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/tough-cookie/dist/validators.d.ts

@@ -0,0 +1,24 @@
+import { Callback } from './utils';
+/** Determines whether the argument is a non-empty string. */
+export declare function isNonEmptyString(data: unknown): boolean;
+/** Determines whether the argument is a *valid* Date. */
+export declare function isDate(data: unknown): boolean;
+/** Determines whether the argument is the empty string. */
+export declare function isEmptyString(data: unknown): boolean;
+/** Determines whether the argument is a string. */
+export declare function isString(data: unknown): boolean;
+/** Determines whether the string representation of the argument is "[object Object]". */
+export declare function isObject(data: unknown): boolean;
+/** Determines whether the argument is an integer. */
+export declare function isInteger(data: unknown): boolean;
+/**
+ * When the first argument is false, an error is created with the given message. If a callback is
+ * provided, the error is passed to the callback, otherwise the error is thrown.
+ */
+export declare function validate(bool: boolean, cbOrMessage?: Callback<never> | string, message?: string): void;
+/**
+ * Represents a validation error.
+ * @public
+ */
+export declare class ParameterError extends Error {
+}