fix(web-admin): 科研捐赠导出补齐运费并按批次合并单元格

列表未返回样本运费批次导致运费列为空。导出按同一运费批次合并运输方式与运费列，并按模板对齐储存状态等字段。

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/views/cell-storage/protocol-audit/DonationProtocolTab.vue

@@ -569,11 +569,13 @@
         ElMessage.warning('没有可导出的数据')
         return
       }
+      const ledger = buildResearchLedgerRows(rows)
       await saveCollectionLedgerWorkbook(
         '科研表',
         RESEARCH_HEADERS,
-        buildResearchLedgerRows(rows),
-        '科研表'
+        ledger.rows,
+        '科研表',
+        ledger.merges
       )
       ElMessage.success('导出成功')
     } catch {