feat(accounting): edit finalized document cost centres

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

@@ -1896,6 +1896,31 @@ const saveDocument = async (state, resetup = false) => {
   if (resetup) await setupPage()
 }
 
+const saveFinalizedCostCentres = async () => {
+  const rowCostCentres = itemInfo.value.rows
+      .filter(row => row?.id)
+      .map(row => ({
+        rowId: String(row.id),
+        costcentre: row.costCentre || null,
+      }))
+
+  const result = await $api(`/api/functions/outgoing-documents/${itemInfo.value.id}/cost-centres`, {
+    method: "PUT",
+    body: {
+      costcentre: itemInfo.value.costcentre || null,
+      rowCostCentres,
+    },
+  })
+
+  itemInfo.value.costcentre = result.document.costcentre
+  itemInfo.value.rows = normalizeCreatedDocumentRows(result.document.rows)
+  toast.add({
+    title: "Kostenstellen gespeichert",
+    description: "Die Kostenstellen des fertiggestellten Belegs wurden aktualisiert.",
+    color: "success",
+  })
+}
+
 const selectedTab = ref("0")
 
 const closeDocument = async () => {
@@ -2077,7 +2102,7 @@ const setRowData = async (row, service = {sellingPriceComposed: {}}, product = {
       <UButton
           icon="i-mdi-content-save"
           @click="saveDocument('Entwurf',true)"
-          v-if="itemInfo.type !== 'serialInvoices' && !isTemplateMode"
+          v-if="itemInfo.type !== 'serialInvoices' && !isTemplateMode && itemInfo.state === 'Entwurf'"
           :disabled="!itemInfo.customer"
       >
         Speichern
@@ -2092,10 +2117,17 @@ const setRowData = async (row, service = {sellingPriceComposed: {}}, product = {
       </UButton>
       <UButton
           @click="closeDocument"
-          v-if="itemInfo.id && itemInfo.type !== 'serialInvoices' && !isTemplateMode"
+          v-if="itemInfo.id && itemInfo.type !== 'serialInvoices' && !isTemplateMode && itemInfo.state === 'Entwurf'"
       >
         {{selectedTab === '0' ? "Vorschau zeigen" : "Fertigstellen"}}
       </UButton>
+      <UButton
+          icon="i-heroicons-tag"
+          @click="saveFinalizedCostCentres"
+          v-if="itemInfo.id && itemInfo.type !== 'serialInvoices' && !isTemplateMode && itemInfo.state === 'Gebucht'"
+      >
+        Kostenstellen speichern
+      </UButton>
       <UButton
           icon="i-mdi-content-save"
           @click="saveSerialInvoice"