fix: 修改已收金额为本次收款金额，并添加金额校验逻辑

src/views/financialManage/receivableManage/components/collectionDialog.vue

@@ -13,7 +13,7 @@
   >
     <div style="margin: 10px 0; font-size: 14px; color: #606266;">
       <span>应收金额：{{ selectedReceivableAmount }} 元</span>
-      <span style="margin-left: 20px;">已收金额：{{ receivedAmount }} 元</span>
+      <span style="margin-left: 20px;">本次收款金额：{{ receivedAmount }} 元</span>
       <span style="margin-left: 20px;">未收金额：{{ unreceivedAmount }} 元</span>
     </div>
     <el-form ref="form" :model="form" class="table-form" label-width="100px">
@@ -36,7 +36,7 @@
           </el-form-item>
         </el-col>
         <el-col :span="8">
-          <el-form-item label="已收金额">
+          <el-form-item label="本次收款金额">
             <el-input
               :value="receivedAmount"
               placeholder="0"
@@ -233,7 +233,7 @@ export default {
           minWidth: 120,
           headerSlot: 'headerRequired',
           prop: 'statementAmount',
-          label: '本次已收金额',
+          label: '本次收款金额',
           align: 'center',
           slot: 'statementAmount'
         },
@@ -495,9 +495,26 @@ export default {
         if (tips.length) {
           this.$message.warning('勾选的应收明细存在未填写项：' + tips.join('、'));
           reject(false);
-        } else {
-          resolve(true);
+          return;
+        }
+        // 本次录入收款金额之和 不能超过 历史未收金额
+        // 字段语义：statementAmount=本次录入；unreceiveTotalPrice=接口下发的历史未收汇总
+        const totalStatementAmount = this.selection.reduce(
+          (pre, item) => pre + (+item.statementAmount || 0),
+          0
+        );
+        const unreceive = +this.unreceivedAmount || 0;
+        // 用「分」做整数比较，避开浮点精度（例：0.1+0.2 之类）
+        const totalCents = Math.round(totalStatementAmount * 100);
+        const unreceiveCents = Math.round(unreceive * 100);
+        if (totalCents > unreceiveCents) {
+          this.$message.warning(
+            `本次录入收款金额之和（${totalStatementAmount.toFixed(2)} 元）不能大于未收金额（${unreceive} 元）`
+          );
+          reject(false);
+          return;
         }
+        resolve(true);
       });
     },