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/async/internal/parallel.js

@@ -0,0 +1,34 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _isArrayLike = require('./isArrayLike.js');
+
+var _isArrayLike2 = _interopRequireDefault(_isArrayLike);
+
+var _wrapAsync = require('./wrapAsync.js');
+
+var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
+
+var _awaitify = require('./awaitify.js');
+
+var _awaitify2 = _interopRequireDefault(_awaitify);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+exports.default = (0, _awaitify2.default)((eachfn, tasks, callback) => {
+    var results = (0, _isArrayLike2.default)(tasks) ? [] : {};
+
+    eachfn(tasks, (task, key, taskCb) => {
+        (0, _wrapAsync2.default)(task)((err, ...result) => {
+            if (result.length < 2) {
+                [result] = result;
+            }
+            results[key] = result;
+            taskCb(err);
+        });
+    }, err => callback(err, results));
+}, 3);
+module.exports = exports.default;