修复提现拒绝审核参数校验

backend/internal/modules/withdrawal/admin.go

@@ -87,7 +87,8 @@ func (r *Repository) Review(ctx context.Context, adminID, id uint64, req ReviewW
 		}
 
 		now := time.Now()
-		if req.Approved {
+		approved := *req.Approved
+		if approved {
 			// 审核通过，进入处理中状态
 			withdrawal.Status = "processing"
 		} else {
@@ -103,7 +104,7 @@ func (r *Repository) Review(ctx context.Context, adminID, id uint64, req ReviewW
 		}
 
 		// 如果拒绝，解冻余额
-		if !req.Approved {
+		if !approved {
 			if err := wallet.AppendEntries(tx, wallet.Entry{
 				UserID:      withdrawal.UserID,
 				Direction:   "out",