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/synckit/package.json

@@ -0,0 +1,45 @@
+{
+  "name": "synckit",
+  "version": "0.11.8",
+  "type": "module",
+  "description": "Perform async work synchronously in Node.js using `worker_threads` with first-class TypeScript support.",
+  "repository": "https://github.com/un-ts/synckit.git",
+  "author": "JounQin <admin@1stg.me> (https://www.1stG.me)",
+  "funding": "https://opencollective.com/synckit",
+  "license": "MIT",
+  "engines": {
+    "node": "^14.18.0 || >=16.0.0"
+  },
+  "main": "./lib/index.cjs",
+  "types": "./lib/index.d.cts",
+  "module": "./lib/index.js",
+  "exports": {
+    "import": {
+      "types": "./lib/index.d.ts",
+      "default": "./lib/index.js"
+    },
+    "require": {
+      "types": "./lib/index.d.cts",
+      "default": "./lib/index.cjs"
+    }
+  },
+  "files": [
+    "index.d.cts",
+    "lib",
+    "!**/*.tsbuildinfo"
+  ],
+  "keywords": [
+    "deasync",
+    "make-synchronized",
+    "make-synchronous",
+    "sync",
+    "sync-exec",
+    "sync-rpc",
+    "sync-threads",
+    "synchronize",
+    "synckit"
+  ],
+  "dependencies": {
+    "@pkgr/core": "^0.2.4"
+  }
+}