fix: /wx/** 路径排除 Sa-Token 鉴权，确保微信回调及调试接口可匿名访问

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

car-wash-miniapp/src/main/java/com/kym/miniapp/config/SaTokenConfigure.java

@@ -27,7 +27,7 @@ public class SaTokenConfigure implements WebMvcConfigurer {
                     StpUtil.checkLogin();
                 }))
                 .addPathPatterns("/**")
-                .excludePathPatterns("/parking-coupon/**");
+                .excludePathPatterns("/parking-coupon/**", "/wx/**");
     }
 
 }