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/aria-query/lib/etc/roles/literal/treegridRole.js

@@ -0,0 +1,23 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var treegridRole = {
+  abstract: false,
+  accessibleNameRequired: true,
+  baseConcepts: [],
+  childrenPresentational: false,
+  nameFrom: ['author'],
+  prohibitedProps: [],
+  props: {},
+  relatedConcepts: [],
+  requireContextRole: [],
+  requiredContextRole: [],
+  requiredOwnedElements: [['row'], ['row', 'rowgroup']],
+  requiredProps: {},
+  superClass: [['roletype', 'widget', 'composite', 'grid'], ['roletype', 'structure', 'section', 'table', 'grid'], ['roletype', 'widget', 'composite', 'select', 'tree'], ['roletype', 'structure', 'section', 'group', 'select', 'tree']]
+};
+var _default = treegridRole;
+exports.default = _default;