fix some bugs

src/utils/weightUnit.ts

@@ -13,3 +13,17 @@ export function resolveTradeWeightUnit(settingValue?: string | number | null) {
 export function weightFieldLabelForUnit(unit?: string | null) {
   return isKilogramUnit(unit) ? 'وزن به کیلوگرم' : 'وزن به گرم'
 }
+
+export function formatAmountWithUnit(
+  value: number | null | undefined,
+  unit?: string | null,
+  decimals = 3
+): string {
+  if (value == null || Number.isNaN(Number(value))) {
+    return '-'
+  }
+
+  const resolvedUnit = (unit ?? TRADE_WEIGHT_UNIT_GRAM).trim() || TRADE_WEIGHT_UNIT_GRAM
+
+  return `${Number(Number(value).toFixed(decimals))} ${resolvedUnit}`
+}