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/presenter_test.go

@@ -7,6 +7,8 @@ import (
 	"time"
 
 	"hfb_sys/backend/internal/model"
+
+	"gorm.io/datatypes"
 )
 
 func TestOrderDTOForUserHidesDepositHoldFields(t *testing.T) {
@@ -72,6 +74,44 @@ func TestUserOrderListItemDoesNotSerializeDetailFields(t *testing.T) {
 	}
 }
 
+func TestUserOrderListItemIncludesRentalTerms(t *testing.T) {
+	row := orderRow{
+		RentalOrder: model.RentalOrder{
+			AccountSnapshot: datatypes.JSON([]byte(`{"haf_coin_amount":100000000,"asset_summary":{"daily_loss_m":10}}`)),
+		},
+		Title: "微信 三角洲巅峰 100M哈夫币",
+	}
+
+	item := row.toUserListItem(20, nil)
+	if item.RentalDays != 10 {
+		t.Fatalf("rental days = %d, want 10", item.RentalDays)
+	}
+	if item.DailyLossM != 10 {
+		t.Fatalf("daily loss = %v, want 10", item.DailyLossM)
+	}
+
+	raw, err := json.Marshal(item)
+	if err != nil {
+		t.Fatalf("Marshal() error = %v", err)
+	}
+	text := string(raw)
+	if !strings.Contains(text, `"rental_days":10`) || !strings.Contains(text, `"daily_loss_m":10`) {
+		t.Fatalf("list response missing rental terms: %s", text)
+	}
+}
+
+func TestUserOrderListItemOmitsRentalTermsWithoutSnapshot(t *testing.T) {
+	item := orderRow{Title: "测试账号"}.toUserListItem(20, nil)
+	raw, err := json.Marshal(item)
+	if err != nil {
+		t.Fatalf("Marshal() error = %v", err)
+	}
+	text := string(raw)
+	if strings.Contains(text, "rental_days") || strings.Contains(text, "daily_loss_m") {
+		t.Fatalf("empty snapshot should omit rental terms: %s", text)
+	}
+}
+
 func TestAdminOrderListItemShowsPhonesAndOmitsSnapshot(t *testing.T) {
 	row := orderRow{
 		RentalOrder: model.RentalOrder{ID: 1, OrderNo: "ORD-001", Status: orderStatusPendingPayment},