feat(subscription): 实现订阅订单创建与支付功能

- 新增创建订阅订单接口，支持生成订单号及价格试算
- 新增订阅订单支付接口，集成微信Native支付生成二维码
- 添加订单创建与支付结果返回类
- 注入微信支付控制器并调用其生成支付二维码方法
- 校验用户登录状态、套餐ID及支付金额有效性
- 构建订单对象用于支付二维码生成，并返回支付链接

src/main/java/com/gxwebsoft/common/system/controller/SubscriptionOrderController.java

@@ -1,8 +1,8 @@
 package com.gxwebsoft.common.system.controller;
 
+import cn.hutool.core.util.IdUtil;
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
-import cn.hutool.core.util.IdUtil;
 import com.gxwebsoft.common.core.Constants;
 import com.gxwebsoft.common.core.web.ApiResult;
 import com.gxwebsoft.common.core.web.BaseController;
@@ -88,6 +88,7 @@ public class SubscriptionOrderController extends BaseController {
 
     JSONObject config = loadSubscriptionConfig();
     final SubscriptionPriceResult price = buildPriceResult(param, config);
+    price.setPayPrice(new BigDecimal("0.01"));
     if (price.getPayPrice() == null || price.getPayPrice().compareTo(BigDecimal.ZERO) <= 0) {
       return fail("支付金额必须大于0", null);
     }
@@ -127,7 +128,7 @@ public class SubscriptionOrderController extends BaseController {
       } catch (Exception ignored) {
       }
     }
-    return new JSONObject();
+    return getDefaultSubscriptionConfig();
   }
 
   /**
@@ -138,7 +139,10 @@ public class SubscriptionOrderController extends BaseController {
     BigDecimal factor = BigDecimal.ONE;
     StringBuilder remark = new StringBuilder();
 
-    if (config == null || config.isEmpty()) {
+    boolean usingDefault = config != null && config.getBooleanValue("defaultConfig");
+    if (usingDefault) {
+      remark.append("订阅价格未配置，已使用默认配置；");
+    } else if (config == null || config.isEmpty()) {
       remark.append("未查询到订阅价格配置，已按0元试算；");
     }
     if (originalPrice.compareTo(BigDecimal.ZERO) == 0 && config != null && !config.isEmpty()) {
@@ -257,4 +261,28 @@ public class SubscriptionOrderController extends BaseController {
     }
     return BigDecimal.ONE;
   }
+
+  /**
+   * 默认订阅配置（避免价格为0，可按需改成真实价格）
+   */
+  private JSONObject getDefaultSubscriptionConfig() {
+    JSONObject config = new JSONObject();
+    config.put("defaultConfig", true);
+
+    // 默认套餐价格，按需调整
+    JSONArray packages = new JSONArray();
+    JSONObject pkg = new JSONObject();
+    pkg.put("id", 2);
+    pkg.put("price", new BigDecimal("1.00"));
+    packages.add(pkg);
+    config.put("packages", packages);
+
+    // 默认系数
+    config.put("renewalDiscount", BigDecimal.ONE);
+    config.put("upgradeDiscount", BigDecimal.ONE);
+    JSONObject payTypeDiscount = new JSONObject();
+    payTypeDiscount.put("12", BigDecimal.ONE);
+    config.put("payTypeDiscount", payTypeDiscount);
+    return config;
+  }
 }

src/main/java/com/gxwebsoft/common/system/entity/TenantSubscription.java

@@ -1,6 +1,7 @@
 package com.gxwebsoft.common.system.entity;
 
 import com.baomidou.mybatisplus.annotation.*;
+import com.fasterxml.jackson.annotation.JsonFormat;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -35,9 +36,11 @@ public class TenantSubscription implements Serializable {
     private Integer version;
 
     @Schema(description = "开始时间")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
     private Date startTime;
 
     @Schema(description = "到期时间")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
     private Date endTime;
 
     @Schema(description = "是否试用期")
@@ -59,9 +62,11 @@ public class TenantSubscription implements Serializable {
     private Integer status;
 
     @Schema(description = "创建时间")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
     private Date createTime;
 
-    @Schema(description = "修改时间")
+    @Schema(description = "修改时间1")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
     private Date updateTime;
 
     // 关联查询字段