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/utils/jsonable-value.js

@@ -0,0 +1,29 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.JsonableValue = void 0;
+const json_1 = require("./json");
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+class JsonableValue {
+    _serialized;
+    _value;
+    constructor(value) {
+        this.value = value;
+    }
+    set value(value) {
+        this._value = value;
+        this._serialized = (0, json_1.stringify)(value);
+    }
+    get value() {
+        return this._value;
+    }
+    get serialized() {
+        return this._serialized;
+    }
+    valueOf() {
+        return this._value;
+    }
+    toString() {
+        return this._serialized;
+    }
+}
+exports.JsonableValue = JsonableValue;