fix(EQD-7049): 新建空白期权定价页跳过空标的默认查询，避免'标的信息缺失'弹窗

- 页面初始化时 updateUnderlying 以空 UnderlyingCode/InstrumentType/VarietyId 发起 /pricing/AjaxGetUnderlying，后端三者皆空返回 JsonError('标的信息缺失') 并自动弹窗
- 前端守卫：三者皆空时仅重置空 underlying 并 return，不再发请求，与后端 AjaxGetUnderlying(PricingController.cs:398-414) 判定精确对应
- 不影响正常路径：选类型(InstrumentType)/品种(VarietyId>0)/具体标的(UnderlyingCode) 仍照常查询
- 同步修改东莞定制版 structure_dz.js

YLErpWeb/wwwroot/Scripts/app/pricing/structure.js

@@ -1470,6 +1470,12 @@ const vueTrade = function () {
             //更新标的
             updateUnderlying(reqData, fromSelect) {
                 let self = this;
+                // EQD-7049：新建空白页未选标的/品种/类型时，跳过必然失败的后端默认标的查询，避免报“标的信息缺失”
+                var hasQueryKey = !!(reqData.UnderlyingCode || reqData.InstrumentType || reqData.VarietyId > 0);
+                if (!hasQueryKey) {
+                    !fromSelect && (self.viewState.underlying = tradeHelper.getEmptyUnderlying());
+                    return;
+                }
                 var instTypeChanged = !!reqData.InstrumentType;
                 !fromSelect && (self.viewState.underlying = tradeHelper.getEmptyUnderlying());
                 main.post("/pricing/AjaxGetUnderlying", reqData).done(function (resp) {

YLErpWeb/wwwroot/Scripts/app/pricing/structure_dz.js

@@ -1084,6 +1084,12 @@ const vueTrade = function () {
             //更新标的
             updateUnderlying(reqData, fromSelect) {
                 let self = this;
+                // EQD-7049：新建空白页未选标的/品种/类型时，跳过必然失败的后端默认标的查询，避免报“标的信息缺失”
+                var hasQueryKey = !!(reqData.UnderlyingCode || reqData.InstrumentType || reqData.VarietyId > 0);
+                if (!hasQueryKey) {
+                    !fromSelect && (self.viewState.underlying = tradeHelper.getEmptyUnderlying());
+                    return;
+                }
                 var instTypeChanged = !!reqData.InstrumentType;
                 !fromSelect && (self.viewState.underlying = tradeHelper.getEmptyUnderlying());
                 main.post("/pricing/AjaxGetUnderlying", reqData).done(function (resp) {