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/my_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"
 )
 
@@ -16,31 +16,31 @@ func registerMyCommissionRoutes(router fiber.Router, handler *admin.MyCommission
 		Summary: "我的佣金概览",
 		Tags:    []string{"我的佣金"},
 		Input:   nil,
-		Output:  new(model.MyCommissionSummaryResp),
+		Output:  new(dto.MyCommissionSummaryResp),
 		Auth:    true,
 	})
 
 	Register(my, doc, groupPath, "POST", "/withdrawal-requests", handler.CreateWithdrawal, RouteSpec{
 		Summary: "发起提现申请",
 		Tags:    []string{"我的佣金"},
-		Input:   new(model.CreateMyWithdrawalReq),
-		Output:  new(model.CreateMyWithdrawalResp),
+		Input:   new(dto.CreateMyWithdrawalReq),
+		Output:  new(dto.CreateMyWithdrawalResp),
 		Auth:    true,
 	})
 
 	Register(my, doc, groupPath, "GET", "/withdrawal-requests", handler.ListWithdrawals, RouteSpec{
 		Summary: "我的提现记录",
 		Tags:    []string{"我的佣金"},
-		Input:   new(model.MyWithdrawalListReq),
-		Output:  new(model.WithdrawalRequestPageResult),
+		Input:   new(dto.MyWithdrawalListReq),
+		Output:  new(dto.WithdrawalRequestPageResult),
 		Auth:    true,
 	})
 
 	Register(my, doc, groupPath, "GET", "/commission-records", handler.ListRecords, RouteSpec{
 		Summary: "我的佣金明细",
 		Tags:    []string{"我的佣金"},
-		Input:   new(model.MyCommissionRecordListReq),
-		Output:  new(model.MyCommissionRecordPageResult),
+		Input:   new(dto.MyCommissionRecordListReq),
+		Output:  new(dto.MyCommissionRecordPageResult),
 		Auth:    true,
 	})
 }