Gebuchte Eingangsbelege bearbeitbar machen

frontend/pages/incomingInvoices/[mode]/[id].vue

@@ -49,6 +49,11 @@ const loadedFileId = ref(null)
 const invoiceFiles = ref([])
 const paymentTypeItems = ['Überweisung', 'Lastschrift', 'Kreditkarte', 'PayPal', 'Bar', 'Sonstiges']
 const files = useFiles()
+const hasActiveBankAssignmentIn = (allocations = []) => allocations.some((allocation) => {
+  if (allocation?.archived) return false
+
+  return Boolean(allocation?.bankstatement || allocation?.bs_id)
+})
 
 const setup = async () => {
   // 1. Daten laden
@@ -65,6 +70,18 @@ const setup = async () => {
     accounts: normalizeIncomingInvoiceAccounts(invoiceData.accounts || [], invoiceData.date)
   }
 
+  if (mode.value === "edit" && invoiceData.state === "Gebucht" && (invoiceData.archived || hasActiveBankAssignmentIn(invoiceData.statementallocations))) {
+    toast.add({
+      title: "Bearbeiten nicht möglich",
+      description: invoiceData.archived
+          ? "Archivierte Eingangsbelege können nicht bearbeitet werden."
+          : "Der Eingangsbeleg ist bereits einer Bankbuchung zugewiesen.",
+      color: "error"
+    })
+    await navigateTo(`/incomingInvoices/show/${invoiceData.id}`)
+    return
+  }
+
   // Fallback Accounts
   if(itemInfo.value.accounts.length === 0) {
     itemInfo.value.accounts.push(createIncomingInvoiceAccount({ depreciationStartDate: itemInfo.value.date || null }))
@@ -150,16 +167,19 @@ const bankBookingDateLabel = computed(() => {
 
   return bankBookingDates.value.map(formatDate).join(", ")
 })
-const hasActiveBankAssignment = computed(() => (itemInfo.value.statementallocations || []).some((allocation) => {
-  if (allocation?.archived) return false
-
-  return Boolean(allocation?.bankstatement || allocation?.bs_id)
-}))
+const hasActiveBankAssignment = computed(() => hasActiveBankAssignmentIn(itemInfo.value.statementallocations))
+const isBookedIncomingInvoice = computed(() => itemInfo.value.state === "Gebucht")
+const canEditIncomingInvoice = computed(() => (
+    mode.value === "show"
+    && isBookedIncomingInvoice.value
+    && !itemInfo.value.archived
+    && !hasActiveBankAssignment.value
+))
 const canArchiveIncomingInvoice = computed(() => {
   if (itemInfo.value.archived) return false
-  if (mode.value !== "show") return true
+  if (isBookedIncomingInvoice.value) return !hasActiveBankAssignment.value
 
-  return itemInfo.value.state === "Gebucht" && !hasActiveBankAssignment.value
+  return mode.value !== "show"
 })
 const vendorName = computed(() => vendors.value.find((vendor) => vendor.id === itemInfo.value.vendor)?.name || "-")
 const eInvoiceValidation = computed(() => itemInfo.value.eInvoiceValidation || null)
@@ -259,7 +279,9 @@ const applyTotalTaxOverride = () => {
 
 // --- Saving ---
 const updateIncomingInvoice = async (setBooked = false) => {
-  if (setBooked && hasBlockingIncomingInvoiceErrors.value) {
+  const keepBooked = setBooked || isBookedIncomingInvoice.value
+
+  if (keepBooked && hasBlockingIncomingInvoiceErrors.value) {
     toast.add({
       title: "Buchen nicht möglich",
       description: "Bitte beheben Sie zuerst die rot markierten Pflichtfehler.",
@@ -271,7 +293,7 @@ const updateIncomingInvoice = async (setBooked = false) => {
   let item = { ...itemInfo.value }
   item.accounts = (item.accounts || []).map((account) => ensureDepreciationDefaults({ ...account }, item.date))
   delete item.files
-  item.state = setBooked ? "Gebucht" : "Entwurf"
+  item.state = keepBooked ? "Gebucht" : "Entwurf"
 
   await useEntities('incominginvoices').update(itemInfo.value.id, item, !setBooked)
 
@@ -332,6 +354,14 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
       </h1>
     </template>
     <template #right>
+      <UButton
+          v-if="canEditIncomingInvoice"
+          icon="i-heroicons-pencil-square"
+          variant="outline"
+          @click="navigateTo(`/incomingInvoices/edit/${route.params.id}`)"
+      >
+        Bearbeiten
+      </UButton>
       <ArchiveButton
           v-if="canArchiveIncomingInvoice"
           color="error"
@@ -343,7 +373,7 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
         Speichern
       </UButton>
       <UButton
-          v-if="mode !== 'show'"
+          v-if="mode !== 'show' && !isBookedIncomingInvoice"
           @click="updateIncomingInvoice(true)"
           :disabled="hasBlockingIncomingInvoiceErrors"
       >