feat(pickup): 新增管理员线下提号功能

- 新建 admin_pickups 表独立于 rental_orders，不污染订单状态机与财务统计口径
- 提号中/已完成/已取消三态：创建锁定账号，完成时给卖家钱包加可用余额并下架 listing，取消解锁账号
- 完成时 listing 置 completed，复用现有 listingLockedForOwnerMutation 拦截再上架
- 管理端提号管理页（列表/创建/完成/取消/可提号账号搜索）+ 卖家端提号记录页
- 财务仪表盘新增线下提号独立统计块，与正常订单口径分离
- 钱包流水 label、状态标签、菜单入口同步补齐
- 优化卖家服务悬浮菜单为一行四个，尺寸与配色对齐买家服务

backend/internal/modules/adminfinance/dashboard.go

@@ -15,10 +15,40 @@ func (r *Repository) Dashboard(ctx context.Context, query DashboardQuery) (*Dash
 	if err != nil {
 		return nil, err
 	}
+	pickup, err := r.pickupSummary(ctx, query)
+	if err != nil {
+		return nil, err
+	}
 	return &DashboardDTO{
-		Summary:     *summary,
-		DailyItems:  dailyItems,
-		GeneratedAt: timeutil.ShanghaiNow(),
+		Summary:       *summary,
+		DailyItems:    dailyItems,
+		PickupSummary: *pickup,
+		GeneratedAt:   timeutil.ShanghaiNow(),
+	}, nil
+}
+
+// pickupSummary 线下提号统计，独立查询 admin_pickups 表，不混入正常订单口径。
+func (r *Repository) pickupSummary(ctx context.Context, query DashboardQuery) (*PickupSummaryDTO, error) {
+	db := r.db.WithContext(ctx)
+	var row struct {
+		SettledAmountCent int64
+		CompletedCount    int64
+	}
+	if err := db.Table("admin_pickups").
+		Select(`COALESCE(SUM(settle_amount_cent), 0) AS settled_amount_cent, COUNT(id) AS completed_count`).
+		Where("status = ?", "completed").
+		Where("completed_at >= ? AND completed_at <= ?", query.StartDate, query.EndDate).
+		Scan(&row).Error; err != nil {
+		return nil, err
+	}
+	var inProgress int64
+	if err := db.Table("admin_pickups").Where("status = ?", "picking_up").Count(&inProgress).Error; err != nil {
+		return nil, err
+	}
+	return &PickupSummaryDTO{
+		SettledAmountCent: row.SettledAmountCent,
+		CompletedCount:    row.CompletedCount,
+		InProgressCount:   inProgress,
 	}, nil
 }