fix: auto-sync and replace legacy random SKUs with TRDX-[cat]-[mid]-[seq] standard in AddProduct

src/pages/dashboard/AddProductPage.tsx

@@ -235,6 +235,16 @@ export const AddProductPage: React.FC = () => {
     }
   }, [editProduct]);
 
+  // Synchronize SKU with Category, Seller MID, and Catalog sequence
+  useEffect(() => {
+    const isLegacyOrEmpty = !sku || /^TRDX-\d{4,6}$/.test(sku) || sku.startsWith('TRDX-GEN-');
+    if (!editProduct || isLegacyOrEmpty) {
+      if (category) {
+        setSku(generateTradhoxSku(sellerMid, category, nextProductSeq));
+      }
+    }
+  }, [category, sellerMid, nextProductSeq]);
+
   const craftTypes = category ? (CRAFT_TYPES[category] || []) : [];
   const clusters   = category ? (CLUSTERS[category]    || []) : [];
 
@@ -341,7 +351,11 @@ export const AddProductPage: React.FC = () => {
     try {
       const activeSupportingImages = supportingImages.filter(img => img && img.trim().length > 0);
       const productPayload: any = {
-        sku: (sku && sku.trim()) ? sku.trim().toUpperCase() : generateTradhoxSku(sellerMid, category, nextProductSeq),
+        sku: (() => {
+          const trimmed = (sku || '').trim().toUpperCase();
+          const isLegacy = !trimmed || /^TRDX-\d{4,6}$/.test(trimmed) || trimmed.startsWith('TRDX-GEN-');
+          return isLegacy ? generateTradhoxSku(sellerMid, category, nextProductSeq) : trimmed;
+        })(),
         title: title || 'Authentic Handcrafted Item',
         category: category || 'Handicrafts & Art',
         description: story || `${title} - Handcrafted ${category}`,