feat(订单模块): 更新支付商户标签和显示逻辑

- 修改支付商户相关表单项的标签，从“微信支付商户”更改为“支付商户”，以提高表述准确性
- 在订单详情中添加支付商户的显示逻辑，根据不同的支付商户值显示相应的名称 (众妙、灵枢)

src/views/modules/order/buyorderdetail.vue

@@ -100,6 +100,8 @@
            
             <span>IOS内购</span>
           </span>
+          <span v-if="orderDetails.payMerchant == 0">(众妙)</span>
+          <span v-if="orderDetails.payMerchant == 1">(灵枢)</span>
         </li> 
 
         <li

src/views/modules/shop/curriculum.vue

@@ -174,7 +174,7 @@
             <el-radio :label="0">否</el-radio>
           </el-radio-group>
         </el-form-item>
-        <el-form-item label="微信支付商户" prop="payMerchant">
+        <el-form-item label="支付商户" prop="payMerchant">
           <el-radio-group v-model="dataForm.payMerchant">
             <el-radio :label="0">众妙之门</el-radio>
             <el-radio :label="1">灵枢教育科技</el-radio>
@@ -288,7 +288,7 @@ export default {
         // format: '', // 开本
         isFreeMail: 1, // 是否包邮
         isVipPrice: 1,  //是否vip
-        payMerchant: 0, // 微信支付商户
+        payMerchant: 0, // 支付商户
         // pageNum: '',
         // quality: '', // 内文用纸
         isNew: 0,

src/views/modules/shop/shopproduct-add-or-update.vue

@@ -224,7 +224,7 @@
             <el-radio :label="0">否</el-radio>
           </el-radio-group>
         </el-form-item>
-        <el-form-item label="微信支付商户" prop="payMerchant">
+        <el-form-item label="支付商户" prop="payMerchant">
           <el-radio-group v-model="dataForm.payMerchant">
             <el-radio :label="0">众妙之门</el-radio>
             <el-radio :label="1">灵枢教育科技</el-radio>
@@ -332,7 +332,7 @@ export default {
         // format: '', // 开本
         isFreeMail: 1, // 是否包邮
         isVipPrice: 0,  //是否vip
-        payMerchant: 0, // 微信支付商户
+        payMerchant: 0, // 支付商户
         // pageNum: '',
         // quality: '', // 内文用纸
         isNew: 0,
@@ -641,7 +641,7 @@ export default {
               isFreeMail: this.dataForm.isFreeMail,
               isVipPrice: this.dataForm.isVipPrice,
               isNew: this.dataForm.isNew,
-              payMerchant: this.dataForm.payMerchant, // 微信支付商户
+              payMerchant: this.dataForm.payMerchant, // 支付商户
               // 'pageNum': this.dataForm.pageNum,
               // 'quality': this.dataForm.quality, // 内文用纸
               productStock: this.dataForm.productStock, // 库存