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-changed-files/README.md

@@ -0,0 +1,95 @@
+# jest-changed-files
+
+A module used internally by Jest to check which files have changed since you last committed in git or hg.
+
+## Install
+
+```sh
+$ npm install --save jest-changed-files
+```
+
+## API
+
+### `getChangedFilesForRoots(roots: Array<string>, options: Options): Promise<ChangedFiles>`
+
+Get the list of files and repos that have changed since the last commit.
+
+#### Parameters
+
+roots: Array of string paths gathered from [jest roots](https://jestjs.io/docs/configuration#roots-arraystring).
+
+options: Object literal with keys
+
+- lastCommit: boolean
+- withAncestor: boolean
+- changedSince: string
+
+### Returns
+
+A Promise of Object literal with keys
+
+- changedFiles: Set\<string>
+- repos:
+  - git: Set\<string>
+  - hg: Set\<string>
+
+### findRepos(roots: Array<string>): Promise<Repos>
+
+Get a set of git and hg repositories.
+
+#### Parameters
+
+roots: Array of string paths gathered from [jest roots](https://jestjs.io/docs/configuration#roots-arraystring).
+
+### Returns
+
+A Promise of Object literal with keys
+
+- git: Set\<string>
+- hg: Set\<string>
+
+## Usage
+
+```javascript
+import {getChangedFilesForRoots} from 'jest-changed-files';
+
+getChangedFilesForRoots(['/path/to/test'], {
+  lastCommit: true,
+  withAncestor: true,
+}).then(files => {
+  /*
+  {
+    repos: [],
+    changedFiles: []
+  }
+  */
+});
+```
+
+```javascript
+import {getChangedFilesForRoots} from 'jest-changed-files';
+
+getChangedFilesForRoots(['/path/to/test'], {
+  changedSince: 'main',
+}).then(files => {
+  /*
+  {
+    repos: [],
+    changedFiles: []
+  }
+  */
+});
+```
+
+```javascript
+import {findRepos} from 'jest-changed-files';
+
+findRepos(['/path/to/test']).then(repos => {
+  /*
+  {
+    git: Set<Path>,
+    hg: Set<Path>
+  }
+  */
+});
+```