refactor: 将 DTO 文件从 internal/model 移动到 internal/model/dto 目录

- 移动 17 个 DTO 文件到 internal/model/dto/ 目录
- 更新所有 DTO 文件的 package 声明从 model 改为 dto
- 更新所有引用文件的 import 和类型引用
  - Handler 层：admin 和 h5 所有处理器
  - Service 层：所有业务服务
  - Routes 层：所有路由定义
  - Tests 层：单元测试和集成测试
- 清理未使用的 import 语句
- 验证：项目构建成功，测试编译通过，LSP 无错误

internal/service/enterprise/service.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/internal/model/dto"
 	"github.com/break/junhong_cmp_fiber/internal/store"
 	"github.com/break/junhong_cmp_fiber/internal/store/postgres"
 	"github.com/break/junhong_cmp_fiber/pkg/constants"
@@ -30,7 +31,7 @@ func New(db *gorm.DB, enterpriseStore *postgres.EnterpriseStore, shopStore *post
 	}
 }
 
-func (s *Service) Create(ctx context.Context, req *model.CreateEnterpriseReq) (*model.CreateEnterpriseResp, error) {
+func (s *Service) Create(ctx context.Context, req *dto.CreateEnterpriseReq) (*dto.CreateEnterpriseResp, error) {
 	currentUserID := middleware.GetUserIDFromContext(ctx)
 	if currentUserID == 0 {
 		return nil, errors.New(errors.CodeUnauthorized, "未授权访问")
@@ -114,8 +115,8 @@ func (s *Service) Create(ctx context.Context, req *model.CreateEnterpriseReq) (*
 		}
 	}
 
-	return &model.CreateEnterpriseResp{
-		Enterprise: model.EnterpriseItem{
+	return &dto.CreateEnterpriseResp{
+		Enterprise: dto.EnterpriseItem{
 			ID:              enterprise.ID,
 			EnterpriseName:  enterprise.EnterpriseName,
 			EnterpriseCode:  enterprise.EnterpriseCode,
@@ -139,7 +140,7 @@ func (s *Service) Create(ctx context.Context, req *model.CreateEnterpriseReq) (*
 }
 
 // Update 更新企业信息
-func (s *Service) Update(ctx context.Context, id uint, req *model.UpdateEnterpriseRequest) (*model.Enterprise, error) {
+func (s *Service) Update(ctx context.Context, id uint, req *dto.UpdateEnterpriseRequest) (*model.Enterprise, error) {
 	// 获取当前用户 ID
 	currentUserID := middleware.GetUserIDFromContext(ctx)
 	if currentUserID == 0 {
@@ -262,7 +263,7 @@ func (s *Service) GetByID(ctx context.Context, id uint) (*model.Enterprise, erro
 	return enterprise, nil
 }
 
-func (s *Service) List(ctx context.Context, req *model.EnterpriseListReq) (*model.EnterprisePageResult, error) {
+func (s *Service) List(ctx context.Context, req *dto.EnterpriseListReq) (*dto.EnterprisePageResult, error) {
 	opts := &store.QueryOptions{
 		Page:     req.Page,
 		PageSize: req.PageSize,
@@ -322,13 +323,13 @@ func (s *Service) List(ctx context.Context, req *model.EnterpriseListReq) (*mode
 		}
 	}
 
-	items := make([]model.EnterpriseItem, 0, len(enterprises))
+	items := make([]dto.EnterpriseItem, 0, len(enterprises))
 	for _, e := range enterprises {
 		ownerShopName := ""
 		if e.OwnerShopID != nil {
 			ownerShopName = shopMap[*e.OwnerShopID]
 		}
-		items = append(items, model.EnterpriseItem{
+		items = append(items, dto.EnterpriseItem{
 			ID:              e.ID,
 			EnterpriseName:  e.EnterpriseName,
 			EnterpriseCode:  e.EnterpriseCode,
@@ -349,7 +350,7 @@ func (s *Service) List(ctx context.Context, req *model.EnterpriseListReq) (*mode
 		})
 	}
 
-	return &model.EnterprisePageResult{
+	return &dto.EnterprisePageResult{
 		Items: items,
 		Total: total,
 		Page:  opts.Page,