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/jest-circus/build/index.d.ts

@@ -0,0 +1,76 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {Circus, Global as Global_2} from '@jest/types';
+
+export declare const addEventHandler: (handler: Circus.EventHandler) => void;
+
+export declare const afterAll: THook;
+
+export declare const afterEach: THook;
+
+export declare const beforeAll: THook;
+
+export declare const beforeEach: THook;
+
+declare const _default: {
+  afterAll: THook;
+  afterEach: THook;
+  beforeAll: THook;
+  beforeEach: THook;
+  describe: {
+    (blockName: Circus.BlockNameLike, blockFn: Circus.BlockFn): void;
+    each: Global_2.EachTestFn<any>;
+    only: {
+      (blockName: Circus.BlockNameLike, blockFn: Circus.BlockFn): void;
+      each: Global_2.EachTestFn<any>;
+    };
+    skip: {
+      (blockName: Circus.BlockNameLike, blockFn: Circus.BlockFn): void;
+      each: Global_2.EachTestFn<any>;
+    };
+  };
+  it: Global_2.It;
+  test: Global_2.It;
+};
+export default _default;
+
+export declare const describe: {
+  (blockName: Circus.BlockNameLike, blockFn: Circus.BlockFn): void;
+  each: Global_2.EachTestFn<any>;
+  only: {
+    (blockName: Circus.BlockNameLike, blockFn: Circus.BlockFn): void;
+    each: Global_2.EachTestFn<any>;
+  };
+  skip: {
+    (blockName: Circus.BlockNameLike, blockFn: Circus.BlockFn): void;
+    each: Global_2.EachTestFn<any>;
+  };
+};
+
+declare type Event_2 = Circus.Event;
+export {Event_2 as Event};
+
+export declare const getState: () => Circus.State;
+
+export declare const it: Global_2.It;
+
+export declare const removeEventHandler: (handler: Circus.EventHandler) => void;
+
+export declare const resetState: () => void;
+
+export declare const run: () => Promise<Circus.RunResult>;
+
+export declare const setState: (state: Circus.State) => Circus.State;
+
+export declare type State = Circus.State;
+
+export declare const test: Global_2.It;
+
+declare type THook = (fn: Circus.HookFn, timeout?: number) => void;
+
+export {};