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/ts-jest/presets/default-esm-legacy/jest-preset.js

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+module.exports = require('..').defaultsESMLegacy

frontend/node_modules/ts-jest/presets/default-esm/jest-preset.js

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+module.exports = require('..').defaultsESM

frontend/node_modules/ts-jest/presets/default-legacy/jest-preset.js

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+module.exports = require('..').defaultsLegacy

frontend/node_modules/ts-jest/presets/default/jest-preset.js

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+module.exports = require('..').defaults

frontend/node_modules/ts-jest/presets/index.d.ts

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+import allPresets from '../dist/presets/all-presets'
+
+export = allPresets

frontend/node_modules/ts-jest/presets/index.js

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+const allPresets = require('../dist/presets/all-presets')
+
+module.exports = allPresets.default

frontend/node_modules/ts-jest/presets/js-with-babel-esm-legacy/jest-preset.js

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+module.exports = require('..').jsWithBabelESMLegacy

frontend/node_modules/ts-jest/presets/js-with-babel-esm/jest-preset.js

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+module.exports = require('..').jsWithBabelESM

frontend/node_modules/ts-jest/presets/js-with-babel-legacy/jest-preset.js

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+module.exports = require('..').jsWithBabelLegacy

frontend/node_modules/ts-jest/presets/js-with-babel/jest-preset.js

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+module.exports = require('..').jsWithBabel

frontend/node_modules/ts-jest/presets/js-with-ts-esm-legacy/jest-preset.js

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+module.exports = require('..').jsWithTsESMLegacy

frontend/node_modules/ts-jest/presets/js-with-ts-esm/jest-preset.js

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+module.exports = require('..').jsWithTsESM

frontend/node_modules/ts-jest/presets/js-with-ts-legacy/jest-preset.js

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+module.exports = require('..').jsWithTsLegacy

frontend/node_modules/ts-jest/presets/js-with-ts/jest-preset.js

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+module.exports = require('..').jsWithTs