feat(order): 添加退款原因字段并更新相关实体和控制器

- 在 ThinkOrderParam、ThinkOrderRefundLog、ThinkOrderRefundLogController 和 ThinkOrderRefundLogParam 中添加退款原因（refundReason）字段
- 更新 ThinkOrderRefundLogController 中的 refund 方法，将退款原因保存到订单中
-为所有新增字段添加 @ApiModelProperty 注解，用于 Swagger 文档生成

src/main/java/com/gxwebsoft/think/controller/ThinkOrderRefundLogController.java

@@ -154,6 +154,7 @@ public class ThinkOrderRefundLogController extends BaseController {
             thinkOrderRefundLog.setRefundNo("R" + thinkOrder.getOrderNum());
             thinkOrderRefundLog.setCreateTime(LocalDateTimeUtil.now());
             thinkOrder.setOrderStatus(4);
+            thinkOrder.setRefundReason(thinkOrderRefundLog.getRefundReason());
             thinkOrderService.updateById(thinkOrder);
             if (thinkOrder.getPayType().equals(1)) {
                 if (thinkOrder.getWechatOrder() != null

src/main/java/com/gxwebsoft/think/entity/ThinkOrderRefundLog.java

@@ -42,6 +42,9 @@ public class ThinkOrderRefundLog implements Serializable {
     @ApiModelProperty(value = "退款金额")
     private BigDecimal refundAmount;
 
+    @ApiModelProperty(value = "退款原因")
+    private String refundReason;
+
     @ApiModelProperty(value = "订单ID")
     private Integer oid;
 

src/main/java/com/gxwebsoft/think/param/ThinkOrderParam.java

@@ -95,6 +95,9 @@ public class ThinkOrderParam extends BaseParam {
     @QueryField(type = QueryType.EQ)
     private BigDecimal refundMoney;
 
+    @ApiModelProperty(value = "退款原因")
+    private String refundReason;
+
     @ApiModelProperty(value = "教练价格")
     @QueryField(type = QueryType.EQ)
     private BigDecimal coachPrice;

src/main/java/com/gxwebsoft/think/param/ThinkOrderRefundLogParam.java

@@ -47,4 +47,7 @@ public class ThinkOrderRefundLogParam extends BaseParam {
     @QueryField(type = QueryType.EQ)
     private Integer status;
 
+    @ApiModelProperty(value = "退款原因")
+    private String refundReason;
+
 }