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/tough-cookie/dist/cookie/defaultPath.d.ts

@@ -0,0 +1,40 @@
+import type { Nullable } from '../utils';
+/**
+ * Given a current request/response path, gives the path appropriate for storing
+ * in a cookie. This is basically the "directory" of a "file" in the path, but
+ * is specified by {@link https://www.rfc-editor.org/rfc/rfc6265.html#section-5.1.4 | RFC6265 - Section 5.1.4}.
+ *
+ * @remarks
+ * ### RFC6265 - Section 5.1.4
+ *
+ * The user agent MUST use an algorithm equivalent to the following algorithm to compute the default-path of a cookie:
+ *
+ * 1. Let uri-path be the path portion of the request-uri if such a
+ *     portion exists (and empty otherwise).  For example, if the
+ *     request-uri contains just a path (and optional query string),
+ *     then the uri-path is that path (without the %x3F ("?") character
+ *     or query string), and if the request-uri contains a full
+ *     absoluteURI, the uri-path is the path component of that URI.
+ *
+ * 2. If the uri-path is empty or if the first character of the uri-
+ *     path is not a %x2F ("/") character, output %x2F ("/") and skip
+ *     the remaining steps.
+ *
+ * 3. If the uri-path contains no more than one %x2F ("/") character,
+ *     output %x2F ("/") and skip the remaining step.
+ *
+ * 4. Output the characters of the uri-path from the first character up
+ *     to, but not including, the right-most %x2F ("/").
+ *
+ * @example
+ * ```
+ * defaultPath('') === '/'
+ * defaultPath('/some-path') === '/'
+ * defaultPath('/some-parent-path/some-path') === '/some-parent-path'
+ * defaultPath('relative-path') === '/'
+ * ```
+ *
+ * @param path - the path portion of the request-uri (excluding the hostname, query, fragment, and so on)
+ * @public
+ */
+export declare function defaultPath(path?: Nullable<string>): string;