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/@jest/fake-timers/build/index.d.ts

@@ -0,0 +1,113 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {Config} from '@jest/types';
+import {StackTraceConfig} from 'jest-message-util';
+import {ModuleMocker} from 'jest-mock';
+
+declare type Callback = (...args: Array<unknown>) => void;
+
+export declare class LegacyFakeTimers<TimerRef = unknown> {
+  #private;
+  private _cancelledTicks;
+  private readonly _config;
+  private _disposed;
+  private _fakeTimerAPIs;
+  private _fakingTime;
+  private readonly _global;
+  private _immediates;
+  private readonly _maxLoops;
+  private readonly _moduleMocker;
+  private _now;
+  private _ticks;
+  private readonly _timerAPIs;
+  private _timers;
+  private _uuidCounter;
+  private readonly _timerConfig;
+  constructor({
+    global,
+    moduleMocker,
+    timerConfig,
+    config,
+    maxLoops,
+  }: {
+    global: typeof globalThis;
+    moduleMocker: ModuleMocker;
+    timerConfig: TimerConfig<TimerRef>;
+    config: StackTraceConfig;
+    maxLoops?: number;
+  });
+  clearAllTimers(): void;
+  dispose(): void;
+  reset(): void;
+  now(): number;
+  runAllTicks(): void;
+  runAllImmediates(): void;
+  private _runImmediate;
+  runAllTimers(): void;
+  runOnlyPendingTimers(): void;
+  advanceTimersToNextTimer(steps?: number): void;
+  advanceTimersByTime(msToRun: number): void;
+  runWithRealTimers(cb: Callback): void;
+  useRealTimers(): void;
+  useFakeTimers(): void;
+  getTimerCount(): number;
+  private _checkFakeTimers;
+  private _createMocks;
+  private _fakeClearTimer;
+  private _fakeClearImmediate;
+  private _fakeNextTick;
+  private _fakeRequestAnimationFrame;
+  private _fakeSetImmediate;
+  private _fakeSetInterval;
+  private _fakeSetTimeout;
+  private _getNextTimerHandleAndExpiry;
+  private _runTimerHandle;
+}
+
+export declare class ModernFakeTimers {
+  private _clock;
+  private readonly _config;
+  private _fakingTime;
+  private readonly _global;
+  private readonly _fakeTimers;
+  constructor({
+    global,
+    config,
+  }: {
+    global: typeof globalThis;
+    config: Config.ProjectConfig;
+  });
+  clearAllTimers(): void;
+  dispose(): void;
+  runAllTimers(): void;
+  runAllTimersAsync(): Promise<void>;
+  runOnlyPendingTimers(): void;
+  runOnlyPendingTimersAsync(): Promise<void>;
+  advanceTimersToNextTimer(steps?: number): void;
+  advanceTimersToNextTimerAsync(steps?: number): Promise<void>;
+  advanceTimersByTime(msToRun: number): void;
+  advanceTimersByTimeAsync(msToRun: number): Promise<void>;
+  advanceTimersToNextFrame(): void;
+  runAllTicks(): void;
+  useRealTimers(): void;
+  useFakeTimers(fakeTimersConfig?: Config.FakeTimersConfig): void;
+  reset(): void;
+  setSystemTime(now?: number | Date): void;
+  getRealSystemTime(): number;
+  now(): number;
+  getTimerCount(): number;
+  private _checkFakeTimers;
+  private _toSinonFakeTimersConfig;
+}
+
+declare type TimerConfig<Ref> = {
+  idToRef: (id: number) => Ref;
+  refToId: (ref: Ref) => number | void;
+};
+
+export {};