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/get-caller-file/README.md

@@ -0,0 +1,41 @@
+# get-caller-file
+
+[![Build Status](https://travis-ci.org/stefanpenner/get-caller-file.svg?branch=master)](https://travis-ci.org/stefanpenner/get-caller-file)
+[![Build status](https://ci.appveyor.com/api/projects/status/ol2q94g1932cy14a/branch/master?svg=true)](https://ci.appveyor.com/project/embercli/get-caller-file/branch/master)
+
+This is a utility, which allows a function to figure out from which file it was invoked. It does so by inspecting v8's stack trace at the time it is invoked.
+
+Inspired by http://stackoverflow.com/questions/13227489
+
+*note: this relies on Node/V8 specific APIs, as such other runtimes may not work*
+
+## Installation
+
+```bash
+yarn add get-caller-file
+```
+
+## Usage
+
+Given:
+
+```js
+// ./foo.js
+const getCallerFile = require('get-caller-file');
+
+module.exports = function() {
+  return getCallerFile(); // figures out who called it
+};
+```
+
+```js
+// index.js
+const foo = require('./foo');
+
+foo() // => /full/path/to/this/file/index.js
+```
+
+
+## Options:
+
+* `getCallerFile(position = 2)`: where position is stack frame whos fileName we want.