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/playwright/lib/isomorphic/events.js

@@ -0,0 +1,77 @@
+"use strict";
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __hasOwnProp = Object.prototype.hasOwnProperty;
+var __export = (target, all) => {
+  for (var name in all)
+    __defProp(target, name, { get: all[name], enumerable: true });
+};
+var __copyProps = (to, from, except, desc) => {
+  if (from && typeof from === "object" || typeof from === "function") {
+    for (let key of __getOwnPropNames(from))
+      if (!__hasOwnProp.call(to, key) && key !== except)
+        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+  }
+  return to;
+};
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+var events_exports = {};
+__export(events_exports, {
+  Disposable: () => Disposable,
+  EventEmitter: () => EventEmitter
+});
+module.exports = __toCommonJS(events_exports);
+var Disposable;
+((Disposable2) => {
+  function disposeAll(disposables) {
+    for (const disposable of disposables.splice(0))
+      disposable.dispose();
+  }
+  Disposable2.disposeAll = disposeAll;
+})(Disposable || (Disposable = {}));
+class EventEmitter {
+  constructor() {
+    this._listeners = /* @__PURE__ */ new Set();
+    this.event = (listener, disposables) => {
+      this._listeners.add(listener);
+      let disposed = false;
+      const self = this;
+      const result = {
+        dispose() {
+          if (!disposed) {
+            disposed = true;
+            self._listeners.delete(listener);
+          }
+        }
+      };
+      if (disposables)
+        disposables.push(result);
+      return result;
+    };
+  }
+  fire(event) {
+    const dispatch = !this._deliveryQueue;
+    if (!this._deliveryQueue)
+      this._deliveryQueue = [];
+    for (const listener of this._listeners)
+      this._deliveryQueue.push({ listener, event });
+    if (!dispatch)
+      return;
+    for (let index = 0; index < this._deliveryQueue.length; index++) {
+      const { listener, event: event2 } = this._deliveryQueue[index];
+      listener.call(null, event2);
+    }
+    this._deliveryQueue = void 0;
+  }
+  dispose() {
+    this._listeners.clear();
+    if (this._deliveryQueue)
+      this._deliveryQueue = [];
+  }
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  Disposable,
+  EventEmitter
+});