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/internals/ArrayInt64.js

@@ -0,0 +1,53 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.fromNumberToArrayInt64 = fromNumberToArrayInt64;
+exports.substractArrayInt64 = substractArrayInt64;
+function fromNumberToArrayInt64(out, n) {
+    if (n < 0) {
+        var posN = -n;
+        out.sign = -1;
+        out.data[0] = ~~(posN / 0x100000000);
+        out.data[1] = posN >>> 0;
+    }
+    else {
+        out.sign = 1;
+        out.data[0] = ~~(n / 0x100000000);
+        out.data[1] = n >>> 0;
+    }
+    return out;
+}
+function substractArrayInt64(out, arrayIntA, arrayIntB) {
+    var lowA = arrayIntA.data[1];
+    var highA = arrayIntA.data[0];
+    var signA = arrayIntA.sign;
+    var lowB = arrayIntB.data[1];
+    var highB = arrayIntB.data[0];
+    var signB = arrayIntB.sign;
+    out.sign = 1;
+    if (signA === 1 && signB === -1) {
+        var low_1 = lowA + lowB;
+        var high = highA + highB + (low_1 > 0xffffffff ? 1 : 0);
+        out.data[0] = high >>> 0;
+        out.data[1] = low_1 >>> 0;
+        return out;
+    }
+    var lowFirst = lowA;
+    var highFirst = highA;
+    var lowSecond = lowB;
+    var highSecond = highB;
+    if (signA === -1) {
+        lowFirst = lowB;
+        highFirst = highB;
+        lowSecond = lowA;
+        highSecond = highA;
+    }
+    var reminderLow = 0;
+    var low = lowFirst - lowSecond;
+    if (low < 0) {
+        reminderLow = 1;
+        low = low >>> 0;
+    }
+    out.data[0] = highFirst - highSecond - reminderLow;
+    out.data[1] = low;
+    return out;
+}