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/https-proxy-agent/dist/parse-proxy-response.js

@@ -0,0 +1,101 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.parseProxyResponse = void 0;
+const debug_1 = __importDefault(require("debug"));
+const debug = (0, debug_1.default)('https-proxy-agent:parse-proxy-response');
+function parseProxyResponse(socket) {
+    return new Promise((resolve, reject) => {
+        // we need to buffer any HTTP traffic that happens with the proxy before we get
+        // the CONNECT response, so that if the response is anything other than an "200"
+        // response code, then we can re-play the "data" events on the socket once the
+        // HTTP parser is hooked up...
+        let buffersLength = 0;
+        const buffers = [];
+        function read() {
+            const b = socket.read();
+            if (b)
+                ondata(b);
+            else
+                socket.once('readable', read);
+        }
+        function cleanup() {
+            socket.removeListener('end', onend);
+            socket.removeListener('error', onerror);
+            socket.removeListener('readable', read);
+        }
+        function onend() {
+            cleanup();
+            debug('onend');
+            reject(new Error('Proxy connection ended before receiving CONNECT response'));
+        }
+        function onerror(err) {
+            cleanup();
+            debug('onerror %o', err);
+            reject(err);
+        }
+        function ondata(b) {
+            buffers.push(b);
+            buffersLength += b.length;
+            const buffered = Buffer.concat(buffers, buffersLength);
+            const endOfHeaders = buffered.indexOf('\r\n\r\n');
+            if (endOfHeaders === -1) {
+                // keep buffering
+                debug('have not received end of HTTP headers yet...');
+                read();
+                return;
+            }
+            const headerParts = buffered
+                .slice(0, endOfHeaders)
+                .toString('ascii')
+                .split('\r\n');
+            const firstLine = headerParts.shift();
+            if (!firstLine) {
+                socket.destroy();
+                return reject(new Error('No header received from proxy CONNECT response'));
+            }
+            const firstLineParts = firstLine.split(' ');
+            const statusCode = +firstLineParts[1];
+            const statusText = firstLineParts.slice(2).join(' ');
+            const headers = {};
+            for (const header of headerParts) {
+                if (!header)
+                    continue;
+                const firstColon = header.indexOf(':');
+                if (firstColon === -1) {
+                    socket.destroy();
+                    return reject(new Error(`Invalid header from proxy CONNECT response: "${header}"`));
+                }
+                const key = header.slice(0, firstColon).toLowerCase();
+                const value = header.slice(firstColon + 1).trimStart();
+                const current = headers[key];
+                if (typeof current === 'string') {
+                    headers[key] = [current, value];
+                }
+                else if (Array.isArray(current)) {
+                    current.push(value);
+                }
+                else {
+                    headers[key] = value;
+                }
+            }
+            debug('got proxy server response: %o %o', firstLine, headers);
+            cleanup();
+            resolve({
+                connect: {
+                    statusCode,
+                    statusText,
+                    headers,
+                },
+                buffered,
+            });
+        }
+        socket.on('error', onerror);
+        socket.on('end', onend);
+        read();
+    });
+}
+exports.parseProxyResponse = parseProxyResponse;
+//# sourceMappingURL=parse-proxy-response.js.map