Implement warehouse/lot pricing updates and configurator performance fixes

web/templates/pricelist_detail.html

@@ -169,6 +169,16 @@
         return qty.toLocaleString('ru-RU', { minimumFractionDigits: 0, maximumFractionDigits: 3 });
     }
 
+    function escapeHtml(text) {
+        if (text === null || text === undefined) return '';
+        return String(text)
+            .replace(/&/g, '&')
+            .replace(/</g, '&lt;')
+            .replace(/>/g, '&gt;')
+            .replace(/"/g, '&quot;')
+            .replace(/'/g, '&#039;');
+    }
+
     function formatPriceSettings(item) {
         // Format price settings to match admin pricing interface style
         let settings = [];