fix: 结算行付款金额联动回填申请付款金额并校验合计一致

结算信息行改动付款比例或付款金额时，自动把行金额合计回填到上方申请付款金额并重算比例；
保存/提交前校验行金额合计与申请付款金额一致，避免推送金蝶金额与预付建档分摊不一致。
回显加载走默认不同步，避免改写历史单据。

src/views/payment/payment-application-form.vue

@@ -3125,18 +3125,21 @@ export default {
       if (!target) return;
       target.paymentRatio = value;
       this.syncRowPayment(target, 'ratio');
-      this.syncHeaderSettlementTotalsFromRows();
+      this.syncHeaderSettlementTotalsFromRows(true);
     },
     handleRowAppliedAmountChange(row, value) {
       const target = this.findReferenceRow(row);
       if (!target) return;
       target.appliedAmount = value;
       this.syncRowPayment(target, 'amount');
-      this.syncHeaderSettlementTotalsFromRows();
+      this.syncHeaderSettlementTotalsFromRows(true);
     },
-    /** 多结算单时仅同步结算金额/可付款金额合计，申请付款金额与比例由上方独立维护 */
-    syncHeaderSettlementTotalsFromRows() {
-      if (this.referenceRows.length <= 1) return;
+    /**
+     * 结算信息行合计回填付款基本信息。
+     * @param {boolean} syncApplied 行内编辑时同步申请付款金额与比例；回显加载时保持原值，避免改写历史单据
+     */
+    syncHeaderSettlementTotalsFromRows(syncApplied = false) {
+      if (!this.referenceRows.length) return;
       const settlementAmount = this.referenceRows.reduce(
         (total, item) => total + Number(item.settlementAmount || 0),
         0
@@ -3145,9 +3148,21 @@ export default {
         (total, item) => total + Number(item.payableAmount || 0),
         0
       );
+      const appliedAmount = this.referenceRows.reduce(
+        (total, item) => total + Number(item.appliedAmount || 0),
+        0
+      );
       this.amountSyncing = true;
       this.form.settlementAmount = Number(settlementAmount.toFixed(2));
       this.form.payableAmount = Number(payableAmount.toFixed(2));
+      if (syncApplied) {
+        this.form.appliedAmount = Number(appliedAmount.toFixed(2));
+        if (this.paymentAmountBase) {
+          this.form.paymentRatio = Number(
+            ((appliedAmount / this.paymentAmountBase) * 100).toFixed(2)
+          );
+        }
+      }
       this.$nextTick(() => {
         this.amountSyncing = false;
         this.$refs.formRef?.validateField?.(['settlementAmount', 'appliedAmount']);
@@ -3321,6 +3336,18 @@ export default {
           ElMessage.warning(`${exceededRow.settlementNo || '结算单'}付款金额不能超过可付款金额`);
           return false;
         }
+        const rowAppliedTotal = this.referenceRows.reduce(
+          (total, item) => total + Number(item.appliedAmount || 0),
+          0
+        );
+        // 金蝶按付款基本信息申请金额推单，行合计不等时预付建档分摊会与金蝶金额不一致
+        if (Math.abs(rowAppliedTotal - appliedAmount) > 0.005) {
+          this.clearMessages();
+          ElMessage.warning(
+            `结算行付款金额合计${rowAppliedTotal.toFixed(2)}与申请付款金额${appliedAmount.toFixed(2)}不一致，请调整`
+          );
+          return false;
+        }
       }
       if (this.form.paymentType === 'project_advance' && !this.form.projectId) {
         this.clearMessages();