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/error-ex/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "error-ex",
+  "description": "Easy error subclassing and stack customization",
+  "version": "1.3.2",
+  "maintainers": [
+    "Josh Junon <i.am.qix@gmail.com> (github.com/qix-)",
+    "Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)"
+  ],
+  "keywords": [
+    "error",
+    "errors",
+    "extend",
+    "extending",
+    "extension",
+    "subclass",
+    "stack",
+    "custom"
+  ],
+  "license": "MIT",
+  "scripts": {
+    "pretest": "xo",
+    "test": "mocha --compilers coffee:coffee-script/register"
+  },
+  "xo": {
+    "rules": {
+      "operator-linebreak": [
+        0
+      ]
+    }
+  },
+  "repository": "qix-/node-error-ex",
+  "files": [
+    "index.js"
+  ],
+  "devDependencies": {
+    "coffee-script": "^1.9.3",
+    "coveralls": "^2.11.2",
+    "istanbul": "^0.3.17",
+    "mocha": "^2.2.5",
+    "should": "^7.0.1",
+    "xo": "^0.7.1"
+  },
+  "dependencies": {
+    "is-arrayish": "^0.2.1"
+  }
+}