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/convenience/click.js

@@ -0,0 +1,31 @@
+async function click(element) {
+    const pointerIn = [];
+    if (!this.config.skipHover) {
+        pointerIn.push({
+            target: element
+        });
+    }
+    pointerIn.push({
+        keys: '[MouseLeft]',
+        target: element
+    });
+    return this.pointer(pointerIn);
+}
+async function dblClick(element) {
+    return this.pointer([
+        {
+            target: element
+        },
+        '[MouseLeft][MouseLeft]'
+    ]);
+}
+async function tripleClick(element) {
+    return this.pointer([
+        {
+            target: element
+        },
+        '[MouseLeft][MouseLeft][MouseLeft]'
+    ]);
+}
+
+export { click, dblClick, tripleClick };

frontend/node_modules/@testing-library/user-event/dist/esm/convenience/hover.js

@@ -0,0 +1,16 @@
+import '../utils/dataTransfer/Clipboard.js';
+import { assertPointerEvents } from '../utils/pointer/cssPointerEvents.js';
+
+async function hover(element) {
+    return this.pointer({
+        target: element
+    });
+}
+async function unhover(element) {
+    assertPointerEvents(this, this.system.pointer.getMouseTarget(this));
+    return this.pointer({
+        target: element.ownerDocument.body
+    });
+}
+
+export { hover, unhover };

frontend/node_modules/@testing-library/user-event/dist/esm/convenience/index.js

@@ -0,0 +1,3 @@
+export { click, dblClick, tripleClick } from './click.js';
+export { hover, unhover } from './hover.js';
+export { tab } from './tab.js';

frontend/node_modules/@testing-library/user-event/dist/esm/convenience/tab.js

@@ -0,0 +1,5 @@
+async function tab({ shift } = {}) {
+    return this.keyboard(shift === true ? '{Shift>}{Tab}{/Shift}' : shift === false ? '[/ShiftLeft][/ShiftRight]{Tab}' : '{Tab}');
+}
+
+export { tab };