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/tldts/index.ts

@@ -0,0 +1,62 @@
+import {
+  FLAG,
+  getEmptyResult,
+  IOptions,
+  IResult,
+  parseImpl,
+  resetResult,
+} from 'tldts-core';
+
+import suffixLookup from './src/suffix-trie';
+
+// For all methods but 'parse', it does not make sense to allocate an object
+// every single time to only return the value of a specific attribute. To avoid
+// this un-necessary allocation, we use a global object which is re-used.
+const RESULT: IResult = getEmptyResult();
+
+export function parse(url: string, options: Partial<IOptions> = {}): IResult {
+  return parseImpl(url, FLAG.ALL, suffixLookup, options, getEmptyResult());
+}
+
+export function getHostname(
+  url: string,
+  options: Partial<IOptions> = {},
+): string | null {
+  /*@__INLINE__*/ resetResult(RESULT);
+  return parseImpl(url, FLAG.HOSTNAME, suffixLookup, options, RESULT).hostname;
+}
+
+export function getPublicSuffix(
+  url: string,
+  options: Partial<IOptions> = {},
+): string | null {
+  /*@__INLINE__*/ resetResult(RESULT);
+  return parseImpl(url, FLAG.PUBLIC_SUFFIX, suffixLookup, options, RESULT)
+    .publicSuffix;
+}
+
+export function getDomain(
+  url: string,
+  options: Partial<IOptions> = {},
+): string | null {
+  /*@__INLINE__*/ resetResult(RESULT);
+  return parseImpl(url, FLAG.DOMAIN, suffixLookup, options, RESULT).domain;
+}
+
+export function getSubdomain(
+  url: string,
+  options: Partial<IOptions> = {},
+): string | null {
+  /*@__INLINE__*/ resetResult(RESULT);
+  return parseImpl(url, FLAG.SUB_DOMAIN, suffixLookup, options, RESULT)
+    .subdomain;
+}
+
+export function getDomainWithoutSuffix(
+  url: string,
+  options: Partial<IOptions> = {},
+): string | null {
+  /*@__INLINE__*/ resetResult(RESULT);
+  return parseImpl(url, FLAG.ALL, suffixLookup, options, RESULT)
+    .domainWithoutSuffix;
+}