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

tests/integration/role_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/break/junhong_cmp_fiber/internal/bootstrap"
 	"github.com/break/junhong_cmp_fiber/internal/handler/admin"
 	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/internal/model/dto"
 	"github.com/break/junhong_cmp_fiber/internal/routes"
 	roleService "github.com/break/junhong_cmp_fiber/internal/service/role"
 	postgresStore "github.com/break/junhong_cmp_fiber/internal/store/postgres"
@@ -165,7 +166,7 @@ func TestRoleAPI_Create(t *testing.T) {
 	})
 
 	t.Run("成功创建角色", func(t *testing.T) {
-		reqBody := model.CreateRoleRequest{
+		reqBody := dto.CreateRoleRequest{
 			RoleName: "测试角色",
 			RoleDesc: "这是一个测试角色",
 			RoleType: constants.RoleTypePlatform,
@@ -277,7 +278,7 @@ func TestRoleAPI_Update(t *testing.T) {
 
 	t.Run("成功更新角色", func(t *testing.T) {
 		newName := "更新后角色"
-		reqBody := model.UpdateRoleRequest{
+		reqBody := dto.UpdateRoleRequest{
 			RoleName: &newName,
 		}
 
@@ -398,7 +399,7 @@ func TestRoleAPI_AssignPermissions(t *testing.T) {
 	env.db.Create(testPerm)
 
 	t.Run("成功分配权限", func(t *testing.T) {
-		reqBody := model.AssignPermissionsRequest{
+		reqBody := dto.AssignPermissionsRequest{
 			PermIDs: []uint{testPerm.ID},
 		}
 
@@ -540,7 +541,7 @@ func TestRoleAPI_UpdateStatus(t *testing.T) {
 	env.db.Create(testRole)
 
 	t.Run("成功禁用角色", func(t *testing.T) {
-		reqBody := model.UpdateRoleStatusRequest{
+		reqBody := dto.UpdateRoleStatusRequest{
 			Status: constants.StatusDisabled,
 		}
 
@@ -564,7 +565,7 @@ func TestRoleAPI_UpdateStatus(t *testing.T) {
 	})
 
 	t.Run("成功启用角色", func(t *testing.T) {
-		reqBody := model.UpdateRoleStatusRequest{
+		reqBody := dto.UpdateRoleStatusRequest{
 			Status: constants.StatusEnabled,
 		}
 
@@ -588,7 +589,7 @@ func TestRoleAPI_UpdateStatus(t *testing.T) {
 	})
 
 	t.Run("角色不存在返回错误", func(t *testing.T) {
-		reqBody := model.UpdateRoleStatusRequest{
+		reqBody := dto.UpdateRoleStatusRequest{
 			Status: constants.StatusEnabled,
 		}