refactor: Step 0.2 — App Service 层子包拆分（product 子包）

将 6 组商品相关 App Service 接口/实现从 service/ 及 service/impl/
移至 service/product/ 及 service/product/impl/：
- CustomProductInfoService / CustomProductItemService
- ProductTemplateInfoService / SysBillRuleService
- LogCustomProductService / DiyUserService

纯移动+重命名，无逻辑变更。

Co-Authored-By: Claude <noreply@anthropic.com>

custom-server-app/src/main/java/com/jomalls/custom/app/service/CustomProductInfoService.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/CustomProductInfoService.java

-package com.jomalls.custom.app.service;
+package com.jomalls.custom.app.service.product;
 
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.jomalls.custom.app.dto.*;

custom-server-app/src/main/java/com/jomalls/custom/app/service/CustomProductItemService.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/CustomProductItemService.java

-package com.jomalls.custom.app.service;
+package com.jomalls.custom.app.service.product;
 
 import com.jomalls.custom.app.dto.UpdateSalesPriceSnakeDTO;
 import com.jomalls.custom.app.vo.CustomProductItemSnakeVO;

custom-server-app/src/main/java/com/jomalls/custom/app/service/DiyUserService.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/DiyUserService.java

-package com.jomalls.custom.app.service;
+package com.jomalls.custom.app.service.product;
 
 import com.jomalls.custom.app.vo.*;
 import com.jomalls.custom.dal.entity.DbDiyUserEntity;

custom-server-app/src/main/java/com/jomalls/custom/app/service/LogCustomProductService.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/LogCustomProductService.java

-package com.jomalls.custom.app.service;
+package com.jomalls.custom.app.service.product;
 
 import com.jomalls.custom.app.vo.LogCustomProductSnakeVO;
 

custom-server-app/src/main/java/com/jomalls/custom/app/service/ProductTemplateInfoService.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/ProductTemplateInfoService.java

-package com.jomalls.custom.app.service;
+package com.jomalls.custom.app.service.product;
 
 import com.jomalls.custom.app.vo.BindDetailVO;
 import com.jomalls.custom.app.vo.ProductTemplateInfoSnakeVO;

custom-server-app/src/main/java/com/jomalls/custom/app/service/SysBillRuleService.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/SysBillRuleService.java

-package com.jomalls.custom.app.service;
+package com.jomalls.custom.app.service.product;
 
 /**
  * 单号规则 App Service 接口

custom-server-app/src/main/java/com/jomalls/custom/app/service/impl/CustomProductInfoServiceImpl.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/impl/CustomProductInfoServiceImpl.java

-package com.jomalls.custom.app.service.impl;
+package com.jomalls.custom.app.service.product.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
@@ -10,9 +10,9 @@ import com.jomalls.custom.app.enums.ProcessingStatus;
 import com.jomalls.custom.app.enums.SkuGenerateEnums;
 import com.jomalls.custom.app.enums.TemplateStatus;
 import com.jomalls.custom.app.exception.ServiceException;
-import com.jomalls.custom.app.service.CustomProductInfoService;
-import com.jomalls.custom.app.service.DiyUserService;
-import com.jomalls.custom.app.service.SysBillRuleService;
+import com.jomalls.custom.app.service.product.CustomProductInfoService;
+import com.jomalls.custom.app.service.product.DiyUserService;
+import com.jomalls.custom.app.service.product.SysBillRuleService;
 import com.jomalls.custom.app.utils.BeanMapper;
 import com.jomalls.custom.app.utils.CustomAsserts;
 import com.jomalls.custom.app.vo.*;

custom-server-app/src/main/java/com/jomalls/custom/app/service/impl/CustomProductItemServiceImpl.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/impl/CustomProductItemServiceImpl.java

-package com.jomalls.custom.app.service.impl;
+package com.jomalls.custom.app.service.product.impl;
 
 import com.jomalls.custom.app.constant.Constants;
 import com.jomalls.custom.app.dto.UpdateSalesPriceSnakeDTO;
 import com.jomalls.custom.app.exception.ServiceException;
-import com.jomalls.custom.app.service.CustomProductItemService;
-import com.jomalls.custom.app.service.DiyUserService;
+import com.jomalls.custom.app.service.product.CustomProductItemService;
+import com.jomalls.custom.app.service.product.DiyUserService;
 import com.jomalls.custom.app.utils.BeanMapper;
 import com.jomalls.custom.app.vo.*;
 import com.jomalls.custom.dal.entity.*;

custom-server-app/src/main/java/com/jomalls/custom/app/service/impl/DiyUserServiceImpl.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/impl/DiyUserServiceImpl.java

-package com.jomalls.custom.app.service.impl;
+package com.jomalls.custom.app.service.product.impl;
 
-import com.jomalls.custom.app.service.DiyUserService;
+import com.jomalls.custom.app.service.product.DiyUserService;
 import com.jomalls.custom.app.vo.*;
 import com.jomalls.custom.dal.entity.DbDiyUserEntity;
 import com.jomalls.custom.domain.service.DbDiyUserDomainService;

custom-server-app/src/main/java/com/jomalls/custom/app/service/impl/LogCustomProductServiceImpl.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/impl/LogCustomProductServiceImpl.java

-package com.jomalls.custom.app.service.impl;
+package com.jomalls.custom.app.service.product.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.jomalls.custom.app.vo.LogCustomProductSnakeVO;
-import com.jomalls.custom.app.service.LogCustomProductService;
+import com.jomalls.custom.app.service.product.LogCustomProductService;
 import com.jomalls.custom.app.utils.BeanMapper;
 import com.jomalls.custom.app.utils.CustomAsserts;
 import com.jomalls.custom.dal.entity.LogCustomProductEntity;

custom-server-app/src/main/java/com/jomalls/custom/app/service/impl/ProductTemplateInfoServiceImpl.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/impl/ProductTemplateInfoServiceImpl.java

-package com.jomalls.custom.app.service.impl;
+package com.jomalls.custom.app.service.product.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.jomalls.custom.app.constant.Constants;
 import com.jomalls.custom.app.exception.ServiceException;
-import com.jomalls.custom.app.service.ProductTemplateInfoService;
+import com.jomalls.custom.app.service.product.ProductTemplateInfoService;
 import com.jomalls.custom.app.utils.BeanMapper;
 import com.jomalls.custom.app.utils.CustomAsserts;
 import com.jomalls.custom.app.vo.*;

custom-server-app/src/main/java/com/jomalls/custom/app/service/impl/SysBillRuleServiceImpl.java → custom-server-app/src/main/java/com/jomalls/custom/app/service/product/impl/SysBillRuleServiceImpl.java

-package com.jomalls.custom.app.service.impl;
+package com.jomalls.custom.app.service.product.impl;
 
 import com.jomalls.custom.app.enums.SkuGenerateEnums;
 import com.jomalls.custom.app.exception.ServiceException;
-import com.jomalls.custom.app.service.SysBillRuleService;
+import com.jomalls.custom.app.service.product.SysBillRuleService;
 import com.jomalls.custom.app.utils.CustomAsserts;
 import com.jomalls.custom.dal.entity.SysBillRuleEntity;
 import com.jomalls.custom.domain.service.SysBillRuleDomainService;

custom-server-webapp/src/main/java/com/jomalls/custom/webapp/controller/product/CustomProductInfoController.java

@@ -3,7 +3,7 @@ package com.jomalls.custom.webapp.controller.product;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.jomalls.custom.app.dto.*;
 import com.jomalls.custom.app.enums.CustomProductInfoStatusEnum;
-import com.jomalls.custom.app.service.CustomProductInfoService;
+import com.jomalls.custom.app.service.product.CustomProductInfoService;
 import com.jomalls.custom.app.vo.CustomProductInfoPageSnakeVO;
 import com.jomalls.custom.app.vo.CustomProductInfoSnakeVO;
 import com.jomalls.custom.app.vo.CraftCenterSnakeVO;

custom-server-webapp/src/main/java/com/jomalls/custom/webapp/controller/product/CustomProductItemController.java

@@ -2,7 +2,7 @@ package com.jomalls.custom.webapp.controller.product;
 
 import com.jomalls.custom.app.constant.Constants;
 import com.jomalls.custom.app.dto.UpdateSalesPriceSnakeDTO;
-import com.jomalls.custom.app.service.CustomProductItemService;
+import com.jomalls.custom.app.service.product.CustomProductItemService;
 import com.jomalls.custom.app.vo.CustomProductItemSnakeVO;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;

custom-server-webapp/src/main/java/com/jomalls/custom/webapp/controller/product/LogCustomProductController.java

 package com.jomalls.custom.webapp.controller.product;
 
-import com.jomalls.custom.app.service.LogCustomProductService;
+import com.jomalls.custom.app.service.product.LogCustomProductService;
 import com.jomalls.custom.app.vo.LogCustomProductSnakeVO;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;

custom-server-webapp/src/main/java/com/jomalls/custom/webapp/controller/product/ProductTemplateInfoController.java

 package com.jomalls.custom.webapp.controller.product;
 
-import com.jomalls.custom.app.service.ProductTemplateInfoService;
+import com.jomalls.custom.app.service.product.ProductTemplateInfoService;
 import com.jomalls.custom.app.vo.BindDetailVO;
 import com.jomalls.custom.app.vo.ProductTemplateInfoSnakeVO;
 import io.swagger.v3.oas.annotations.Operation;

custom-server-webapp/src/main/java/com/jomalls/custom/webapp/controller/product/SysBillRuleController.java

 package com.jomalls.custom.webapp.controller.product;
 
-import com.jomalls.custom.app.service.SysBillRuleService;
+import com.jomalls.custom.app.service.product.SysBillRuleService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;