fix undefined errors for moveUP and moveDown functions in authors and identifiers screen

Author: fdiblen

src/components/IdentifierCardEditing.vue

@@ -105,7 +105,7 @@ export default defineComponent({
             default: 0
         }
     },
-    setup (props) {
+    setup () {
         // validating of value depends on type
         // const valueValidators: Record<IdentifierTypeType, (val: unknown) => true | string > = {
         //     doi: makeFieldValidator('/definitions/identifier/anyOf/0/properties/value'),

src/components/ScreenAuthors.vue

@@ -127,6 +127,7 @@ export default defineComponent({
             }
         }
         const moveAuthorUp = (index: number) => {
+            if (authors.value === undefined) return
             moveUp(index, authors.value, setAuthors)
             if (editingId.value === index && index > 0) {
                 editingId.value = editingId.value - 1
@@ -135,6 +136,7 @@ export default defineComponent({
             }
         }
         const moveAuthorDown = (index: number) => {
+            if (authors.value === undefined) return
             moveDown(index, authors.value, setAuthors)
             if (editingId.value === index && index < authors.value.length - 1) {
                 editingId.value = editingId.value + 1

src/components/ScreenIdentifiers.vue

@@ -145,6 +145,7 @@ export default defineComponent({
             }
         }
         const moveIdentifierUp = (index: number) => {
+            if (identifiers.value === undefined) return
             moveUp(index, identifiers.value, setIdentifiers)
             if (editingId.value === index && index > 0) {
                 editingId.value = editingId.value - 1
@@ -153,6 +154,7 @@ export default defineComponent({
             }
         }
         const moveIdentifierDown = (index: number) => {
+            if (identifiers.value === undefined) return
             moveDown(index, identifiers.value, setIdentifiers)
             if (editingId.value === index && index < identifiers.value.length - 1) {
                 editingId.value = editingId.value + 1