Newsletter recommendations tweaks, add enter to blur on validation table

inventory-server/src/routes/newsletter.js

@@ -31,13 +31,14 @@ const CATEGORY_FILTERS = {
   back_in_stock:  "AND is_back_in_stock = true",
   bestsellers:    "AND shop_score > 20 AND COALESCE(current_stock, 0) > 0 AND COALESCE(sales_30d, 0) > 0",
   never_featured: "AND times_featured IS NULL AND line_last_featured_at IS NULL",
+  no_interest:    "AND COALESCE(total_sold, 0) = 0 AND COALESCE(current_stock, 0) > 0 AND COALESCE(date_online, product_created_at) <= CURRENT_DATE - INTERVAL '30 days'",
 };
 
 function buildScoredCTE({ forCount = false } = {}) {
   // forCount=true returns minimal columns for COUNT(*)
   const selectColumns = forCount ? `
           p.pid,
-          p.created_at,
+          p.created_at as product_created_at,
           p.date_online,
           p.shop_score,
           p.preorder_count,