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/CSSFontFaceRule.js

@@ -0,0 +1,36 @@
+//.CommonJS
+var CSSOM = {
+	CSSStyleDeclaration: require("./CSSStyleDeclaration").CSSStyleDeclaration,
+	CSSRule: require("./CSSRule").CSSRule
+};
+///CommonJS
+
+
+/**
+ * @constructor
+ * @see http://dev.w3.org/csswg/cssom/#css-font-face-rule
+ */
+CSSOM.CSSFontFaceRule = function CSSFontFaceRule() {
+	CSSOM.CSSRule.call(this);
+	this.style = new CSSOM.CSSStyleDeclaration();
+	this.style.parentRule = this;
+};
+
+CSSOM.CSSFontFaceRule.prototype = new CSSOM.CSSRule();
+CSSOM.CSSFontFaceRule.prototype.constructor = CSSOM.CSSFontFaceRule;
+CSSOM.CSSFontFaceRule.prototype.type = 5;
+//FIXME
+//CSSOM.CSSFontFaceRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
+//CSSOM.CSSFontFaceRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;
+
+// http://www.opensource.apple.com/source/WebCore/WebCore-955.66.1/css/WebKitCSSFontFaceRule.cpp
+Object.defineProperty(CSSOM.CSSFontFaceRule.prototype, "cssText", {
+  get: function() {
+    return "@font-face {" + this.style.cssText + "}";
+  }
+});
+
+
+//.CommonJS
+exports.CSSFontFaceRule = CSSOM.CSSFontFaceRule;
+///CommonJS