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/commission_withdrawal_setting_service_test.go

@@ -7,7 +7,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"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/commission_withdrawal_setting"
 	"github.com/break/junhong_cmp_fiber/internal/store/postgres"
 	"github.com/break/junhong_cmp_fiber/pkg/constants"
@@ -33,7 +33,7 @@ func TestCommissionWithdrawalSettingService_Create(t *testing.T) {
 	t.Run("新增提现配置", func(t *testing.T) {
 		ctx := createWithdrawalSettingTestContext(1)
 
-		req := &model.CreateWithdrawalSettingReq{
+		req := &dto.CreateWithdrawalSettingReq{
 			DailyWithdrawalLimit: 5,
 			MinWithdrawalAmount:  10000,
 			FeeRate:              100,
@@ -51,7 +51,7 @@ func TestCommissionWithdrawalSettingService_Create(t *testing.T) {
 	t.Run("未授权用户创建配置应失败", func(t *testing.T) {
 		ctx := context.Background()
 
-		req := &model.CreateWithdrawalSettingReq{
+		req := &dto.CreateWithdrawalSettingReq{
 			DailyWithdrawalLimit: 5,
 			MinWithdrawalAmount:  10000,
 			FeeRate:              100,
@@ -74,7 +74,7 @@ func TestCommissionWithdrawalSettingService_ConfigSwitch(t *testing.T) {
 	t.Run("配置切换-旧配置自动失效", func(t *testing.T) {
 		ctx := createWithdrawalSettingTestContext(1)
 
-		req1 := &model.CreateWithdrawalSettingReq{
+		req1 := &dto.CreateWithdrawalSettingReq{
 			DailyWithdrawalLimit: 3,
 			MinWithdrawalAmount:  5000,
 			FeeRate:              50,
@@ -83,7 +83,7 @@ func TestCommissionWithdrawalSettingService_ConfigSwitch(t *testing.T) {
 		require.NoError(t, err)
 		assert.True(t, result1.IsActive)
 
-		req2 := &model.CreateWithdrawalSettingReq{
+		req2 := &dto.CreateWithdrawalSettingReq{
 			DailyWithdrawalLimit: 10,
 			MinWithdrawalAmount:  20000,
 			FeeRate:              200,
@@ -114,7 +114,7 @@ func TestCommissionWithdrawalSettingService_List(t *testing.T) {
 	t.Run("查询配置列表-空结果", func(t *testing.T) {
 		ctx := createWithdrawalSettingTestContext(1)
 
-		req := &model.WithdrawalSettingListReq{
+		req := &dto.WithdrawalSettingListReq{
 			Page:     1,
 			PageSize: 20,
 		}
@@ -129,7 +129,7 @@ func TestCommissionWithdrawalSettingService_List(t *testing.T) {
 		ctx := createWithdrawalSettingTestContext(1)
 
 		for i := 0; i < 3; i++ {
-			req := &model.CreateWithdrawalSettingReq{
+			req := &dto.CreateWithdrawalSettingReq{
 				DailyWithdrawalLimit: i + 1,
 				MinWithdrawalAmount:  int64((i + 1) * 1000),
 				FeeRate:              int64((i + 1) * 10),
@@ -138,7 +138,7 @@ func TestCommissionWithdrawalSettingService_List(t *testing.T) {
 			require.NoError(t, err)
 		}
 
-		listReq := &model.WithdrawalSettingListReq{
+		listReq := &dto.WithdrawalSettingListReq{
 			Page:     1,
 			PageSize: 20,
 		}
@@ -170,7 +170,7 @@ func TestCommissionWithdrawalSettingService_GetCurrent(t *testing.T) {
 	t.Run("获取当前配置-有配置时正常返回", func(t *testing.T) {
 		ctx := createWithdrawalSettingTestContext(1)
 
-		req := &model.CreateWithdrawalSettingReq{
+		req := &dto.CreateWithdrawalSettingReq{
 			DailyWithdrawalLimit: 5,
 			MinWithdrawalAmount:  10000,
 			FeeRate:              100,