✨ 结算单新增时自动查询BFI汇率

- currency.js: 新增getBfiExchangeRate接口调用
- pre-settlement-editor.vue:
  - 选择合同后同步结算币种并自动查询当天BFI汇率
  - 汇率日期变更时自动查询BFI汇率并回填结算汇率
  - 新增时自动设置当天日期并查询汇率
- formal-settlement-editor.vue:
  - 选择合同后同步结算币种并自动查询当天BFI汇率
  - 汇率日期变更时自动查询BFI汇率并回填结算汇率
  - 新增时自动查询当天BFI汇率

src/views/settlement/components/formal-settlement-editor.vue

@@ -22,6 +22,7 @@
                   type="date"
                   value-format="YYYY-MM-DD"
                   placeholder="请选择"
+                  @change="fetchBfiExchangeRate"
                 />
                 <el-select
                   v-else-if="field.type === 'project' && editable"
@@ -947,6 +948,7 @@ import {
   getDetailFees as getPreSettlementDetailFees,
 } from '@/api/settlement/preSettlement';
 import { calculateAdjustedFee, getFeeDetail } from '@/api/settlement/receivable-payable-detail';
+import { getBfiExchangeRate } from '@/api/base/currency';
 import {
   createFormalSettlementForm,
   formalSettlementFormFields,
@@ -1250,6 +1252,7 @@ export default {
         if (this.initialData) await this.applyInitialData();
         Object.assign(this.form, newRecordAudit);
         await this.refreshFormalSettlementNo();
+        await this.fetchBfiExchangeRate();
         return;
       }
       this.loading = true;
@@ -1482,6 +1485,7 @@ export default {
           (settlementType === 'receivable' ? contract.partyA : contract.partyB),
         settlementType,
         settlementTypeName: settlementType === 'receivable' ? '应收' : '应付',
+        currency: contract.settlementCurrency || 'RMB',
       });
       this.sources = [];
       this.details = [];
@@ -1489,6 +1493,23 @@ export default {
       this.form.sourcePreSettlementIds = [];
       this.form.sourceDetailIds = [];
       if (refreshSettlementNo) this.refreshFormalSettlementNo();
+      if (this.form.currency !== 'RMB') this.fetchBfiExchangeRate();
+    },
+    async fetchBfiExchangeRate() {
+      const currency = this.form.currency;
+      if (!currency || currency === 'RMB') return;
+      if (!this.form.exchangeRateDate) return;
+      try {
+        const { data } = await getBfiExchangeRate(currency, this.form.exchangeRateDate);
+        const rateData = data?.data;
+        if (rateData?.excval != null) {
+          this.form.exchangeRate = Number(rateData.excval);
+        } else {
+          this.$message.warning(`未查询到 ${currency} 的BFI汇率数据`);
+        }
+      } catch (e) {
+        this.$message.warning('查询BFI汇率失败，请手动输入结算汇率');
+      }
     },
     openCandidateDialog() {
       this.candidate.visible = true;