fix: image URLs incorrectly using API base URL instead of image base URL

Images are served from MinIO directly, not through /prod-api proxy.
Add imageBaseUrl to config and use it in fixImageUrl() and WXML templates.
This fixes images not loading on order list and detail pages.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

coupon/app.js

@@ -21,6 +21,7 @@ App({
     url: config.baseUrl,
     domain: config.baseUrl,
     domaintwo: config.baseUrl,
+    imageBaseUrl: config.imageBaseUrl,
 
     phone: '',
     uid: '',
@@ -106,11 +107,11 @@ App({
     };
   },
 
-  // 修复图片路径：相对路径补全 baseUrl，绝对 URL 或空值原样返回
+  // 修复图片路径：相对路径补全图片基地址，绝对 URL 或空值原样返回
   fixImageUrl: function (path) {
     if (!path) return '';
     if (path.indexOf('http') === 0) return path;
-    return this.globalData.url + path;
+    return this.globalData.imageBaseUrl + path;
   },
 
   // 获取订单状态文案

coupon/pages/order/order.js

@@ -7,7 +7,7 @@ Page({
     nav_type: 1,
     all: true,
     height: '',
-    url: app.globalData.url,
+    url: app.globalData.imageBaseUrl,
     statusType: ["全部", "待接单", "已接单", "服务中", "待支付", "已完成","已取消"],
     status: ["", "0", "1", "2", "3","4","-2"],
     currentType: 0,

coupon/pages/orderdetail/orderdetail.js

@@ -14,7 +14,7 @@ Page({
     qrcode: '',
     id: '',
     item: {},
-    url: app.globalData.url,
+    url: app.globalData.imageBaseUrl,
     refund: '',
     charge_phone: '',
     refund_box: false,

coupon/shopping/pages/goddess/goddess.js

@@ -5,7 +5,7 @@ Page({
 
   data: {
     height: '',
-    url: app.globalData.url,
+    url: app.globalData.imageBaseUrl,
     seckill_start: '请输入开始日期',
     seckill_endx: '请输入结束日期',
     time: 30 * 60 * 60 * 1000,

coupon/utils/config.js

@@ -4,6 +4,8 @@ const config = {
   // baseUrl: 'http://192.168.1.100:8039',
   // 生产环境（通过 nginx 代理，HTTPS + 域名）
   baseUrl: 'https://ruilaizipj.com/prod-api',
+  // 图片/文件访问基地址（不走 /prod-api 代理，MinIO 直接访问）
+  imageBaseUrl: 'https://ruilaizipj.com',
 }
 
 module.exports = config