完善新操作日志的页面修改

src/main/java/cn/iocoder/dashboard/common/pojo/PageResult.java

@@ -31,4 +31,8 @@ public final class PageResult<T> implements Serializable {
         this.total = total;
     }
 
+    public static <T> PageResult<T> empty() {
+        return new PageResult<>(0L);
+    }
+
 }