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/css.escape/LICENSE-MIT.txt

@@ -0,0 +1,20 @@
+Copyright Mathias Bynens <https://mathiasbynens.be/>
+
+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/css.escape/README.md

@@ -0,0 +1,39 @@
+# `CSS.escape` polyfill [![Build status](https://travis-ci.org/mathiasbynens/CSS.escape.svg?branch=master)](https://travis-ci.org/mathiasbynens/CSS.escape) [![Code coverage status](http://img.shields.io/coveralls/mathiasbynens/CSS.escape/master.svg)](https://coveralls.io/r/mathiasbynens/CSS.escape)
+
+A robust polyfill for [the `CSS.escape` utility method as defined in CSSOM](https://drafts.csswg.org/cssom/#the-css.escape%28%29-method).
+
+For a more powerful alternative, consider using [cssesc](https://mths.be/cssesc), which automatically takes care of excessive whitespace, and has many options to customize the output.
+
+## Installation
+
+In a browser:
+
+```html
+<script src="css.escape.js"></script>
+```
+
+Via [npm](https://www.npmjs.com/):
+
+```bash
+npm install css.escape
+```
+
+Then, in [Node.js](https://nodejs.org/):
+
+```js
+require('css.escape');
+
+// On Windows and on Mac systems with default settings, case doesn’t matter,
+// which allows you to do this instead:
+require('CSS.escape');
+```
+
+## Author
+
+| [![twitter/mathias](https://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") |
+|---|
+| [Mathias Bynens](https://mathiasbynens.be/) |
+
+## License
+
+This polyfill is available under the [MIT](https://mths.be/mit) license.

frontend/node_modules/css.escape/css.escape.js

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+/*! https://mths.be/cssescape v1.5.1 by @mathias | MIT license */
+;(function(root, factory) {
+	// https://github.com/umdjs/umd/blob/master/returnExports.js
+	if (typeof exports == 'object') {
+		// For Node.js.
+		module.exports = factory(root);
+	} else if (typeof define == 'function' && define.amd) {
+		// For AMD. Register as an anonymous module.
+		define([], factory.bind(root, root));
+	} else {
+		// For browser globals (not exposing the function separately).
+		factory(root);
+	}
+}(typeof global != 'undefined' ? global : this, function(root) {
+
+	if (root.CSS && root.CSS.escape) {
+		return root.CSS.escape;
+	}
+
+	// https://drafts.csswg.org/cssom/#serialize-an-identifier
+	var cssEscape = function(value) {
+		if (arguments.length == 0) {
+			throw new TypeError('`CSS.escape` requires an argument.');
+		}
+		var string = String(value);
+		var length = string.length;
+		var index = -1;
+		var codeUnit;
+		var result = '';
+		var firstCodeUnit = string.charCodeAt(0);
+		while (++index < length) {
+			codeUnit = string.charCodeAt(index);
+			// Note: there’s no need to special-case astral symbols, surrogate
+			// pairs, or lone surrogates.
+
+			// If the character is NULL (U+0000), then the REPLACEMENT CHARACTER
+			// (U+FFFD).
+			if (codeUnit == 0x0000) {
+				result += '\uFFFD';
+				continue;
+			}
+
+			if (
+				// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
+				// U+007F, […]
+				(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
+				// If the character is the first character and is in the range [0-9]
+				// (U+0030 to U+0039), […]
+				(index == 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
+				// If the character is the second character and is in the range [0-9]
+				// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
+				(
+					index == 1 &&
+					codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
+					firstCodeUnit == 0x002D
+				)
+			) {
+				// https://drafts.csswg.org/cssom/#escape-a-character-as-code-point
+				result += '\\' + codeUnit.toString(16) + ' ';
+				continue;
+			}
+
+			if (
+				// If the character is the first character and is a `-` (U+002D), and
+				// there is no second character, […]
+				index == 0 &&
+				length == 1 &&
+				codeUnit == 0x002D
+			) {
+				result += '\\' + string.charAt(index);
+				continue;
+			}
+
+			// If the character is not handled by one of the above rules and is
+			// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
+			// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
+			// U+005A), or [a-z] (U+0061 to U+007A), […]
+			if (
+				codeUnit >= 0x0080 ||
+				codeUnit == 0x002D ||
+				codeUnit == 0x005F ||
+				codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
+				codeUnit >= 0x0041 && codeUnit <= 0x005A ||
+				codeUnit >= 0x0061 && codeUnit <= 0x007A
+			) {
+				// the character itself
+				result += string.charAt(index);
+				continue;
+			}
+
+			// Otherwise, the escaped character.
+			// https://drafts.csswg.org/cssom/#escape-a-character
+			result += '\\' + string.charAt(index);
+
+		}
+		return result;
+	};
+
+	if (!root.CSS) {
+		root.CSS = {};
+	}
+
+	root.CSS.escape = cssEscape;
+	return cssEscape;
+
+}));

frontend/node_modules/css.escape/package.json

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+{
+	"name": "css.escape",
+	"version": "1.5.1",
+	"description": "A robust polyfill for the `CSS.escape` utility method as defined in CSSOM.",
+	"homepage": "https://mths.be/cssescape",
+	"main": "css.escape.js",
+	"keywords": [
+		"string",
+		"unicode",
+		"identifier",
+		"css",
+		"cssom",
+		"polyfill"
+	],
+	"license": "MIT",
+	"author": {
+		"name": "Mathias Bynens",
+		"url": "https://mathiasbynens.be/"
+	},
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/mathiasbynens/CSS.escape.git"
+	},
+	"bugs": "https://github.com/mathiasbynens/CSS.escape/issues",
+	"files": [
+		"LICENSE-MIT.txt",
+		"css.escape.js"
+	],
+	"scripts": {
+		"test": "node tests/tests.js",
+		"cover": "istanbul cover --report html --verbose --dir coverage tests/tests.js",
+		"coveralls": "istanbul cover --verbose --dir coverage tests/tests.js && coveralls < coverage/lcov.info; rm -rf coverage/lcov*"
+	},
+	"devDependencies": {
+		"coveralls": "^2.11.4",
+		"istanbul": "^0.4.1"
+	}
+}