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/platform_account_test.go

@@ -14,6 +14,7 @@ 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"
 	accountService "github.com/break/junhong_cmp_fiber/internal/service/account"
 	postgresStore "github.com/break/junhong_cmp_fiber/internal/store/postgres"
@@ -147,7 +148,7 @@ func TestPlatformAccountAPI_UpdatePassword(t *testing.T) {
 	db.Create(testAccount)
 
 	t.Run("成功修改密码", func(t *testing.T) {
-		reqBody := model.UpdatePasswordRequest{
+		reqBody := dto.UpdatePasswordRequest{
 			NewPassword: "NewPassword@123",
 		}
 		jsonBody, _ := json.Marshal(reqBody)
@@ -169,7 +170,7 @@ func TestPlatformAccountAPI_UpdatePassword(t *testing.T) {
 	})
 
 	t.Run("账号不存在返回错误", func(t *testing.T) {
-		reqBody := model.UpdatePasswordRequest{
+		reqBody := dto.UpdatePasswordRequest{
 			NewPassword: "NewPassword@123",
 		}
 		jsonBody, _ := json.Marshal(reqBody)
@@ -221,7 +222,7 @@ func TestPlatformAccountAPI_UpdateStatus(t *testing.T) {
 	db.Create(testAccount)
 
 	t.Run("成功禁用账号", func(t *testing.T) {
-		reqBody := model.UpdateStatusRequest{
+		reqBody := dto.UpdateStatusRequest{
 			Status: constants.StatusDisabled,
 		}
 		jsonBody, _ := json.Marshal(reqBody)
@@ -238,7 +239,7 @@ func TestPlatformAccountAPI_UpdateStatus(t *testing.T) {
 	})
 
 	t.Run("成功启用账号", func(t *testing.T) {
-		reqBody := model.UpdateStatusRequest{
+		reqBody := dto.UpdateStatusRequest{
 			Status: constants.StatusEnabled,
 		}
 		jsonBody, _ := json.Marshal(reqBody)
@@ -306,7 +307,7 @@ func TestPlatformAccountAPI_AssignRoles(t *testing.T) {
 	db.Create(testRole)
 
 	t.Run("超级管理员禁止分配角色", func(t *testing.T) {
-		reqBody := model.AssignRolesRequest{
+		reqBody := dto.AssignRolesRequest{
 			RoleIDs: []uint{testRole.ID},
 		}
 		jsonBody, _ := json.Marshal(reqBody)
@@ -324,7 +325,7 @@ func TestPlatformAccountAPI_AssignRoles(t *testing.T) {
 	})
 
 	t.Run("平台用户成功分配角色", func(t *testing.T) {
-		reqBody := model.AssignRolesRequest{
+		reqBody := dto.AssignRolesRequest{
 			RoleIDs: []uint{testRole.ID},
 		}
 		jsonBody, _ := json.Marshal(reqBody)
@@ -341,7 +342,7 @@ func TestPlatformAccountAPI_AssignRoles(t *testing.T) {
 	})
 
 	t.Run("空数组清空所有角色", func(t *testing.T) {
-		reqBody := model.AssignRolesRequest{
+		reqBody := dto.AssignRolesRequest{
 			RoleIDs: []uint{},
 		}
 		jsonBody, _ := json.Marshal(reqBody)