test(ci): add exporter heading levels and a11y typography smoke; update MAIN_PLAN

components/BuilderClientPage.seoHelp.test.tsx

@@ -0,0 +1,29 @@
+import { render, screen } from '@testing-library/react'
+import { NextIntlClientProvider } from 'next-intl'
+import { describe, expect, test } from 'vitest'
+import BuilderClientPage from './BuilderClientPage'
+import messages from '../messages/en.json'
+
+function Wrapper({ children }: { children: React.ReactNode }) {
+  return (
+    <NextIntlClientProvider messages={messages} locale="en">
+      {children}
+    </NextIntlClientProvider>
+  )
+}
+
+describe('BuilderClientPage - SEO/Analytics helptexts', () => {
+  test('renders helpful hints under SEO/Analytics/OG inputs', () => {
+    render(
+      <Wrapper>
+        <BuilderClientPage />
+      </Wrapper>
+    )
+
+    expect(screen.getByText(/Shown in browser title and social previews/i)).toBeInTheDocument()
+    expect(screen.getByText(/Used by search engines and OG description/i)).toBeInTheDocument()
+    expect(screen.getByText(/Absolute URL recommended/i)).toBeInTheDocument()
+    expect(screen.getByText(/Format: G-XXXXXXXXXX/i)).toBeInTheDocument()
+    expect(screen.getByText(/Numeric Page ID/i)).toBeInTheDocument()
+  })
+})