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/npm-run-path/index.js

@@ -0,0 +1,47 @@
+'use strict';
+const path = require('path');
+const pathKey = require('path-key');
+
+const npmRunPath = options => {
+	options = {
+		cwd: process.cwd(),
+		path: process.env[pathKey()],
+		execPath: process.execPath,
+		...options
+	};
+
+	let previous;
+	let cwdPath = path.resolve(options.cwd);
+	const result = [];
+
+	while (previous !== cwdPath) {
+		result.push(path.join(cwdPath, 'node_modules/.bin'));
+		previous = cwdPath;
+		cwdPath = path.resolve(cwdPath, '..');
+	}
+
+	// Ensure the running `node` binary is used
+	const execPathDir = path.resolve(options.cwd, options.execPath, '..');
+	result.push(execPathDir);
+
+	return result.concat(options.path).join(path.delimiter);
+};
+
+module.exports = npmRunPath;
+// TODO: Remove this for the next major release
+module.exports.default = npmRunPath;
+
+module.exports.env = options => {
+	options = {
+		env: process.env,
+		...options
+	};
+
+	const env = {...options.env};
+	const path = pathKey({env});
+
+	options.path = env[path];
+	env[path] = module.exports(options);
+
+	return env;
+};