feat: add request.js utility, service page, and fix hospital image URLs

- Add request.js for unified API calls with loading/error handling
- Add service page (service type listing)
- Fix hospital list to load from API with proper image URL construction
- Add service types dynamic loading on index page
- Various mini program improvements (order, care, wallet pages)

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

coupon/utils/config.js

@@ -2,8 +2,8 @@
 const config = {
   // 开发环境（本地后端，需改为本机IP）
   // baseUrl: 'http://192.168.1.100:8039',
-  // 生产环境
-  baseUrl: 'http://101.43.95.130:8039',
+  // 生产环境（通过 nginx 代理，HTTPS + 域名）
+  baseUrl: 'https://ruilaizipj.com/prod-api',
 }
 
 module.exports = config