让凭证数组与套餐作废任务进入可联调状态

Constraint: 后端订单套餐作废接口使用 /api/admin/order-package-invalidate-tasks，上传
  purpose 只能使用 attachment。
  Rejected: 继续提交逗号拼接凭证字符串 | 新提交路径必须使用 string[]，历史字符串只做读取归一化。
  Confidence: high
  Scope-risk: broad
  Directive: 新增订单套餐作废权限时需同时配置菜单 URL 与
  order_package_invalidate_task:create/detail 按钮权限。
  Tested: bun run build；development 真实后端联调上传、创建、列表、详情通过；复机接口未触发。
  Not-tested: 未逐一手工覆盖所有历史凭证数据、全部角色权限组合和所有文件扩展名预览

src/components/business/CreateRefundDialog.vue

@@ -79,6 +79,7 @@
   import { RefundService, OrderService } from '@/api/modules'
   import type { CreateRefundRequest, Order } from '@/types/api'
   import { formatMoney, yuanToFen } from '@/utils/business/format'
+  import { getErrorMessage } from '@/utils/business'
   import VoucherUpload from '@/components/business/VoucherUpload.vue'
 
   interface Props {
@@ -110,13 +111,13 @@
     requested_refund_amount?: number
     actual_received_amount: number
     refund_reason: string
-    refund_voucher_key?: string
+    refund_voucher_key: string[]
   }>({
     order_id: null,
     requested_refund_amount: undefined,
     actual_received_amount: 0,
     refund_reason: '',
-    refund_voucher_key: undefined
+    refund_voucher_key: []
   })
 
   const validateRefundAmount = (rule: any, value: number, callback: any) => {
@@ -200,7 +201,7 @@
     formData.requested_refund_amount = undefined
     formData.actual_received_amount = 0
     formData.refund_reason = ''
-    formData.refund_voucher_key = undefined
+    formData.refund_voucher_key = []
     orderSearchOptions.value = []
     uploadRef.value?.clearFiles(false)
   }
@@ -220,7 +221,7 @@
             order_id: formData.order_id!,
             requested_refund_amount: yuanToFen(formData.requested_refund_amount) ?? 0,
             actual_received_amount: formData.actual_received_amount,
-            refund_voucher_key: formData.refund_voucher_key!,
+            refund_voucher_key: formData.refund_voucher_key,
             refund_reason: formData.refund_reason || undefined
           }
           await RefundService.createRefund(data)
@@ -229,6 +230,7 @@
           emit('success')
         } catch (error) {
           console.error(error)
+          ElMessage.error(getErrorMessage(error, '退款申请创建失败'))
         } finally {
           submitLoading.value = false
         }