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-watcher/build/index.mjs

@@ -0,0 +1,10 @@
+import cjsModule from './index.js';
+
+export const BaseWatchPlugin = cjsModule.BaseWatchPlugin;
+export const JestHook = cjsModule.JestHook;
+export const PatternPrompt = cjsModule.PatternPrompt;
+export const Prompt = cjsModule.Prompt;
+export const TestWatcher = cjsModule.TestWatcher;
+export const KEYS = cjsModule.KEYS;
+export const printPatternCaret = cjsModule.printPatternCaret;
+export const printRestoredPatternCaret = cjsModule.printRestoredPatternCaret;