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/xml-name-validator/README.md

@@ -0,0 +1,35 @@
+# Validate XML Names and Qualified Names
+
+This package simply tells you whether or not a string matches the [`Name`](http://www.w3.org/TR/xml/#NT-Name) or [`QName`](http://www.w3.org/TR/xml-names/#NT-QName) productions in the XML Namespaces specification. We use it for implementing the [validate](https://dom.spec.whatwg.org/#validate) algorithm in jsdom, but you can use it for whatever you want.
+
+## Usage
+
+This package's main module exports two functions, `name()` and `qname()`. Both take a string and return a boolean indicating whether or not the string matches the relevant production.
+
+```js
+"use strict":
+const xnv = require("xml-name-validator");
+
+// Will return true
+xnv.name("x");
+xnv.name(":");
+xnv.name("a:0");
+xnv.name("a:b:c");
+
+// Will return false
+xnv.name("\\");
+xnv.name("'");
+xnv.name("0");
+xnv.name("a!");
+
+// Will return true
+xnv.qname("x");
+xnv.qname("a0");
+xnv.qname("a:b");
+
+// Will return false
+xnv.qname(":a");
+xnv.qname(":b");
+xnv.qname("a:b:c");
+xnv.qname("a:0");
+```