Leeren individuellen Aufschlag normalisieren

frontend/pages/createDocument/edit/[[id]].vue

@@ -1701,6 +1701,7 @@ const saveSerialInvoice = async () => {
 const saveDocument = async (state, resetup = false) => {
 
   itemInfo.value.state = state
+  normalizeCustomSurchargePercentage()
 
   if (state !== "Entwurf") {
     console.log("???")
@@ -1870,7 +1871,14 @@ const checkCompatibilityWithInputPrice = () => {
   })
 }
 
+const normalizeCustomSurchargePercentage = () => {
+  const percentage = Number(itemInfo.value.customSurchargePercentage)
+  itemInfo.value.customSurchargePercentage = Number.isFinite(percentage) ? percentage : 0
+}
+
 const updateCustomSurcharge = () => {
+  normalizeCustomSurchargePercentage()
+
   itemInfo.value.rows.forEach(row => {
     if (!["pagebreak", "title", "text"].includes(row.mode) && isImportedAdvanceInvoiceRow(row)) {
       row.price = Number(row.inputPrice || 0)