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/cli/helpers/presets.js

@@ -0,0 +1,41 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.jsWIthBabel = exports.jsWithTs = exports.defaults = exports.allPresets = void 0;
+const definePreset = (fullName) => ({
+    fullName,
+    get name() {
+        return this.isDefault ? 'ts-jest' : fullName;
+    },
+    get label() {
+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+        return fullName.split('/').pop();
+    },
+    get jsVarName() {
+        return this.isDefault
+            ? 'defaults'
+            : // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+                fullName
+                    .split('/')
+                    .pop()
+                    // eslint-disable-next-line no-useless-escape
+                    .replace(/\-([a-z])/g, (_, l) => l.toUpperCase());
+    },
+    get value() {
+        return require(`../../../${fullName.replace(/^ts-jest\//, '')}/jest-preset`);
+    },
+    jsImport(varName = 'tsjPreset') {
+        return `const { ${this.jsVarName}: ${varName} } = require('ts-jest/presets')`;
+    },
+    get isDefault() {
+        return fullName === "ts-jest/presets/default" /* JestPresetNames.default */;
+    },
+});
+/** @internal */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+exports.allPresets = {};
+/** @internal */
+exports.defaults = (exports.allPresets["ts-jest/presets/default" /* JestPresetNames.default */] = definePreset("ts-jest/presets/default" /* JestPresetNames.default */));
+/** @internal */
+exports.jsWithTs = (exports.allPresets["ts-jest/presets/js-with-ts" /* JestPresetNames.jsWithTs */] = definePreset("ts-jest/presets/js-with-ts" /* JestPresetNames.jsWithTs */));
+/** @internal */
+exports.jsWIthBabel = (exports.allPresets["ts-jest/presets/js-with-babel" /* JestPresetNames.jsWIthBabel */] = definePreset("ts-jest/presets/js-with-babel" /* JestPresetNames.jsWIthBabel */));