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/routes/h5.go

@@ -4,7 +4,7 @@ import (
 	"github.com/gofiber/fiber/v2"
 
 	"github.com/break/junhong_cmp_fiber/internal/bootstrap"
-	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/internal/model/dto"
 	"github.com/break/junhong_cmp_fiber/pkg/openapi"
 )
 
@@ -27,16 +27,16 @@ func registerH5AuthRoutes(router fiber.Router, handler interface{}, authMiddlewa
 	Register(router, doc, basePath, "POST", "/login", h.Login, RouteSpec{
 		Summary: "H5 登录",
 		Tags:    []string{"H5 认证"},
-		Input:   new(model.LoginRequest),
-		Output:  new(model.LoginResponse),
+		Input:   new(dto.LoginRequest),
+		Output:  new(dto.LoginResponse),
 		Auth:    false,
 	})
 
 	Register(router, doc, basePath, "POST", "/refresh-token", h.RefreshToken, RouteSpec{
 		Summary: "刷新 Token",
 		Tags:    []string{"H5 认证"},
-		Input:   new(model.RefreshTokenRequest),
-		Output:  new(model.RefreshTokenResponse),
+		Input:   new(dto.RefreshTokenRequest),
+		Output:  new(dto.RefreshTokenResponse),
 		Auth:    false,
 	})
 
@@ -54,14 +54,14 @@ func registerH5AuthRoutes(router fiber.Router, handler interface{}, authMiddlewa
 		Summary: "获取当前用户信息",
 		Tags:    []string{"H5 认证"},
 		Input:   nil,
-		Output:  new(model.UserInfo),
+		Output:  new(dto.UserInfo),
 		Auth:    true,
 	})
 
 	Register(authGroup, doc, basePath, "PUT", "/password", h.ChangePassword, RouteSpec{
 		Summary: "修改密码",
 		Tags:    []string{"H5 认证"},
-		Input:   new(model.ChangePasswordRequest),
+		Input:   new(dto.ChangePasswordRequest),
 		Output:  nil,
 		Auth:    true,
 	})