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/pure-rand/lib/distribution/UnsafeUniformArrayIntDistribution.js

@@ -0,0 +1,11 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.unsafeUniformArrayIntDistribution = unsafeUniformArrayIntDistribution;
+var ArrayInt_1 = require("./internals/ArrayInt");
+var UnsafeUniformArrayIntDistributionInternal_1 = require("./internals/UnsafeUniformArrayIntDistributionInternal");
+function unsafeUniformArrayIntDistribution(from, to, rng) {
+    var rangeSize = (0, ArrayInt_1.trimArrayIntInplace)((0, ArrayInt_1.addOneToPositiveArrayInt)((0, ArrayInt_1.substractArrayIntToNew)(to, from)));
+    var emptyArrayIntData = rangeSize.data.slice(0);
+    var g = (0, UnsafeUniformArrayIntDistributionInternal_1.unsafeUniformArrayIntDistributionInternal)(emptyArrayIntData, rangeSize.data, rng);
+    return (0, ArrayInt_1.trimArrayIntInplace)((0, ArrayInt_1.addArrayIntToNew)({ sign: 1, data: g }, from));
+}