = rng.clone();
+        return [unsafeUniformIntDistribution(from, to, nextRng), nextRng];
+    };
+}
+export { uniformIntDistribution };