test(web): authenticate streaming fence scaffold

apps/web/tests/streaming-fence-highlight.e2e.ts

@@ -98,7 +98,7 @@ describe.skipIf(MODE === 'record')('web e2e: streaming code-fence highlighting',
     browser = await chromium.launch()
     page = await newEnglishPage(browser)
     tripwire = watchConsole(page)
-    await page.goto(scaffold.baseUrl, { waitUntil: 'load' })
+    await page.goto(scaffold.authenticatedUrl, { waitUntil: 'load' })
     await page.waitForSelector('[class*="frame"]', { timeout: 30_000 })
     await connectFreshWorkspace(page, scaffold.workspaceCwd)
   }, 120_000)