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/@testing-library/user-event/dist/esm/event/dispatchEvent.js

@@ -0,0 +1,50 @@
+import './behavior/click.js';
+import './behavior/cut.js';
+import './behavior/keydown.js';
+import './behavior/keypress.js';
+import './behavior/keyup.js';
+import './behavior/paste.js';
+import { behavior } from './behavior/registry.js';
+import { wrapEvent } from './wrapEvent.js';
+import { isMouseEvent, isKeyboardEvent } from './eventMap.js';
+import { createEvent } from './createEvent.js';
+
+function dispatchUIEvent(target, type, init, preventDefault = false) {
+    if (isMouseEvent(type) || isKeyboardEvent(type)) {
+        init = {
+            ...init,
+            ...this.system.getUIEventModifiers()
+        };
+    }
+    const event = createEvent(type, target, init);
+    return dispatchEvent.call(this, target, event, preventDefault);
+}
+function dispatchEvent(target, event, preventDefault = false) {
+    var _behavior_type;
+    const type = event.type;
+    const behaviorImplementation = preventDefault ? ()=>{} : (_behavior_type = behavior[type]) === null || _behavior_type === undefined ? undefined : _behavior_type.call(behavior, event, target, this);
+    if (behaviorImplementation) {
+        event.preventDefault();
+        let defaultPrevented = false;
+        Object.defineProperty(event, 'defaultPrevented', {
+            get: ()=>defaultPrevented
+        });
+        Object.defineProperty(event, 'preventDefault', {
+            value: ()=>{
+                defaultPrevented = event.cancelable;
+            }
+        });
+        wrapEvent(()=>target.dispatchEvent(event));
+        if (!defaultPrevented) {
+            behaviorImplementation();
+        }
+        return !defaultPrevented;
+    }
+    return wrapEvent(()=>target.dispatchEvent(event));
+}
+function dispatchDOMEvent(target, type, init) {
+    const event = createEvent(type, target, init);
+    wrapEvent(()=>target.dispatchEvent(event));
+}
+
+export { dispatchDOMEvent, dispatchEvent, dispatchUIEvent };