fix: 修复报备导入映射与审核跳转

api/src/report-materials/import-review.service.ts

@@ -18,6 +18,7 @@ import {
   hasValue,
   normalizeImageExtension,
   imageContentType,
+  duplicateCoreMappingKind,
 } from './report-materials.helpers';
 import { ReportImportParserService } from './import-parser.service';
 import { compatibleImages, loadCompatibleWorkbook } from './workbook-compatibility';
@@ -36,6 +37,17 @@ export class ReportImportReviewService {
     if (!batch) throw new NotFoundException('导入批次不存在');
     if (batch.status !== 'analyzed') throw new ConflictException('该导入批次已提交审核，不能重复导入');
     if (!data.mappings?.length) throw new BadRequestException('请至少配置一个导入字段映射');
+    const duplicateCoreKind = duplicateCoreMappingKind(data.mappings);
+    if (duplicateCoreKind) {
+      const label = {
+        signatureName: '短信签名',
+        purpose: '签名用途/依据',
+        siteName: '站点名称',
+        url: '引流 URL 或号码',
+        remark: '备注',
+      }[duplicateCoreKind];
+      throw new BadRequestException(`目标字段“${label}”只能映射一个源列`);
+    }
     if (data.profile)
       await this.importParser.saveImportProfile({
         ...data.profile,