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/string-length/package.json

@@ -0,0 +1,45 @@
+{
+	"name": "string-length",
+	"version": "4.0.2",
+	"description": "Get the real length of a string - by correctly counting astral symbols and ignoring ansi escape codes",
+	"license": "MIT",
+	"repository": "sindresorhus/string-length",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "https://sindresorhus.com"
+	},
+	"engines": {
+		"node": ">=10"
+	},
+	"scripts": {
+		"test": "xo && ava && tsd"
+	},
+	"files": [
+		"index.js",
+		"index.d.ts"
+	],
+	"keywords": [
+		"unicode",
+		"string",
+		"length",
+		"size",
+		"count",
+		"astral",
+		"symbol",
+		"surrogates",
+		"codepoints",
+		"ansi",
+		"escape",
+		"codes"
+	],
+	"dependencies": {
+		"char-regex": "^1.0.2",
+		"strip-ansi": "^6.0.0"
+	},
+	"devDependencies": {
+		"ava": "^3.1.0",
+		"tsd": "^0.11.0",
+		"xo": "^0.25.3"
+	}
+}