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/json-parse-even-better-errors/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "json-parse-even-better-errors",
+  "version": "2.3.1",
+  "description": "JSON.parse with context information on error",
+  "main": "index.js",
+  "files": [
+    "*.js"
+  ],
+  "scripts": {
+    "preversion": "npm t",
+    "postversion": "npm publish",
+    "prepublishOnly": "git push --follow-tags",
+    "test": "tap",
+    "snap": "tap"
+  },
+  "repository": "https://github.com/npm/json-parse-even-better-errors",
+  "keywords": [
+    "JSON",
+    "parser"
+  ],
+  "author": {
+    "name": "Kat Marchán",
+    "email": "kzm@zkat.tech",
+    "twitter": "maybekatz"
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "tap": "^14.6.5"
+  },
+  "tap": {
+    "check-coverage": true
+  }
+}