feat(nc-gui): introduce no image option in cover image fields menu

packages/nc-gui/components/smartsheet/Gallery.vue

@@ -177,7 +177,7 @@ watch(view, async (nextView) => {
             class="!rounded-lg h-full overflow-hidden break-all max-w-[450px]"
             @click="expandFormClick($event, record)"
           >
-            <template #cover>
+            <template v-if="galleryData.fk_cover_image_col_id" #cover>
               <a-carousel v-if="!reloadAttachments && attachments(record).length" autoplay class="gallery-carousel" arrows>
                 <template #customPaging>
                   <a>

packages/nc-gui/components/smartsheet/toolbar/FieldsMenu.vue

@@ -80,7 +80,6 @@ const coverImageColumnId = computed({
       : undefined,
   set: async (val) => {
     if (
-      val &&
       (activeView.value?.type === ViewTypes.GALLERY || activeView.value?.type === ViewTypes.KANBAN) &&
       activeView.value?.id &&
       activeView.value?.view
@@ -104,14 +103,16 @@ const coverImageColumnId = computed({
 })
 
 const coverOptions = computed<SelectProps['options']>(() => {
-  return fields.value
+  const filterFields =
+    fields.value
       ?.filter((el) => el.fk_column_id && metaColumnById.value[el.fk_column_id].uidt === UITypes.Attachment)
       .map((field) => {
         return {
           value: field.fk_column_id,
           label: field.title,
         }
-    })
+      }) ?? []
+  return [{ value: null, label: 'No Image' }, ...filterFields]
 })
 
 const getIcon = (c: ColumnType) =>