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/timesSeries.js

@@ -0,0 +1,32 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+exports.default = timesSeries;
+
+var _timesLimit = require('./timesLimit.js');
+
+var _timesLimit2 = _interopRequireDefault(_timesLimit);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * The same as [times]{@link module:ControlFlow.times} but runs only a single async operation at a time.
+ *
+ * @name timesSeries
+ * @static
+ * @memberOf module:ControlFlow
+ * @method
+ * @see [async.times]{@link module:ControlFlow.times}
+ * @category Control Flow
+ * @param {number} n - The number of times to run the function.
+ * @param {AsyncFunction} iteratee - The async function to call `n` times.
+ * Invoked with the iteration index and a callback: (n, next).
+ * @param {Function} callback - see {@link module:Collections.map}.
+ * @returns {Promise} a promise, if no callback is provided
+ */
+function timesSeries(n, iteratee, callback) {
+    return (0, _timesLimit2.default)(n, 1, iteratee, callback);
+}
+module.exports = exports.default;