fix: 列表当前页被删除空后页码减一

nezha-fronted/src/components/common/bottomBox/tabs/alertMessageTab.vue

@@ -715,6 +715,14 @@
           this.getAlertList();
         }
       },
+      tableData: {
+        deep: true,
+        handler(n) {
+          if (n.length === 0 && this.pageObj.pageNo > 1) {
+            this.pageNo(this.pageObj.pageNo-1);
+          }
+        }
+      }
     },
     created(){
       //是否存在分页缓存