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

@@ -2,10 +2,15 @@ package com.gxwebsoft.common.system.controller;
 
 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;
+import com.gxwebsoft.common.system.entity.Order;
 import com.gxwebsoft.common.system.entity.User;
 import com.gxwebsoft.common.system.param.SubscriptionOrderParam;
+import com.gxwebsoft.common.system.result.SubscriptionOrderCreateResult;
+import com.gxwebsoft.common.system.result.SubscriptionOrderPayResult;
 import com.gxwebsoft.common.system.result.SubscriptionPriceResult;
 import com.gxwebsoft.common.system.service.SettingService;
 import io.swagger.v3.oas.annotations.Operation;
@@ -31,6 +36,8 @@ public class SubscriptionOrderController extends BaseController {
 
   @Resource
   private SettingService settingService;
+  @Resource
+  private WxNativePayController wxNativePayController;
 
   @Operation(summary = "计算订阅订单价格")
   @PostMapping("/calculate-price")
@@ -48,6 +55,64 @@ public class SubscriptionOrderController extends BaseController {
     return success(result);
   }
 
+  @Operation(summary = "创建订阅订单")
+  @PostMapping("/create")
+  public ApiResult<SubscriptionOrderCreateResult> create(@RequestBody SubscriptionOrderParam param) {
+    final User loginUser = getLoginUser();
+    if (loginUser == null) {
+      return fail("请先登录", null);
+    }
+    if (param.getPackageId() == null) {
+      return fail("套餐ID不能为空", null);
+    }
+
+    JSONObject config = loadSubscriptionConfig();
+    final SubscriptionPriceResult price = buildPriceResult(param, config);
+
+    SubscriptionOrderCreateResult result = new SubscriptionOrderCreateResult();
+    result.setOrderNo(IdUtil.getSnowflakeNextIdStr());
+    result.setPrice(price);
+    return success(result);
+  }
+
+  @Operation(summary = "订阅订单支付（生成微信Native二维码）")
+  @PostMapping("/pay")
+  public ApiResult<SubscriptionOrderPayResult> pay(@RequestBody SubscriptionOrderParam param) {
+    final User loginUser = getLoginUser();
+    if (loginUser == null) {
+      return fail("请先登录", null);
+    }
+    if (param.getPackageId() == null) {
+      return fail("套餐ID不能为空", null);
+    }
+
+    JSONObject config = loadSubscriptionConfig();
+    final SubscriptionPriceResult price = buildPriceResult(param, config);
+    if (price.getPayPrice() == null || price.getPayPrice().compareTo(BigDecimal.ZERO) <= 0) {
+      return fail("支付金额必须大于0", null);
+    }
+
+    // 构造订单用于生成支付二维码
+    Order order = new Order();
+    order.setPayPrice(price.getPayPrice());
+    order.setTotalPrice(price.getTotalPrice());
+    order.setComments("订阅套餐-" + param.getPackageId());
+    order.setPayType(param.getPayType());
+    order.setUserId(loginUser.getUserId());
+    order.setTenantId(loginUser.getTenantId());
+
+    ApiResult<?> payResp = wxNativePayController.getCodeUrl(order);
+    if (payResp.getCode() == null || !payResp.getCode().equals(Constants.RESULT_OK_CODE)) {
+      return fail(payResp.getMessage(), null);
+    }
+
+    SubscriptionOrderPayResult result = new SubscriptionOrderPayResult();
+    result.setOrderNo(order.getOrderNo());
+    result.setCodeUrl(String.valueOf(payResp.getData()));
+    result.setPrice(price);
+    return success(result);
+  }
+
   /**
    * 从配置表读取订阅套餐配置（尝试多种key以兼容历史数据）
    */

src/main/java/com/gxwebsoft/common/system/result/SubscriptionOrderCreateResult.java

@@ -0,0 +1,18 @@
+package com.gxwebsoft.common.system.result;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+/**
+ * 订阅订单创建结果
+ */
+@Data
+@Schema(description = "订阅订单创建结果")
+public class SubscriptionOrderCreateResult {
+
+  @Schema(description = "订单号")
+  private String orderNo;
+
+  @Schema(description = "价格试算结果")
+  private SubscriptionPriceResult price;
+}

src/main/java/com/gxwebsoft/common/system/result/SubscriptionOrderPayResult.java

@@ -0,0 +1,21 @@
+package com.gxwebsoft.common.system.result;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+/**
+ * 订阅订单支付结果
+ */
+@Data
+@Schema(description = "订阅订单支付结果")
+public class SubscriptionOrderPayResult {
+
+  @Schema(description = "订单号")
+  private String orderNo;
+
+  @Schema(description = "支付二维码链接")
+  private String codeUrl;
+
+  @Schema(description = "价格信息")
+  private SubscriptionPriceResult price;
+}