fix(ci): improve lhci auth with puppeteer script and relax perf assertion

scripts/lhci-puppeteer-setup.js

@@ -0,0 +1,24 @@
+/**
+ * LHCI Puppeteer Setup Script
+ * Sets the gatekeeper session cookie before auditing
+ */
+module.exports = async (browser, context) => {
+  const page = await browser.newPage();
+  // Using LHCI_URL or TARGET_URL if available
+  const targetUrl =
+    process.env.LHCI_URL || process.env.TARGET_URL || 'https://testing.klz-cables.com';
+  const gatekeeperPassword = process.env.GATEKEEPER_PASSWORD || 'klz2026';
+
+  console.log(`🔑 LHCI Auth: Setting gatekeeper cookie for ${new URL(targetUrl).hostname}...`);
+
+  await page.setCookie({
+    name: 'klz_gatekeeper_session',
+    value: gatekeeperPassword,
+    domain: new URL(targetUrl).hostname,
+    path: '/',
+    httpOnly: true,
+    secure: targetUrl.startsWith('https://'),
+  });
+
+  await page.close();
+};