fix: 正式结算单金额按结算币种显示，追加预结算来源结算金额按汇率反算

- 结算合计原金额/结算金额/合计行与表头结算金额按合同结算币种显示币种代码（人民币 RMB、外币如 USD），本位币合计固定 RMB
- confirmCandidates 追加预结算来源时结算金额由来源本位币汇总按结算汇率反算，本位币合计保留本位币汇总，修复外币结算未换算

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

@@ -84,7 +84,12 @@
                 >
                   {{ form.formalSettlementNo || (form.id ? '-' : '系统自动生成') }}
                 </span>
-                <span v-else-if="field.money">{{ formatMoney(form[field.prop]) }}</span>
+                <span v-else-if="field.money">{{
+                  formatMoney(
+                    form[field.prop],
+                    field.prop === 'settlementAmount' ? settlementCurrencyCode : 'RMB'
+                  )
+                }}</span>
                 <span v-else-if="field.type === 'select'">{{
                   formSelectLabel(field, form[field.prop])
                 }}</span>
@@ -180,7 +185,7 @@
                   'formal-editor__negative-amount': isNegativeAdjustedAmount(row, column.prop),
                 }"
               >
-                {{ formatMoney(row[column.prop]) }}
+                {{ formatMoney(row[column.prop], settlementCurrencyCode) }}
               </span>
               <span v-else-if="column.prop === 'feeType'">{{ feeCategoryName(row.feeType) }}</span>
               <span v-else>{{ displayValue(row[column.prop]) }}</span>
@@ -201,7 +206,7 @@
           class="formal-editor__settle-summary"
         >
           <el-descriptions-item label="结算合计（原金额）">
-            {{ formatMoney(form.settlementAmount) }}
+            {{ formatMoney(form.settlementAmount, settlementCurrencyCode) }}
           </el-descriptions-item>
           <el-descriptions-item label="已付金额（含预付、核销）">
             {{ formatMoney(settlePaidTotal) }}
@@ -1373,6 +1378,10 @@ export default {
     isLocalCurrencySettlement() {
       return normalizeCurrencyCode(this.form.currency) === 'RMB';
     },
+    // 结算单据币种：本位币结算固定 RMB，外币结算取归一化后的合同结算币种
+    settlementCurrencyCode() {
+      return this.isLocalCurrencySettlement ? 'RMB' : normalizeCurrencyCode(this.form.currency);
+    },
     visibleFields() {
       if (!this.isLocalCurrencySettlement) return this.fields;
       return this.fields.filter(field => !LOCAL_CURRENCY_HIDDEN_FIELDS.includes(field.prop));
@@ -1945,12 +1954,13 @@ export default {
         });
         this.refreshFormalSettlementNo();
       }
-      this.form.settlementAmount = this.sources.reduce(
+      // 来源预结算金额为本位币；外币结算时结算金额按汇率反算，本位币合计保留本位币汇总
+      const sourceTotal = this.sources.reduce(
         (sum, item) => sum + Number(item.settlementAmount || 0),
         0
       );
-      this.form.localSettlementAmount =
-        this.form.settlementAmount * Number(this.form.exchangeRate || 1);
+      this.form.settlementAmount = this.convertLocalToSettlementAmount(sourceTotal);
+      this.form.localSettlementAmount = Number(sourceTotal).toFixed(2);
       this.candidate.visible = false;
       // 预结算转正式：带出来源预结算已保存的项目预付核销行（后端保存时转移源行，额度单份占用）
       const newIds = this.sources
@@ -2100,7 +2110,7 @@ export default {
         if (index === 0) return '合计';
         if (!sumProps.includes(column.property)) return '';
         const total = data.reduce((sum, row) => sum + Number(row[column.property] || 0), 0);
-        const totalText = this.formatMoney(total);
+        const totalText = this.formatMoney(total, this.settlementCurrencyCode);
         if (column.property === 'settlementAmount' && hasNegativeAdjustment) {
           return h('span', { style: { color: 'var(--el-color-danger)' } }, totalText);
         }
@@ -3167,8 +3177,8 @@ export default {
       const body = response?.data || response || {};
       return body?.data || body;
     },
-    formatMoney(value) {
-      return `${Number(value || 0).toFixed(2)} RMB`;
+    formatMoney(value, currency = 'RMB') {
+      return `${Number(value || 0).toFixed(2)} ${currency}`;
     },
     formatDetailTransportQuantity(row) {
       const value = row.transportQuantity;