feat(listings): 订单和账号详情展示可租时长与每日消耗

租客在订单列表和详情标题能看到每个号的租期、消耗。账号详情把这两项拆成独立格子。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/modules/order/dto.go

@@ -96,6 +96,8 @@ type UserOrderListItemDTO struct {
 	Title                   string     `json:"title"`
 	ServerRegion            string     `json:"server_region"`
 	LoginPlatform           string     `json:"login_platform"`
+	RentalDays              int        `json:"rental_days,omitempty"`
+	DailyLossM              float64    `json:"daily_loss_m,omitempty"`
 	DisplayAmountCent       int64      `json:"display_amount_cent"`
 	DepositAmountCent       int64      `json:"deposit_amount_cent"`
 	DepositWaivedAmountCent int64      `json:"deposit_waived_amount_cent"`