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/is-arrayish/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "is-arrayish",
+  "description": "Determines if an object can be used as an array",
+  "version": "0.2.1",
+  "author": "Qix (http://github.com/qix-)",
+  "keywords": [
+    "is",
+    "array",
+    "duck",
+    "type",
+    "arrayish",
+    "similar",
+    "proto",
+    "prototype",
+    "type"
+  ],
+  "license": "MIT",
+  "scripts": {
+    "pretest": "xo",
+    "test": "mocha --compilers coffee:coffee-script/register"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/qix-/node-is-arrayish.git"
+  },
+  "devDependencies": {
+    "coffee-script": "^1.9.3",
+    "coveralls": "^2.11.2",
+    "istanbul": "^0.3.17",
+    "mocha": "^2.2.5",
+    "should": "^7.0.1",
+    "xo": "^0.6.1"
+  }
+}