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/yargs/build/lib/utils/maybe-async-result.js

@@ -0,0 +1,17 @@
+import { isPromise } from './is-promise.js';
+export function maybeAsyncResult(getResult, resultHandler, errorHandler = (err) => {
+    throw err;
+}) {
+    try {
+        const result = isFunction(getResult) ? getResult() : getResult;
+        return isPromise(result)
+            ? result.then((result) => resultHandler(result))
+            : resultHandler(result);
+    }
+    catch (err) {
+        return errorHandler(err);
+    }
+}
+function isFunction(arg) {
+    return typeof arg === 'function';
+}