feat(report): 添加互换估值列配置功能

- 引入 Newtonsoft.Json 用于列配置的序列化处理
- 实现 ApplySwapValuationColumnConfig 方法应用用户自定义列配置
- 添加 ReorderSwapValuationColumns 方法重新排序可见列
- 在每日估值报告导出时同步业务字段显示状态和列顺序
- 使用临时工作表避免 EPPlus 扩列时的 ColumnMax 冲突
- 确保列配置损坏时不影响报告导出功能

YLErpDAL/Modules/ReportModule/SettlementReportModule/SettlementReportFotShanXiService.cs

@@ -1,4 +1,5 @@
 using BaseOUDAL;
+using Newtonsoft.Json;
 using OfficeOpenXml;
 using OfficeOpenXml.Style;
 using Org.BouncyCastle.Ocsp;
@@ -309,6 +310,7 @@ namespace YLErp.Modules.ReportModule.SettlementReportModule
                 , shouldDeleteSheet: true, needToPdf: false, callback: sheets =>
                 {
                     FormatSwapValuationDisplayCells(sheets, report.EodSwapPositions);
+                    ApplySwapValuationColumnConfig(sheets);
                 });
             if (needToPdf)
             {
@@ -384,6 +386,135 @@ namespace YLErp.Modules.ReportModule.SettlementReportModule
             cell.Style.Numberformat.Format = "@";
         }
 
+        /// <summary>
+        /// 每日估值报告的互换估值导出使用当前用户已保存的列配置，
+        /// 同时同步业务字段的显示状态和列顺序。
+        /// </summary>
+        private void ApplySwapValuationColumnConfig(IEnumerable<ExcelWorksheet> sheets)
+        {
+            var worksheet = sheets.FirstOrDefault(x => x.Name == "互换估值");
+            if (worksheet == null)
+            {
+                return;
+            }
+
+            var config = configcolumnBLL.GetData(UserId, configcolumn_data.互换估值V1);
+            if (string.IsNullOrWhiteSpace(config?.data))
+            {
+                return;
+            }
+
+            List<columnmodel> columns;
+            try
+            {
+                columns = JsonConvert.DeserializeObject<List<columnmodel>>(config.data);
+            }
+            catch (JsonException)
+            {
+                // 列配置损坏时保留完整的模板字段，不能导致每日估值报告导出失败。
+                return;
+            }
+
+            if (columns == null || !columns.Any())
+            {
+                return;
+            }
+
+            var columnIndexByName = new Dictionary<string, int>
+            {
+                ["ConfrimNo"] = 1,
+                ["TradeNumber"] = 2,
+                ["position.PosiStartDate"] = 3,
+                ["MaturitySettlementDate"] = 4,
+                ["position.ValueDate"] = 5,
+                ["position.UnderlyingCode"] = 6,
+                ["InterestRate"] = 7,
+                ["position.PosiNotionalValue"] = 8,
+                ["position.PosiQuantity"] = 9,
+                ["PeriodAmount"] = 10,
+                ["DividendAmount"] = 11,
+                ["position.PosiGrossPrice"] = 12,
+                ["InitYtm"] = 13,
+                ["position.UnderlyingPrice"] = 14,
+                ["DayCount"] = 15,
+                ["FloatRateAbs"] = 16,
+                ["InterestAmount"] = 17,
+                ["position.PosiProfitSum"] = 18,
+                ["position.PosiFeePending"] = 19,
+                ["OpenMarginRate"] = 20,
+                ["MarginInterestAmount"] = 21,
+                ["OpenMarginAmount"] = 22,
+                ["AdditionalMarginAmount"] = 23,
+                ["NetSettmentAmount"] = 24,
+                ["TrsValue"] = 25
+            };
+            // 前端 _.uniqBy 保留首次出现的配置项，导出按相同规则过滤重复字段，
+            // 并保留该列表的原始顺序作为 Excel 列顺序。
+            var visibleColumnIndexes = new List<int>();
+            var configuredNames = new HashSet<string>();
+            foreach (var column in columns)
+            {
+                if (column == null || string.IsNullOrEmpty(column.name) || !configuredNames.Add(column.name))
+                {
+                    continue;
+                }
+
+                if (!column.hidden && columnIndexByName.TryGetValue(column.name, out var index))
+                {
+                    visibleColumnIndexes.Add(index);
+                }
+            }
+
+            // 与前端一致：旧配置缺少的新增字段默认隐藏；若没有任何业务列可见，
+            // 前端会回退展示全部默认列，导出保持模板默认顺序。
+            if (!visibleColumnIndexes.Any())
+            {
+                return;
+            }
+
+            ReorderSwapValuationColumns(worksheet, visibleColumnIndexes);
+        }
+
+        /// <summary>
+        /// 使用临时工作表保存可见列，再按目标顺序复制回原工作表。
+        /// 原工作表始终保持在模板的 25 列范围内，避免 EPPlus 扩列时触发 ColumnMax 冲突。
+        /// </summary>
+        private static void ReorderSwapValuationColumns(ExcelWorksheet worksheet, IReadOnlyList<int> visibleSourceIndexes)
+        {
+            var lastRow = worksheet.Dimension.End.Row;
+            var originalColumnCount = worksheet.Dimension.End.Column;
+            var workbook = worksheet.Workbook;
+            var bufferName = "__swap_cols_" + Guid.NewGuid().ToString("N").Substring(0, 12);
+            var buffer = workbook.Worksheets.Add(bufferName);
+            try
+            {
+                for (var targetIndex = 0; targetIndex < visibleSourceIndexes.Count; targetIndex++)
+                {
+                    var sourceColumn = visibleSourceIndexes[targetIndex];
+                    var bufferColumn = targetIndex + 1;
+                    worksheet.Cells[1, sourceColumn, lastRow, sourceColumn]
+                        .Copy(buffer.Cells[1, bufferColumn, lastRow, bufferColumn]);
+                }
+
+                for (var targetIndex = 0; targetIndex < visibleSourceIndexes.Count; targetIndex++)
+                {
+                    var targetColumn = targetIndex + 1;
+                    buffer.Cells[1, targetColumn, lastRow, targetColumn]
+                        .Copy(worksheet.Cells[1, targetColumn, lastRow, targetColumn]);
+                }
+
+                var columnsToDelete = originalColumnCount - visibleSourceIndexes.Count;
+                if (columnsToDelete > 0)
+                {
+                    worksheet.DeleteColumn(visibleSourceIndexes.Count + 1, columnsToDelete);
+                }
+            }
+            finally
+            {
+                workbook.Worksheets.Delete(buffer);
+            }
+        }
+
         /// <summary>
         /// 财务状况
         /// </summary>