style: 新增背景，部分页面bbs适配移动端

Yi.Bbs.Vue3/src/layout/AppBody.vue

@@ -1,9 +1,14 @@
 <template>
+<StarBackground :speed="0.2" :number="1000"/>
   <div class="content-main">
     <RouterView />
   </div>
-</template>
 
+   
+</template>
+<script setup>
+import StarBackground from "@/components/StarBackground.vue";
+</script>
 <style scoped>
 .content-main {
   width: 100%;
@@ -11,6 +16,6 @@
   display: flex;
   justify-content: center;
   /* min-height: 1150px; */
-  background-color: #f0f2f5;
+  /*background-color: #f0f2f5;*/
 }
 </style>