Added Error Blocking in Invoice Creation

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

@@ -46,17 +46,7 @@ const itemInfo = ref({
   contactEMail: null,
 })
 
-const tabItems = computed(() => {
+
-  return [
-    {
-      label: "Editor"
-    },
-    {
-      label: "Vorschau",
-      disabled: !itemInfo.value.customer || !itemInfo.value.letterhead
-    }
-  ]
-})
 
 const letterheads = ref([])
 
@@ -284,6 +274,18 @@ const findDocumentErrors = computed(() => {
   return errors
 })
 
+const tabItems = computed(() => {
+  return [
+    {
+      label: "Editor"
+    },
+    {
+      label: "Vorschau",
+      disabled: findDocumentErrors.value.filter(i => i.type === 'breaking').length > 0
+    }
+  ]
+})
+
 const documentTotal = computed(() => {
   let totalNet = 0
   let total19 = 0