feat(#4): 抽奖中奖用户文案调整

- 免费时长: 用户消息改为「稍后您的 N 天免费时长将会自动添加至您的账户。
  如果超过24小时未添加成功，请联系人工客服处理。」(N=中奖天数动态)
  ledger.payload.message 仍保留descriptive内部文案供后台对账
- 人工发放(crypto/manual): 消息改为「请凭此截图直接联系人工客服兑换奖励。」

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/logic/lottery/draw/service.go

@@ -422,12 +422,12 @@ func (s *Service) dispatchOrEnqueueClaim(ctx context.Context, tx *gorm.DB, req R
 		return lottery.DispatchResult{State: lottery.DispatchStateAutoClaimed, Message: "谢谢参与"}, pendingClaimInfo{}, nil
 	}
 	if s.deps.Registry == nil {
-		return lottery.DispatchResult{State: lottery.DispatchStatePendingClaim, Message: "等待人工发放"}, pendingClaimInfo{}, nil
+		return lottery.DispatchResult{State: lottery.DispatchStatePendingClaim, Message: "请凭此截图直接联系人工客服兑换奖励。"}, pendingClaimInfo{}, nil
 	}
 	prizeHandler, err := s.deps.Registry.MustGet(prize.Type)
 	if err != nil {
 		if errors.Is(err, lottery.ErrHandlerNotRegistered) {
-			return lottery.DispatchResult{State: lottery.DispatchStatePendingClaim, Message: "等待人工发放"}, pendingClaimInfo{}, nil
+			return lottery.DispatchResult{State: lottery.DispatchStatePendingClaim, Message: "请凭此截图直接联系人工客服兑换奖励。"}, pendingClaimInfo{}, nil
 		}
 		return lottery.DispatchResult{}, pendingClaimInfo{}, wrapInternal(err)
 	}
@@ -472,7 +472,7 @@ func (s *Service) dispatchOrEnqueueClaim(ctx context.Context, tx *gorm.DB, req R
 	}
 	return lottery.DispatchResult{
 			State:   lottery.DispatchStatePendingClaim,
-			Message: "等待填写领奖信息",
+			Message: "请凭此截图直接联系人工客服兑换奖励。",
 		}, pendingClaimInfo{
 			ExpiresAt:       expiresAt,
 			ClaimFormSchema: schema,