- Add contact.php (was 404, linked from footer and returns page)
- Add shippingDetails and hasMerchantReturnPolicy to product schema
- Add priceValidUntil to product Offer schema
- Improve merchant feed descriptions (use DB description when present)
- Add handling/transit times and return_policy_label to feed
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
