feat(pricing): 增加景区优惠券统计功能并优化优惠券使用逻辑

- 新增景区优惠券统计接口和相关查询方法
- 为优惠券配置和使用记录添加景区ID字段
- 实现优惠券使用时的景区限制检查
- 优化优惠券适用性的判断逻辑，增加对景区和商品类型的检查

src/main/java/com/ycwl/basic/pricing/mapper/PriceCouponConfigMapper.java

@@ -44,10 +44,10 @@ public interface PriceCouponConfigMapper extends BaseMapper<PriceCouponConfig> {
      */
     @Insert("INSERT INTO price_coupon_config (coupon_name, coupon_type, discount_value, min_amount, " +
             "max_discount, applicable_products, total_quantity, used_quantity, valid_from, valid_until, " +
-            "is_active, created_time, updated_time) VALUES " +
+            "is_active, scenic_id, created_time, updated_time) VALUES " +
             "(#{couponName}, #{couponType}, #{discountValue}, #{minAmount}, #{maxDiscount}, " +
             "#{applicableProducts}, #{totalQuantity}, #{usedQuantity}, #{validFrom}, #{validUntil}, " +
-            "#{isActive}, NOW(), NOW())")
+            "#{isActive}, #{scenicId}, NOW(), NOW())")
     int insertCoupon(PriceCouponConfig coupon);
     
     /**
@@ -57,7 +57,7 @@ public interface PriceCouponConfigMapper extends BaseMapper<PriceCouponConfig> {
             "discount_value = #{discountValue}, min_amount = #{minAmount}, max_discount = #{maxDiscount}, " +
             "applicable_products = #{applicableProducts}, total_quantity = #{totalQuantity}, " +
             "valid_from = #{validFrom}, valid_until = #{validUntil}, is_active = #{isActive}, " +
-            "updated_time = NOW() WHERE id = #{id}")
+            "scenic_id = #{scenicId}, updated_time = NOW() WHERE id = #{id}")
     int updateCoupon(PriceCouponConfig coupon);
     
     // ==================== 管理端接口 ====================
@@ -80,11 +80,15 @@ public interface PriceCouponConfigMapper extends BaseMapper<PriceCouponConfig> {
             "<if test='couponName != null and couponName != \"\"'>" +
             "AND coupon_name LIKE CONCAT('%', #{couponName}, '%')" +
             "</if>" +
+            "<if test='scenicId != null and scenicId != \"\"'>" +
+            "AND scenic_id = #{scenicId}" +
+            "</if>" +
             "</where>" +
             "ORDER BY created_time DESC" +
             "</script>")
     List<PriceCouponConfig> selectByConditionsForAdmin(@Param("isActive") Boolean isActive, 
-                                                       @Param("couponName") String couponName);
+                                                       @Param("couponName") String couponName,
+                                                       @Param("scenicId") String scenicId);
     
     /**
      * 管理端：根据状态查询优惠券配置
@@ -103,4 +107,30 @@ public interface PriceCouponConfigMapper extends BaseMapper<PriceCouponConfig> {
      */
     @Update("UPDATE price_coupon_config SET deleted = 1, updated_time = NOW() WHERE id = #{id}")
     int deleteCoupon(Long id);
+    
+    /**
+     * 查询指定景区的有效优惠券配置
+     */
+    @Select("SELECT * FROM price_coupon_config WHERE is_active = 1 " +
+            "AND valid_from <= NOW() AND valid_until > NOW() " +
+            "AND used_quantity < total_quantity " +
+            "AND (scenic_id IS NULL OR scenic_id = #{scenicId})")
+    List<PriceCouponConfig> selectValidCouponsByScenicId(@Param("scenicId") String scenicId);
+    
+    /**
+     * 管理端：根据景区ID查询优惠券配置
+     */
+    @Select("SELECT * FROM price_coupon_config WHERE scenic_id = #{scenicId} ORDER BY created_time DESC")
+    List<PriceCouponConfig> selectByScenicIdForAdmin(@Param("scenicId") String scenicId);
+    
+    /**
+     * 统计景区优惠券配置数量
+     */
+    @Select("SELECT " +
+            "COUNT(*) as total_coupons, " +
+            "COUNT(CASE WHEN is_active = 1 THEN 1 END) as active_coupons, " +
+            "SUM(total_quantity) as total_quantity, " +
+            "SUM(used_quantity) as used_quantity " +
+            "FROM price_coupon_config WHERE scenic_id = #{scenicId}")
+    java.util.Map<String, Object> selectScenicCouponConfigStats(@Param("scenicId") String scenicId);
 }