feat：部分代码去除事件监听

nezha-fronted/src/components/page/dashboard/overview/overview2.vue

@@ -109,7 +109,7 @@
           </div>
           <div class="content-col-content"  v-loading="topologyLoading">
             <transition name = "el-zoom-in-center">
-              <div style="width: 100%;height: 100%;position: relative" v-if="allProject.length>0">
+              <div style="width: 100%;height: 100%;position: relative" v-if="allProject&&allProject.length>0">
                 <el-carousel :interval="5000" arrow="hover" :trigger="'click'">
                   <el-carousel-item v-for="(item,index) in allProject" :key="index">
                     <div class="maskLayer" @click="toProject(item)"></div>
@@ -1589,11 +1589,12 @@
       // };
     },
     beforeDestroy(){
-      this.allProject=null;
+      this.allProject=[];
     },
     destroyed() {
       clearInterval(this.freshDataTimer);
       clearInterval(this.freshDateTimer);
+      this.allProject=null;
     }
   }
 </script>