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/commission.go

@@ -4,7 +4,7 @@ import (
 	"github.com/gofiber/fiber/v2"
 
 	"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/pkg/openapi"
 )
 
@@ -15,24 +15,24 @@ func registerCommissionWithdrawalRoutes(router fiber.Router, handler *admin.Comm
 	Register(commission, doc, groupPath, "GET", "/withdrawal-requests", handler.ListWithdrawalRequests, RouteSpec{
 		Summary: "提现申请列表",
 		Tags:    []string{"佣金提现审批"},
-		Input:   new(model.WithdrawalRequestListReq),
-		Output:  new(model.WithdrawalRequestPageResult),
+		Input:   new(dto.WithdrawalRequestListReq),
+		Output:  new(dto.WithdrawalRequestPageResult),
 		Auth:    true,
 	})
 
 	Register(commission, doc, groupPath, "POST", "/withdrawal-requests/:id/approve", handler.ApproveWithdrawal, RouteSpec{
 		Summary: "审批通过提现申请",
 		Tags:    []string{"佣金提现审批"},
-		Input:   new(model.ApproveWithdrawalReq),
-		Output:  new(model.WithdrawalApprovalResp),
+		Input:   new(dto.ApproveWithdrawalReq),
+		Output:  new(dto.WithdrawalApprovalResp),
 		Auth:    true,
 	})
 
 	Register(commission, doc, groupPath, "POST", "/withdrawal-requests/:id/reject", handler.RejectWithdrawal, RouteSpec{
 		Summary: "拒绝提现申请",
 		Tags:    []string{"佣金提现审批"},
-		Input:   new(model.RejectWithdrawalReq),
-		Output:  new(model.WithdrawalApprovalResp),
+		Input:   new(dto.RejectWithdrawalReq),
+		Output:  new(dto.WithdrawalApprovalResp),
 		Auth:    true,
 	})
 }
@@ -45,16 +45,16 @@ func registerCommissionWithdrawalSettingRoutes(router fiber.Router, handler *adm
 	Register(commission, doc, groupPath, "POST", "/withdrawal-settings", handler.Create, RouteSpec{
 		Summary: "新增提现配置",
 		Tags:    []string{"提现配置管理"},
-		Input:   new(model.CreateWithdrawalSettingReq),
-		Output:  new(model.WithdrawalSettingItem),
+		Input:   new(dto.CreateWithdrawalSettingReq),
+		Output:  new(dto.WithdrawalSettingItem),
 		Auth:    true,
 	})
 
 	Register(commission, doc, groupPath, "GET", "/withdrawal-settings", handler.List, RouteSpec{
 		Summary: "提现配置列表",
 		Tags:    []string{"提现配置管理"},
-		Input:   new(model.WithdrawalSettingListReq),
-		Output:  new(model.WithdrawalSettingPageResult),
+		Input:   new(dto.WithdrawalSettingListReq),
+		Output:  new(dto.WithdrawalSettingPageResult),
 		Auth:    true,
 	})
 
@@ -62,7 +62,7 @@ func registerCommissionWithdrawalSettingRoutes(router fiber.Router, handler *adm
 		Summary: "获取当前生效的提现配置",
 		Tags:    []string{"提现配置管理"},
 		Input:   nil,
-		Output:  new(model.WithdrawalSettingItem),
+		Output:  new(dto.WithdrawalSettingItem),
 		Auth:    true,
 	})
 }