fix(采购对账单): 添加防重复点击和选择订单必填

src/views/purchasingManage/purchaseOrder/accountstatement/components/purchaseForm.vue

@@ -220,7 +220,7 @@
     </el-row>
     <el-row v-if="dialogType !== 'view'">
       <el-col :span="24">
-        <el-button style="float: right" @click="handleSearch" type="primary"
+        <el-button style="float: right" v-click-once @click="handleSearch" type="primary"
           >查询</el-button
         >
       </el-col>
@@ -299,6 +299,7 @@
           },
           contractId: { required: true, message: '请选择', trigger: 'change' },
           queryDimension: { required: true, message: '请选择', trigger: 'change' },
+          sourceName: { required: true, message: '请输入', trigger: 'change' },
         }
       };
     },