barcode: fix barcode value in cleaner way

packages/nc-gui/components/virtual-cell/barcode/Barcode.vue

@@ -7,14 +7,9 @@ const cellValue = inject(CellValueInj)
 
 const column = inject(ColumnInj)
 
-const barcodeValue = computed(() => {
-  if (cellValue?.value === undefined) {
-    return undefined
-  }
-  return String(cellValue.value)
-})
+const barcodeValue: ComputedRef<string> = computed(() => String(cellValue?.value || ''))
 
-const tooManyCharsForBarcode = computed(() => barcodeValue?.value?.length > maxNumberOfAllowedCharsForBarcodeValue)
+const tooManyCharsForBarcode = computed(() => barcodeValue.value.length > maxNumberOfAllowedCharsForBarcodeValue)
 
 const modalVisible = ref(false)
 
@@ -31,9 +26,7 @@ const barcodeMeta = $computed(() => {
 
 const handleModalOkClick = () => (modalVisible.value = false)
 
-const showBarcode = computed(() => {
-  return barcodeValue && barcodeValue?.value?.length > 0 && !tooManyCharsForBarcode.value
-})
+const showBarcode = computed(() => barcodeValue?.value.length > 0 && !tooManyCharsForBarcode.value)
 
 const { showEditNonEditableFieldWarning, showClearNonEditableFieldWarning } = useShowNotEditableWarning()
 </script>