feat: 提现优化 — 取消状态 + 收款方式 + TableName 修复 (HIF-42)

- P04: 修复 Withdrawal.TableName() 返回正确表名 withdrawals
- P03: 新增提现状态常量 (constant/withdrawal.go)，消除魔法数字 0/1/2/3；
       新增 CommissionTypeWithdrawCancel (338) 和 WithdrawalCancelForbidden 错误码
- P02: 迁移 02123 为 withdrawals 表添加 method/account/qr_code_url 列；
       扩展 Withdrawal GORM 模型和 API 类型（CommissionWithdrawRequest、WithdrawalLog）；
       申请提现时增加收款方式校验逻辑
- P01: 新增用户取消提现接口 POST /v1/public/user/withdrawal_cancel；
       仅可取消自己的待审核提现，退还佣金并写佣金日志
- P05: 管理端提现列表新增 method 过滤参数

Co-authored-by: multica-agent <github@multica.ai>

apis/admin/user.api

@@ -235,6 +235,7 @@ type (
 		Size   int    `form:"size"`
 		UserId *int64 `form:"user_id,omitempty"`
 		Status *uint8 `form:"status,omitempty"`
+		Method *uint8 `form:"method,omitempty"`
 	}
 	GetWithdrawalListResponse {
 		List  []WithdrawalLog `json:"list"`

apis/public/user.api

@@ -109,13 +109,19 @@ type (
 		Rules []string `json:"rules" validate:"required"`
 	}
 	CommissionWithdrawRequest {
-		Amount  int64  `json:"amount"`
-		Content string `json:"content"`
+		Amount    int64  `json:"amount"`
+		Method    uint8  `json:"method"`
+		Account   string `json:"account"`
+		QrCodeUrl string `json:"qr_code_url"`
+		Content   string `json:"content"`
 	}
 	WithdrawalLog {
 		Id        int64  `json:"id"`
 		UserId    int64  `json:"user_id"`
 		Amount    int64  `json:"amount"`
+		Method    uint8  `json:"method"`
+		Account   string `json:"account"`
+		QrCodeUrl string `json:"qr_code_url"`
 		Content   string `json:"content"`
 		Status    uint8  `json:"status"`
 		Reason    string `json:"reason,omitempty"`
@@ -130,6 +136,9 @@ type (
 		List  []WithdrawalLog `json:"list"`
 		Total int64           `json:"total"`
 	}
+	CancelWithdrawalRequest {
+		WithdrawalId int64 `json:"withdrawal_id" validate:"required,gt=0"`
+	}
 	GetDeviceOnlineStatsResponse {
 		WeeklyStats       []WeeklyStat      `json:"weekly_stats"`
 		ConnectionRecords ConnectionRecords `json:"connection_records"`
@@ -356,6 +365,10 @@ service ppanel {
 	@handler QueryWithdrawalLog
 	get /withdrawal_log (QueryWithdrawalLogListRequest) returns (QueryWithdrawalLogListResponse)
 
+	@doc "Cancel withdrawal"
+	@handler CancelWithdrawal
+	post /withdrawal_cancel (CancelWithdrawalRequest)
+
 	@doc "Device Online Statistics"
 	@handler DeviceOnlineStatistics
 	get /device_online_statistics returns (GetDeviceOnlineStatsResponse)