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/react/dist/act-compat.js

@@ -0,0 +1,81 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+exports.getIsReactActEnvironment = getIsReactActEnvironment;
+exports.setReactActEnvironment = setIsReactActEnvironment;
+var React = _interopRequireWildcard(require("react"));
+var DeprecatedReactTestUtils = _interopRequireWildcard(require("react-dom/test-utils"));
+function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
+function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
+const reactAct = typeof React.act === 'function' ? React.act : DeprecatedReactTestUtils.act;
+function getGlobalThis() {
+  /* istanbul ignore else */
+  if (typeof globalThis !== 'undefined') {
+    return globalThis;
+  }
+  /* istanbul ignore next */
+  if (typeof self !== 'undefined') {
+    return self;
+  }
+  /* istanbul ignore next */
+  if (typeof window !== 'undefined') {
+    return window;
+  }
+  /* istanbul ignore next */
+  if (typeof global !== 'undefined') {
+    return global;
+  }
+  /* istanbul ignore next */
+  throw new Error('unable to locate global object');
+}
+function setIsReactActEnvironment(isReactActEnvironment) {
+  getGlobalThis().IS_REACT_ACT_ENVIRONMENT = isReactActEnvironment;
+}
+function getIsReactActEnvironment() {
+  return getGlobalThis().IS_REACT_ACT_ENVIRONMENT;
+}
+function withGlobalActEnvironment(actImplementation) {
+  return callback => {
+    const previousActEnvironment = getIsReactActEnvironment();
+    setIsReactActEnvironment(true);
+    try {
+      // The return value of `act` is always a thenable.
+      let callbackNeedsToBeAwaited = false;
+      const actResult = actImplementation(() => {
+        const result = callback();
+        if (result !== null && typeof result === 'object' && typeof result.then === 'function') {
+          callbackNeedsToBeAwaited = true;
+        }
+        return result;
+      });
+      if (callbackNeedsToBeAwaited) {
+        const thenable = actResult;
+        return {
+          then: (resolve, reject) => {
+            thenable.then(returnValue => {
+              setIsReactActEnvironment(previousActEnvironment);
+              resolve(returnValue);
+            }, error => {
+              setIsReactActEnvironment(previousActEnvironment);
+              reject(error);
+            });
+          }
+        };
+      } else {
+        setIsReactActEnvironment(previousActEnvironment);
+        return actResult;
+      }
+    } catch (error) {
+      // Can't be a `finally {}` block since we don't know if we have to immediately restore IS_REACT_ACT_ENVIRONMENT
+      // or if we have to await the callback first.
+      setIsReactActEnvironment(previousActEnvironment);
+      throw error;
+    }
+  };
+}
+const act = withGlobalActEnvironment(reactAct);
+var _default = exports.default = act;
+/* eslint no-console:0 */