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/dist/presets/all-presets.d.ts

@@ -0,0 +1,15 @@
+declare const allPresets: {
+    readonly defaults: import("..").DefaultPreset;
+    readonly defaultsLegacy: import("..").DefaultLegacyPreset;
+    readonly defaultsESM: import("..").DefaultEsmPreset;
+    readonly defaultsESMLegacy: import("..").DefaultEsmLegacyPreset;
+    readonly jsWithTs: import("..").JsWithTsPreset;
+    readonly jsWithTsLegacy: import("..").JsWithTsLegacyPreset;
+    readonly jsWithTsESM: import("..").JsWithTsEsmPreset;
+    readonly jsWithTsESMLegacy: import("..").JsWithTsEsmLegacyPreset;
+    readonly jsWithBabel: import("..").JsWithBabelPreset;
+    readonly jsWithBabelLegacy: import("..").JsWithBabelLegacyPreset;
+    readonly jsWithBabelESM: import("..").JsWithBabelEsmPreset;
+    readonly jsWithBabelESMLegacy: import("..").JsWithBabelEsmLegacyPreset;
+};
+export default allPresets;