fix

apps/api/internal/processing/steps.go

@@ -75,8 +75,9 @@ func (e *Engine) RunSteps(ctx context.Context, companyID string, in ProductInput
 				}
 			}
 			attrs = parsed
-			out.Attributes = attrs
-			out.ProcessedAttributes = attrs
+			out.Attributes = SanitizeProductAttributes(attrs)
+			out.ProcessedAttributes = out.Attributes
+			attrs = out.Attributes
 			out.FieldSources["attributes"] = "specifications"
 			appendStepLog(out.GPTResponse, StepParseSpecs, map[string]any{
 				"count": len(attrs),
@@ -100,12 +101,15 @@ func (e *Engine) RunSteps(ctx context.Context, companyID string, in ProductInput
 				in.Description,
 			)
 			out.Category = stringFromAny(normalized["category"])
-			// Promote filled scalar fields into attributes when useful
-			promote := []string{"brand", "width", "height", "depth", "weight", "gtin", "stock_status"}
+			// Promote characteristic fields only — never core product identity/content
+			// (those belong on the V1 item root: title, description, ean, images, …).
+			promote := []string{"brand", "width", "height", "depth", "weight", "product_model", "warranty"}
 			for _, f := range in.StandardFields {
-				if f.Key != "" {
-					promote = append(promote, f.Key)
+				k := strings.TrimSpace(f.Key)
+				if k == "" || isReservedProductKey(k) || isInvalidAttributeKey(k) {
+					continue
 				}
+				promote = append(promote, k)
 			}
 			seen := map[string]bool{}
 			for _, k := range promote {
@@ -120,6 +124,7 @@ func (e *Engine) RunSteps(ctx context.Context, companyID string, in ProductInput
 					out.FieldSources[k] = "fill_fields"
 				}
 			}
+			attrs = SanitizeProductAttributes(attrs)
 			out.Attributes = attrs
 			out.ProcessedAttributes = attrs
 			appendStepLog(out.GPTResponse, StepFillFields, map[string]any{
@@ -411,7 +416,9 @@ func (e *Engine) RunSteps(ctx context.Context, companyID string, in ProductInput
 	if out.Attributes == nil {
 		out.Attributes = map[string]any{}
 	}
-	if out.ProcessedAttributes == nil {
+	out.Attributes = SanitizeProductAttributes(out.Attributes)
+	out.ProcessedAttributes = SanitizeProductAttributes(out.ProcessedAttributes)
+	if len(out.ProcessedAttributes) == 0 {
 		out.ProcessedAttributes = out.Attributes
 	}
 	if out.AIProviderMode == "" {