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/unit/enterprise_service_test.go

@@ -8,6 +8,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/internal/model/dto"
 	"github.com/break/junhong_cmp_fiber/internal/service/enterprise"
 	"github.com/break/junhong_cmp_fiber/internal/store/postgres"
 	"github.com/break/junhong_cmp_fiber/pkg/constants"
@@ -34,7 +35,7 @@ func TestEnterpriseService_Create(t *testing.T) {
 	t.Run("创建企业-含账号创建", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		req := &model.CreateEnterpriseReq{
+		req := &dto.CreateEnterpriseReq{
 			EnterpriseName: "测试企业",
 			EnterpriseCode: "ENT_TEST_001",
 			ContactName:    "测试联系人",
@@ -55,7 +56,7 @@ func TestEnterpriseService_Create(t *testing.T) {
 	t.Run("创建企业-企业编号已存在应失败", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		req1 := &model.CreateEnterpriseReq{
+		req1 := &dto.CreateEnterpriseReq{
 			EnterpriseName: "企业一",
 			EnterpriseCode: "ENT_DUP_001",
 			ContactName:    "联系人一",
@@ -66,7 +67,7 @@ func TestEnterpriseService_Create(t *testing.T) {
 		_, err := service.Create(ctx, req1)
 		require.NoError(t, err)
 
-		req2 := &model.CreateEnterpriseReq{
+		req2 := &dto.CreateEnterpriseReq{
 			EnterpriseName: "企业二",
 			EnterpriseCode: "ENT_DUP_001",
 			ContactName:    "联系人二",
@@ -81,7 +82,7 @@ func TestEnterpriseService_Create(t *testing.T) {
 	t.Run("创建企业-手机号已存在应失败", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		req1 := &model.CreateEnterpriseReq{
+		req1 := &dto.CreateEnterpriseReq{
 			EnterpriseName: "企业三",
 			EnterpriseCode: "ENT_PHONE_001",
 			ContactName:    "联系人三",
@@ -92,7 +93,7 @@ func TestEnterpriseService_Create(t *testing.T) {
 		_, err := service.Create(ctx, req1)
 		require.NoError(t, err)
 
-		req2 := &model.CreateEnterpriseReq{
+		req2 := &dto.CreateEnterpriseReq{
 			EnterpriseName: "企业四",
 			EnterpriseCode: "ENT_PHONE_002",
 			ContactName:    "联系人四",
@@ -107,7 +108,7 @@ func TestEnterpriseService_Create(t *testing.T) {
 	t.Run("创建企业-未授权用户应失败", func(t *testing.T) {
 		ctx := context.Background()
 
-		req := &model.CreateEnterpriseReq{
+		req := &dto.CreateEnterpriseReq{
 			EnterpriseName: "未授权企业",
 			EnterpriseCode: "ENT_UNAUTH_001",
 			ContactName:    "联系人",
@@ -134,7 +135,7 @@ func TestEnterpriseService_Update(t *testing.T) {
 	t.Run("编辑企业", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		createReq := &model.CreateEnterpriseReq{
+		createReq := &dto.CreateEnterpriseReq{
 			EnterpriseName: "待编辑企业",
 			EnterpriseCode: "ENT_EDIT_001",
 			ContactName:    "原联系人",
@@ -147,7 +148,7 @@ func TestEnterpriseService_Update(t *testing.T) {
 
 		newName := "编辑后企业"
 		newContact := "新联系人"
-		updateReq := &model.UpdateEnterpriseRequest{
+		updateReq := &dto.UpdateEnterpriseRequest{
 			EnterpriseName: &newName,
 			ContactName:    &newContact,
 		}
@@ -162,7 +163,7 @@ func TestEnterpriseService_Update(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
 		newName := "不存在企业"
-		updateReq := &model.UpdateEnterpriseRequest{
+		updateReq := &dto.UpdateEnterpriseRequest{
 			EnterpriseName: &newName,
 		}
 
@@ -184,7 +185,7 @@ func TestEnterpriseService_UpdateStatus(t *testing.T) {
 	t.Run("禁用企业-账号同步禁用", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		createReq := &model.CreateEnterpriseReq{
+		createReq := &dto.CreateEnterpriseReq{
 			EnterpriseName: "待禁用企业",
 			EnterpriseCode: "ENT_STATUS_001",
 			ContactName:    "联系人",
@@ -211,7 +212,7 @@ func TestEnterpriseService_UpdateStatus(t *testing.T) {
 	t.Run("启用企业-账号同步启用", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		createReq := &model.CreateEnterpriseReq{
+		createReq := &dto.CreateEnterpriseReq{
 			EnterpriseName: "待启用企业",
 			EnterpriseCode: "ENT_STATUS_002",
 			ContactName:    "联系人",
@@ -259,7 +260,7 @@ func TestEnterpriseService_UpdatePassword(t *testing.T) {
 	t.Run("修改企业账号密码", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		createReq := &model.CreateEnterpriseReq{
+		createReq := &dto.CreateEnterpriseReq{
 			EnterpriseName: "密码测试企业",
 			EnterpriseCode: "ENT_PWD_001",
 			ContactName:    "联系人",
@@ -301,7 +302,7 @@ func TestEnterpriseService_List(t *testing.T) {
 	t.Run("查询企业列表-空结果", func(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
-		req := &model.EnterpriseListReq{
+		req := &dto.EnterpriseListReq{
 			Page:     1,
 			PageSize: 20,
 		}
@@ -316,7 +317,7 @@ func TestEnterpriseService_List(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
 		for i := 0; i < 3; i++ {
-			createReq := &model.CreateEnterpriseReq{
+			createReq := &dto.CreateEnterpriseReq{
 				EnterpriseName: "列表测试企业",
 				EnterpriseCode: "ENT_LIST_" + string(rune('A'+i)),
 				ContactName:    "联系人",
@@ -328,7 +329,7 @@ func TestEnterpriseService_List(t *testing.T) {
 			require.NoError(t, err)
 		}
 
-		req := &model.EnterpriseListReq{
+		req := &dto.EnterpriseListReq{
 			Page:           1,
 			PageSize:       20,
 			EnterpriseName: "列表测试",
@@ -344,7 +345,7 @@ func TestEnterpriseService_List(t *testing.T) {
 		ctx := createEnterpriseTestContext(1)
 
 		status := constants.StatusEnabled
-		req := &model.EnterpriseListReq{
+		req := &dto.EnterpriseListReq{
 			Page:     1,
 			PageSize: 20,
 			Status:   &status,