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/pkg-dir/index.d.ts

@@ -0,0 +1,44 @@
+declare const pkgDir: {
+	/**
+	Find the root directory of a Node.js project or npm package.
+
+	@param cwd - Directory to start from. Default: `process.cwd()`.
+	@returns The project root path or `undefined` if it couldn't be found.
+
+	@example
+	```
+	// /
+	// └── Users
+	//     └── sindresorhus
+	//         └── foo
+	//             ├── package.json
+	//             └── bar
+	//                 ├── baz
+	//                 └── example.js
+
+	// example.js
+	import pkgDir = require('pkg-dir');
+
+	(async () => {
+		const rootDir = await pkgDir(__dirname);
+
+		console.log(rootDir);
+		//=> '/Users/sindresorhus/foo'
+	})();
+	```
+	*/
+	(cwd?: string): Promise<string | undefined>;
+
+	/**
+	Synchronously find the root directory of a Node.js project or npm package.
+
+	@param cwd - Directory to start from. Default: `process.cwd()`.
+	@returns The project root path or `undefined` if it couldn't be found.
+	*/
+	sync(cwd?: string): string | undefined;
+
+	// TODO: Remove this for the next major release
+	default: typeof pkgDir;
+};
+
+export = pkgDir;