added expense field to incominginvoice

spaces/pages/incominginvoices/[mode]/[[id]].vue

@@ -44,6 +44,7 @@ const currentDocument = computed(() => {
 
 const itemInfo = ref({
   vendor: 0,
+  expense: true,
   reference: "",
   date:  null,
   dueDate: null,
@@ -160,6 +161,21 @@ setupPage()
       </div>
 
       <div v-else-if="mode === 'edit'" class=" scrollContainer">
+        <InputGroup class="my-3">
+          <UButton
+              :variant="itemInfo.expense ? 'solid' : 'outline'"
+            @click="itemInfo.expense = true"
+          >
+            Ausgabe
+          </UButton>
+          <UButton
+            :variant="!itemInfo.expense ? 'solid' : 'outline'"
+            @click="itemInfo.expense = false"
+          >
+            Einnahme
+          </UButton>
+        </InputGroup>
+
         <UFormGroup label="Lieferant:" required>
           <InputGroup>
             <USelectMenu