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/istanbul-lib-report/index.js

@@ -0,0 +1,40 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+
+/**
+ * @module Exports
+ */
+
+const Context = require('./lib/context');
+const watermarks = require('./lib/watermarks');
+const ReportBase = require('./lib/report-base');
+
+module.exports = {
+    /**
+     * returns a reporting context for the supplied options
+     * @param {Object} [opts=null] opts
+     * @returns {Context}
+     */
+    createContext(opts) {
+        return new Context(opts);
+    },
+
+    /**
+     * returns the default watermarks that would be used when not
+     * overridden
+     * @returns {Object} an object with `statements`, `functions`, `branches`,
+     *  and `line` keys. Each value is a 2 element array that has the low and
+     *  high watermark as percentages.
+     */
+    getDefaultWatermarks() {
+        return watermarks.getDefault();
+    },
+
+    /**
+     * Base class for all reports
+     */
+    ReportBase
+};