复制整块，使用一次后，清理缓存数据

app/public/js/ledger.js

@@ -616,7 +616,7 @@ $(document).ready(function() {
                     disabled: function (key, opt) {
                         //const block = treeOperationObj.block || [];
                         const copyInfo = JSON.parse(getLocalCache(copyBlockTag));
-                        return copyInfo && copyInfo.tid && copyInfo.tid > 0 && copyInfo.block && copyInfo.block.length <= 0;
+                        return !(copyInfo && copyInfo.tid && copyInfo.tid > 0 && copyInfo.block && copyInfo.block.length > 0);
                     },
                     callback: function (key, opt) {
                         //const block = treeOperationObj.block || [];