Fail public deploy QA on runtime errors

scripts/verify-public-deploy.mjs

@@ -13,9 +13,21 @@ const browser = await chromium.launch({ headless: true });
 try {
   const page = await browser.newPage({ viewport: { width: 1280, height: 720 } });
   const consoleMessages = [];
+  const pageErrors = [];
+  const requestFailures = [];
   page.on('console', (message) => {
     consoleMessages.push({ type: message.type(), text: message.text() });
   });
+  page.on('pageerror', (error) => {
+    pageErrors.push(error.message);
+  });
+  page.on('requestfailed', (request) => {
+    requestFailures.push({
+      url: request.url(),
+      type: request.resourceType(),
+      failure: request.failure()?.errorText ?? 'unknown'
+    });
+  });
 
   await page.goto(targetUrl, { waitUntil: 'domcontentloaded', timeout: 90000 });
   await page.waitForFunction(() => document.querySelector('canvas') !== null, undefined, { timeout: 90000 });
@@ -50,6 +62,8 @@ try {
     (message) => message.type === 'error' || (isWarning(message.type) && relevantLogPattern.test(message.text))
   );
   assert(relevantLogs.length === 0, `Unexpected public deploy console issues: ${JSON.stringify(relevantLogs, null, 2)}`);
+  assert(pageErrors.length === 0, `Unexpected public deploy page errors: ${JSON.stringify(pageErrors, null, 2)}`);
+  assert(requestFailures.length === 0, `Unexpected public deploy request failures: ${JSON.stringify(requestFailures, null, 2)}`);
 
   console.log(`Verified public deploy at ${targetUrl}`);
   console.log(`Captured ${screenshotPath}`);