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/import-local/fixtures/cli.js

@@ -0,0 +1,7 @@
+#!/usr/bin/env node
+'use strict';
+const importLocal = require('..');
+
+if (importLocal(__filename)) {
+	console.log('local');
+}

frontend/node_modules/import-local/index.d.ts

@@ -0,0 +1,17 @@
+/**
+Let a globally installed package use a locally installed version of itself if available.
+
+@param filePath - The absolute file path to the main file of the package.
+
+@example
+```
+import importLocal from 'import-local';
+
+if (importLocal(import.meta.url)) {
+	console.log('Using local version of this package');
+} else {
+	// Code for both global and local version here…
+}
+```
+*/
+export default function importLocal(filePath: string): boolean | undefined | unknown;

frontend/node_modules/import-local/index.js

@@ -0,0 +1,24 @@
+'use strict';
+const path = require('path');
+const {fileURLToPath} = require('url');
+const resolveCwd = require('resolve-cwd');
+const pkgDir = require('pkg-dir');
+
+module.exports = filename => {
+	const normalizedFilename = filename.startsWith('file://') ? fileURLToPath(filename) : filename;
+	const globalDir = pkgDir.sync(path.dirname(normalizedFilename));
+	const relativePath = path.relative(globalDir, normalizedFilename);
+	const pkg = require(path.join(globalDir, 'package.json'));
+	const localFile = resolveCwd.silent(path.join(pkg.name, relativePath));
+	const localNodeModules = path.join(process.cwd(), 'node_modules');
+
+	const filenameInLocalNodeModules = !path.relative(localNodeModules, normalizedFilename).startsWith('..') &&
+		// On Windows, if `localNodeModules` and `normalizedFilename` are on different partitions, `path.relative()` returns the value of `normalizedFilename`, resulting in `filenameInLocalNodeModules` incorrectly becoming `true`.
+		path.parse(localNodeModules).root === path.parse(normalizedFilename).root;
+
+	// Use `path.relative()` to detect local package installation,
+	// because __filename's case is inconsistent on Windows
+	// Can use `===` when targeting Node.js 8
+	// See https://github.com/nodejs/node/issues/6624
+	return !filenameInLocalNodeModules && localFile && path.relative(localFile, normalizedFilename) !== '' && require(localFile);
+};

frontend/node_modules/import-local/license

@@ -0,0 +1,9 @@
+MIT License
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

frontend/node_modules/import-local/package.json

@@ -0,0 +1,54 @@
+{
+	"name": "import-local",
+	"version": "3.2.0",
+	"description": "Let a globally installed package use a locally installed version of itself if available",
+	"license": "MIT",
+	"repository": "sindresorhus/import-local",
+	"funding": "https://github.com/sponsors/sindresorhus",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "https://sindresorhus.com"
+	},
+	"bin": {
+		"import-local-fixture": "fixtures/cli.js"
+	},
+	"sideEffects": false,
+	"engines": {
+		"node": ">=8"
+	},
+	"scripts": {
+		"test": "xo && ava"
+	},
+	"files": [
+		"index.js",
+		"index.d.ts",
+		"fixtures/cli.js"
+	],
+	"keywords": [
+		"import",
+		"local",
+		"require",
+		"resolve",
+		"global",
+		"version",
+		"prefer",
+		"cli"
+	],
+	"dependencies": {
+		"pkg-dir": "^4.2.0",
+		"resolve-cwd": "^3.0.0"
+	},
+	"devDependencies": {
+		"ava": "2.1.0",
+		"cpy": "^7.0.1",
+		"del": "^4.1.1",
+		"execa": "^2.0.1",
+		"xo": "^0.24.0"
+	},
+	"xo": {
+		"ignores": [
+			"fixtures"
+		]
+	}
+}

frontend/node_modules/import-local/readme.md

@@ -0,0 +1,25 @@
+# import-local
+
+> Let a globally installed package use a locally installed version of itself if available
+
+Useful for CLI tools that want to defer to the user's locally installed version when available, but still work if it's not installed locally. For example, [AVA](https://avajs.dev) and [XO](https://github.com/xojs/xo) uses this method.
+
+## Install
+
+```sh
+npm install import-local
+```
+
+## Usage
+
+```js
+import importLocal from 'import-local';
+
+if (importLocal(import.meta.url)) {
+	console.log('Using local version of this package');
+} else {
+	// Code for both global and local version here…
+}
+```
+
+You can also pass in `__filename` when used in a CommonJS context.