fix Bug or add example

src/components/Application/Application.vue

@@ -11,7 +11,7 @@
 </template>
 
 <script lang="ts">
-import { defineComponent, computed, ref, onMounted, onUnmounted } from 'vue'
+import { defineComponent } from 'vue'
 import { MessageContent } from '@/components/MessageContent'
 import { DialogContent } from '@/components/DialogContent'