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/entities/readme.md

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+# entities [![NPM version](https://img.shields.io/npm/v/entities.svg)](https://npmjs.org/package/entities) [![Downloads](https://img.shields.io/npm/dm/entities.svg)](https://npmjs.org/package/entities) [![Node.js CI](https://github.com/fb55/entities/actions/workflows/nodejs-test.yml/badge.svg)](https://github.com/fb55/entities/actions/workflows/nodejs-test.yml)
+
+Encode & decode HTML & XML entities with ease & speed.
+
+## Features
+
+- 😇 Tried and true: `entities` is used by many popular libraries; eg.
+  [`htmlparser2`](https://github.com/fb55/htmlparser2), the official
+  [AWS SDK](https://github.com/aws/aws-sdk-js-v3) and
+  [`commonmark`](https://github.com/commonmark/commonmark.js) use it to process
+  HTML entities.
+- ⚡️ Fast: `entities` is the fastest library for decoding HTML entities (as of
+  April 2022); see [performance](#performance).
+- 🎛 Configurable: Get an output tailored for your needs. You are fine with
+  UTF8? That'll save you some bytes. Prefer to only have ASCII characters? We
+  can do that as well!
+
+## How to…
+
+### …install `entities`
+
+    npm install entities
+
+### …use `entities`
+
+```javascript
+const entities = require("entities");
+
+// Encoding
+entities.escapeUTF8("& ü"); // "& ü"
+entities.encodeXML("& ü"); // "& ü"
+entities.encodeHTML("& ü"); // "& ü"
+
+// Decoding
+entities.decodeXML("asdf & ÿ ü '"); // "asdf & ÿ ü '"
+entities.decodeHTML("asdf & ÿ ü '"); // "asdf & ÿ ü '"
+```
+
+## Performance
+
+This is how `entities` compares to other libraries on a very basic benchmark
+(see `scripts/benchmark.ts`, for 10,000,000 iterations; **lower is better**):
+
+| Library        | Version | `decode` perf | `encode` perf | `escape` perf |
+| -------------- | ------- | ------------- | ------------- | ------------- |
+| entities       | `3.0.1` | 1.418s        | 6.786s        | 2.196s        |
+| html-entities  | `2.3.2` | 2.530s        | 6.829s        | 2.415s        |
+| he             | `1.2.0` | 5.800s        | 24.237s       | 3.624s        |
+| parse-entities | `3.0.0` | 9.660s        | N/A           | N/A           |
+
+---
+
+## FAQ
+
+> What methods should I actually use to encode my documents?
+
+If your target supports UTF-8, the `escapeUTF8` method is going to be your best
+choice. Otherwise, use either `encodeHTML` or `encodeXML` based on whether
+you're dealing with an HTML or an XML document.
+
+You can have a look at the options for the `encode` and `decode` methods to see
+everything you can configure.
+
+> When should I use strict decoding?
+
+When strict decoding, entities not terminated with a semicolon will be ignored.
+This is helpful for decoding entities in legacy environments.
+
+> Why should I use `entities` instead of alternative modules?
+
+As of April 2022, `entities` is a bit faster than other modules. Still, this is
+not a very differentiated space and other modules can catch up.
+
+**More importantly**, you might already have `entities` in your dependency graph
+(as a dependency of eg. `cheerio`, or `htmlparser2`), and including it directly
+might not even increase your bundle size. The same is true for other entity
+libraries, so have a look through your `node_modules` directory!
+
+> Does `entities` support tree shaking?
+
+Yes! `entities` ships as both a CommonJS and a ES module. Note that for best
+results, you should not use the `encode` and `decode` functions, as they wrap
+around a number of other functions, all of which will remain in the bundle.
+Instead, use the functions that you need directly.
+
+---
+
+## Acknowledgements
+
+This library wouldn't be possible without the work of these individuals. Thanks
+to
+
+- [@mathiasbynens](https://github.com/mathiasbynens) for his explanations about
+  character encodings, and his library `he`, which was one of the inspirations
+  for `entities`
+- [@inikulin](https://github.com/inikulin) for his work on optimized tries for
+  decoding HTML entities for the `parse5` project
+- [@mdevils](https://github.com/mdevils) for taking on the challenge of
+  producing a quick entity library with his `html-entities` library. `entities`
+  would be quite a bit slower if there wasn't any competition. Right now
+  `entities` is on top, but we'll see how long that lasts!
+
+---
+
+License: BSD-2-Clause
+
+## Security contact information
+
+To report a security vulnerability, please use the
+[Tidelift security contact](https://tidelift.com/security). Tidelift will
+coordinate the fix and disclosure.
+
+## `entities` for enterprise
+
+Available as part of the Tidelift Subscription
+
+The maintainers of `entities` and thousands of other packages are working with
+Tidelift to deliver commercial support and maintenance for the open source
+dependencies you use to build your applications. Save time, reduce risk, and
+improve code health, while paying the maintainers of the exact dependencies you
+use.
+[Learn more.](https://tidelift.com/subscription/pkg/npm-entities?utm_source=npm-entities&utm_medium=referral&utm_campaign=enterprise&utm_term=repo)