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/resolve-cwd/index.d.ts

@@ -0,0 +1,48 @@
+declare const resolveCwd: {
+	/**
+	Resolve the path of a module like [`require.resolve()`](https://nodejs.org/api/globals.html#globals_require_resolve) but from the current working directory.
+
+	@param moduleId - What you would use in `require()`.
+	@returns The resolved module path.
+	@throws When the module can't be found.
+
+	@example
+	```
+	import resolveCwd = require('resolve-cwd');
+
+	console.log(__dirname);
+	//=> '/Users/sindresorhus/rainbow'
+
+	console.log(process.cwd());
+	//=> '/Users/sindresorhus/unicorn'
+
+	console.log(resolveCwd('./foo'));
+	//=> '/Users/sindresorhus/unicorn/foo.js'
+	```
+	*/
+	(moduleId: string): string;
+
+	/**
+	Resolve the path of a module like [`require.resolve()`](https://nodejs.org/api/globals.html#globals_require_resolve) but from the current working directory.
+
+	@param moduleId - What you would use in `require()`.
+	@returns The resolved module path. Returns `undefined` instead of throwing when the module can't be found.
+
+	@example
+	```
+	import resolveCwd = require('resolve-cwd');
+
+	console.log(__dirname);
+	//=> '/Users/sindresorhus/rainbow'
+
+	console.log(process.cwd());
+	//=> '/Users/sindresorhus/unicorn'
+
+	console.log(resolveCwd.silent('./foo'));
+	//=> '/Users/sindresorhus/unicorn/foo.js'
+	```
+	*/
+	silent(moduleId: string): string | undefined;
+};
+
+export = resolveCwd;