fix(web): adopt authenticated scaffold URL and post-merge golden in feedback-release lane

apps/web/tests/feedback-release.e2e.ts

@@ -66,7 +66,7 @@ describe('web e2e: feedback-gated release under the shipped default mode', () =>
     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)

snapshots/web/feedback-release/ack.expected.md

@@ -9,6 +9,10 @@
   - tablist:
     - tab "Chat" [selected]
     - tab "Trajectory"
+- button "System prompt":
+  - img
+  - img
+  - text: System prompt
 - text: Reply with the single word LIGHTHOUSE and stop. {{clock}}
 - button "Copy":
   - img