Refactor forms to use EntityEditForm component; enhance styles and improve structure

frontend/vue-app/src/components/notification/NotificationView.vue

@@ -1,6 +1,10 @@
 <template>
   <div class="notification-view">
+    <MessageBlock v-if="notificationListCountRef === 0" message="No new notifications">
+    </MessageBlock>
+
     <ItemList
+      v-else
       :fetchUrl="`/api/pending-rewards`"
       itemKey="rewards"
       :itemFields="PENDING_REWARD_FIELDS"
@@ -29,6 +33,7 @@
 import { ref } from 'vue'
 import { useRouter } from 'vue-router'
 import ItemList from '../shared/ItemList.vue'
+import MessageBlock from '../shared/MessageBlock.vue'
 import type { PendingReward } from '@/common/models'
 import { PENDING_REWARD_FIELDS } from '@/common/models'