fix(apply): update order number field naming and enhance validation logic

- Rename order_no field to order_sn for consistency with API
- Update validation logic to ensure customer name is fetched based on order_sn
- Improve error messages for better user guidance during form submission
- Adjust navigation behavior after successful submission to switch tabs instead of navigating back

pages/apply/index.vue

@@ -6,8 +6,8 @@
                     <u--input v-model="apply_type_name" disabled disabledColor="#ffffff" placeholder="请选择" border="none" inputAlign="right"></u--input>
                     <u-icon slot="right" name="arrow-down" color="#c0c4cc"></u-icon>
                 </u-form-item>
-                <u-form-item label="订单号" prop="order_no" required borderBottom>
-                    <u--input v-model="form.order_no" placeholder="请输入" border="none" inputAlign="right" @input="handleOrderNoInput"></u--input>
+                <u-form-item label="订单号" prop="order_sn" required borderBottom>
+                    <u--input v-model="form.order_sn" placeholder="请输入" border="none" inputAlign="right" @input="handleOrderNoInput"></u--input>
                 </u-form-item>
                 <u-form-item label="客户名称" prop="customer_name" required>
                     <view class="row verCenter boxFlex" style="justify-content: flex-end;">
@@ -62,7 +62,7 @@
             return {
                 form: {
                     apply_type: '',
-                    order_no: '',
+                    order_sn: '',
                     customer_name: '',
                     apply_fee_amount: '',
                     relief_detail: '',
@@ -108,14 +108,14 @@
              * @return {void}
              */
             handleOrderNoInput: debounce(function() {
-                var orderNo = this.form.order_no.trim();
+                var orderSn = this.form.order_sn.trim();
                 
-                if (!orderNo) {
+                if (!orderSn) {
                     this.form.customer_name = '';
                     return;
                 }
                 
-                this.request(API.getCustomerName, 'GET', { order_sn: orderNo }).then(res => {
+                this.request(API.getCustomerName, 'GET', { order_sn: orderSn }).then(res => {
                     if (res.code === 0) {
                         this.form.customer_name = res.data;
                     } else {
@@ -133,25 +133,25 @@
              * @return {boolean} 校验是否通过
              */
             validateForm() {
-                var { apply_type, order_no, customer_name, apply_fee_amount, relief_detail, relief_reason } = this.form;
+                var { apply_type, order_sn, customer_name, apply_fee_amount, relief_detail, relief_reason } = this.form;
                 
                 if (!apply_type) {
                     this.errorMsg = '请选择申请类型';
                     return false;
                 }
                 
-                if (!order_no) {
+                if (!order_sn) {
                     this.errorMsg = '请输入订单号';
                     return false;
                 }
-                
-                if (!customer_name) {
-                    this.errorMsg = '请输入有效的订单号以获取客户名称';
+
+                if (!apply_fee_amount) {
+                    this.errorMsg = '请输入申请免收金额';
                     return false;
                 }
                 
-                if (!apply_fee_amount) {
-                    this.errorMsg = '请输入申请免收金额';
+                if (isNaN(apply_fee_amount) || Number(apply_fee_amount) <= 0) {
+                    this.errorMsg = '请输入有效的申请免收金额';
                     return false;
                 }
                 
@@ -164,6 +164,11 @@
                     this.errorMsg = '请输入免收原因';
                     return false;
                 }
+
+                if (!customer_name) {
+                    this.errorMsg = '请输入有效的订单号以获取客户名称';
+                    return false;
+                }
                 
                 this.errorMsg = '';
                 return true;
@@ -186,8 +191,10 @@
                         });
                         
                         setTimeout(() => {
-                            uni.navigateBack();
-                        }, 1500);
+                            uni.switchTab({
+                                url: '/pages/approve/index'
+                            });
+                        }, 2000);
                     } else {
                         this.errorMsg = res.msg || '提交失败';
                     }