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/@sinonjs/commons/lib/function-name.test.js

@@ -0,0 +1,76 @@
+"use strict";
+
+var jsc = require("jsverify");
+var refute = require("@sinonjs/referee-sinon").refute;
+
+var functionName = require("./function-name");
+
+describe("function-name", function () {
+    it("should return empty string if func is falsy", function () {
+        jsc.assertForall("falsy", function (fn) {
+            return functionName(fn) === "";
+        });
+    });
+
+    it("should use displayName by default", function () {
+        jsc.assertForall("nestring", function (displayName) {
+            var fn = { displayName: displayName };
+
+            return functionName(fn) === fn.displayName;
+        });
+    });
+
+    it("should use name if displayName is not available", function () {
+        jsc.assertForall("nestring", function (name) {
+            var fn = { name: name };
+
+            return functionName(fn) === fn.name;
+        });
+    });
+
+    it("should fallback to string parsing", function () {
+        jsc.assertForall("nat", function (naturalNumber) {
+            var name = `fn${naturalNumber}`;
+            var fn = {
+                toString: function () {
+                    return `\nfunction ${name}`;
+                },
+            };
+
+            return functionName(fn) === name;
+        });
+    });
+
+    it("should not fail when a name cannot be found", function () {
+        refute.exception(function () {
+            var fn = {
+                toString: function () {
+                    return "\nfunction (";
+                },
+            };
+
+            functionName(fn);
+        });
+    });
+
+    it("should not fail when toString is undefined", function () {
+        refute.exception(function () {
+            functionName(Object.create(null));
+        });
+    });
+
+    it("should not fail when toString throws", function () {
+        refute.exception(function () {
+            var fn;
+            try {
+                // eslint-disable-next-line no-eval
+                fn = eval("(function*() {})")().constructor;
+            } catch (e) {
+                // env doesn't support generators
+                return;
+            }
+
+            functionName(fn);
+        });
+    });
+});