feat(shop): 增强订单查询功能

- 在订单查询中增加用户昵称搜索功能- 优化订单关键词搜索逻辑，支持昵称和电话号码搜索- 扩展退款/售后状态的订单查询范围
-调整订单状态查询条件，提高查询准确性

src/main/java/com/gxwebsoft/shop/mapper/xml/ShopOrderMapper.xml

@@ -57,7 +57,10 @@
                 AND a.real_name LIKE CONCAT('%', #{param.realName}, '%')
             </if>
             <if test="param.phone != null">
-                AND a.phone LIKE CONCAT('%', #{param.phone}, '%')
+                AND b.phone LIKE CONCAT('%', #{param.phone}, '%')
+            </if>
+            <if test="param.nickname != null">
+              AND b.nickname LIKE CONCAT('%', #{param.nickname}, '%')
             </if>
             <if test="param.addressId != null">
               AND a.address_id = #{param.addressId}
@@ -211,9 +214,11 @@
             </if>
             <if test="param.keywords != null">
               AND (a.order_no LIKE CONCAT('%', #{param.keywords}, '%')
-              OR b.phone = #{param.keywords}
-              OR a.order_id = #{param.keywords}
               OR a.comments LIKE CONCAT('%', #{param.keywords}, '%')
+              OR a.order_id = #{param.keywords}
+              OR b.phone = #{param.keywords}
+              OR b.phone = #{param.keywords}
+              OR b.nickname LIKE CONCAT('%', #{param.keywords}, '%')
               )
             </if>
             <!-- 订单状态筛选：-1全部，0待支付，1待发货，2待核销，3待收货，4待评价，5已完成，6已退款，7已删除 -->
@@ -243,8 +248,8 @@
                 AND a.order_status = 1
               </if>
               <if test="param.statusFilter == 6">
-                <!-- 6已退款：订单状态为退款成功 -->
-                AND a.order_status = 6
+                <!-- 6退款/售后：订单状态为退款成功 -->
+                AND (a.order_status = 4 OR a.order_status = 5 OR a.order_status = 6 OR a.order_status = 7)
               </if>
               <if test="param.statusFilter == 7">
                 <!-- 7已删除：订单被删除 -->

src/main/java/com/gxwebsoft/shop/param/ShopOrderParam.java

@@ -234,6 +234,10 @@ public class ShopOrderParam extends BaseParam {
     @QueryField(type = QueryType.EQ)
     private Integer userId;
 
+    @Schema(description = "用户昵称")
+    @QueryField(type = QueryType.LIKE)
+    private String nickname;
+
     @Schema(description = "备注")
     private String comments;