Newsletter system test page

This page tests the new unified newsletter component with spam protection. It includes:

• Server-side validation via Netlify Function
• Google reCAPTCHA v3 (invisible)
• Double opt-in via Mailchimp
• Progressive enhancement (works without JavaScript)

Default variant

Full width variant

Testing instructions

1. Try submitting with a valid email - you should receive a confirmation email
2. Try submitting the same email again - should show "already subscribed" message
3. Disable JavaScript and try submitting - form should still work
4. Check browser console for reCAPTCHA loading (production only)
5. Check Netlify Functions logs for submissions