fix(documents): restrict advance invoice creation to projects

frontend/components/copyCreatedDocumentModal.vue

@@ -18,9 +18,9 @@ const props = defineProps({
 
 const emit = defineEmits(["updateNeeded","returnData"])
 
-const documentTypeToUse = ref(props.type)
+const documentTypeToUse = ref(props.type === 'advanceInvoices' ? null : props.type)
 const documentTypeItems = computed(() => {
-  return Object.keys(dataStore.documentTypesForCreation).map((key) => ({
+  return Object.keys(dataStore.documentTypesForCreation).filter(key => key !== 'advanceInvoices').map((key) => ({
     ...dataStore.documentTypesForCreation[key],
     key
   }))
@@ -83,6 +83,8 @@ const mappings = ref({
 })
 
 const startImport = () => {
+  if (!selectedDocumentType.value) return
+
   router.push(`/createDocument/edit/?createddocument=${props.id}&type=${documentTypeToUse.value}&optionsToImport=${encodeURIComponent(JSON.stringify(optionsToImport.value))}`)
   modal.close()
 }
@@ -147,7 +149,7 @@ const startImport = () => {
           <UButton color="neutral" variant="ghost" @click="modal.close()">
             Abbrechen
           </UButton>
-          <UButton @click="startImport">
+          <UButton :disabled="!selectedDocumentType" @click="startImport">
             Kopieren
           </UButton>
         </div>