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/makeerror/readme.md

@@ -0,0 +1,77 @@
+makeerror [![Build Status](https://secure.travis-ci.org/nshah/nodejs-makeerror.png)](http://travis-ci.org/nshah/nodejs-makeerror)
+=========
+
+A library to make errors.
+
+
+Basics
+------
+
+Makes an Error constructor function with the signature below. All arguments are
+optional, and if the first argument is not a `String`, it will be assumed to be
+`data`:
+
+```javascript
+function(message, data)
+```
+
+You'll typically do something like:
+
+```javascript
+var makeError = require('makeerror')
+var UnknownFileTypeError = makeError(
+  'UnknownFileTypeError',
+  'The specified type is not known.'
+)
+var er = UnknownFileTypeError()
+```
+
+`er` will have a prototype chain that ensures:
+
+```javascript
+er instanceof UnknownFileTypeError
+er instanceof Error
+```
+
+
+Templatized Error Messages
+--------------------------
+
+There is support for simple string substitutions like:
+
+```javascript
+var makeError = require('makeerror')
+var UnknownFileTypeError = makeError(
+  'UnknownFileTypeError',
+  'The specified type "{type}" is not known.'
+)
+var er = UnknownFileTypeError({ type: 'bmp' })
+```
+
+Now `er.message` or `er.toString()` will return `'The specified type "bmp" is
+not known.'`.
+
+
+Prototype Hierarchies
+---------------------
+
+You can create simple hierarchies as well using the `prototype` chain:
+
+```javascript
+var makeError = require('makeerror')
+var ParentError = makeError('ParentError')
+var ChildError = makeError(
+  'ChildError',
+  'The child error.',
+  { proto: ParentError() }
+)
+var er = ChildError()
+```
+
+`er` will have a prototype chain that ensures:
+
+```javascript
+er instanceof ChildError
+er instanceof ParentError
+er instanceof Error
+```