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/legacy/ts-jest-transformer.d.ts

@@ -0,0 +1,28 @@
+import type { SyncTransformer, TransformedSource } from '@jest/transform';
+import type { CompilerInstance, TsJestTransformerOptions, TsJestTransformOptions } from '../types';
+import { ConfigSet } from './config/config-set';
+export declare class TsJestTransformer implements SyncTransformer<TsJestTransformerOptions> {
+    private readonly transformerOptions?;
+    private readonly _logger;
+    protected _compiler: CompilerInstance;
+    private _transformCfgStr;
+    private _depGraphs;
+    private _watchMode;
+    constructor(transformerOptions?: TsJestTransformerOptions | undefined);
+    private _configsFor;
+    protected _createConfigSet(config: TsJestTransformOptions['config'] | undefined): ConfigSet;
+    protected _createCompiler(configSet: ConfigSet, cacheFS: Map<string, string>): void;
+    process(sourceText: string, sourcePath: string, transformOptions: TsJestTransformOptions): TransformedSource;
+    processAsync(sourceText: string, sourcePath: string, transformOptions: TsJestTransformOptions): Promise<TransformedSource>;
+    private processWithTs;
+    private runTsJestHook;
+    /**
+     * Jest uses this to cache the compiled version of a file
+     *
+     * @see https://github.com/facebook/jest/blob/v23.5.0/packages/jest-runtime/src/script_transformer.js#L61-L90
+     *
+     * @public
+     */
+    getCacheKey(fileContent: string, filePath: string, transformOptions: TsJestTransformOptions): string;
+    getCacheKeyAsync(sourceText: string, sourcePath: string, transformOptions: TsJestTransformOptions): Promise<string>;
+}