fix

apps/api/internal/processing/normalize.go

@@ -228,7 +228,38 @@ func isDimensionKey(key string) bool {
 
 func isZeroishString(s string) bool {
 	s = strings.TrimSpace(strings.ToLower(s))
-	return s == "0" || s == "0.0" || s == "0,0" || s == "0.00"
+	if s == "" {
+		return false
+	}
+	if s == "0" || s == "0.0" || s == "0,0" || s == "0.00" {
+		return true
+	}
+	// Strip common unit suffixes (m, cm, mm, kg, g) then re-check numeric zero.
+	trimmed := s
+	for _, u := range []string{"kg", "cm", "mm", "g", "m"} {
+		if strings.HasSuffix(trimmed, u) {
+			trimmed = strings.TrimSpace(strings.TrimSuffix(trimmed, u))
+			break
+		}
+	}
+	trimmed = strings.ReplaceAll(trimmed, " ", "")
+	if trimmed == "" {
+		return false
+	}
+	// 0 / 0.0 / 0,00 / 0.0000 / 0,0000
+	onlyZero := true
+	sawDigit := false
+	for _, r := range trimmed {
+		switch r {
+		case '0':
+			sawDigit = true
+		case '.', ',':
+			continue
+		default:
+			onlyZero = false
+		}
+	}
+	return onlyZero && sawDigit
 }
 
 func isEmptyValue(v any) bool {