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/rrweb-cssom/lib/CSSConditionRule.js

@@ -0,0 +1,25 @@
+//.CommonJS
+var CSSOM = {
+  CSSRule: require("./CSSRule").CSSRule,
+  CSSGroupingRule: require("./CSSGroupingRule").CSSGroupingRule
+};
+///CommonJS
+
+
+/**
+ * @constructor
+ * @see https://www.w3.org/TR/css-conditional-3/#the-cssconditionrule-interface
+ */
+CSSOM.CSSConditionRule = function CSSConditionRule() {
+  CSSOM.CSSGroupingRule.call(this);
+  this.cssRules = [];
+};
+
+CSSOM.CSSConditionRule.prototype = new CSSOM.CSSGroupingRule();
+CSSOM.CSSConditionRule.prototype.constructor = CSSOM.CSSConditionRule;
+CSSOM.CSSConditionRule.prototype.conditionText = ''
+CSSOM.CSSConditionRule.prototype.cssText = ''
+
+//.CommonJS
+exports.CSSConditionRule = CSSOM.CSSConditionRule;
+///CommonJS