fix: 编辑订单时加载length、width、area字段

src/pages/order/create.vue

@@ -250,7 +250,10 @@ export default {
           spec: item.productSpec,
           unit: item.unit,
           price: item.price,
-          quantity: item.quantity
+          quantity: item.quantity,
+          length: item.length || '',
+          width: item.width || '',
+          area: item.area || ''
         }))
         
         this.discountRate = order.discountRate