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/eachOfLimit.js

@@ -0,0 +1,47 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _eachOfLimit2 = require('./internal/eachOfLimit.js');
+
+var _eachOfLimit3 = _interopRequireDefault(_eachOfLimit2);
+
+var _wrapAsync = require('./internal/wrapAsync.js');
+
+var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
+
+var _awaitify = require('./internal/awaitify.js');
+
+var _awaitify2 = _interopRequireDefault(_awaitify);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * The same as [`eachOf`]{@link module:Collections.eachOf} but runs a maximum of `limit` async operations at a
+ * time.
+ *
+ * @name eachOfLimit
+ * @static
+ * @memberOf module:Collections
+ * @method
+ * @see [async.eachOf]{@link module:Collections.eachOf}
+ * @alias forEachOfLimit
+ * @category Collection
+ * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over.
+ * @param {number} limit - The maximum number of async operations at a time.
+ * @param {AsyncFunction} iteratee - An async function to apply to each
+ * item in `coll`. The `key` is the item's key, or index in the case of an
+ * array.
+ * Invoked with (item, key, callback).
+ * @param {Function} [callback] - A callback which is called when all
+ * `iteratee` functions have finished, or an error occurs. Invoked with (err).
+ * @returns {Promise} a promise, if a callback is omitted
+ */
+function eachOfLimit(coll, limit, iteratee, callback) {
+    return (0, _eachOfLimit3.default)(limit)(coll, (0, _wrapAsync2.default)(iteratee), callback);
+}
+
+exports.default = (0, _awaitify2.default)(eachOfLimit, 4);
+module.exports = exports.default;