Merge pull request #782 from Tria-plc/freight_feature/usermanagement

add lashing surcharge for cargo types with hasLashing flag

packages/types/src/freight/index.ts

@@ -949,6 +949,23 @@ export interface AvailableDaysResponse {
   days: string[];
 }
 
+/**
+ * Advisory free-wagon count for a shipment day a customer is considering — a
+ * planning hint, never enforced (the batch engine and the export gate are the
+ * real authorities). `trainsForDay` is false when no departure carries the leg.
+ *
+ * - EXPORT: `fits` = a single open train that day can carry the WHOLE booking
+ *   (export never splits); `freeWagons` = the largest single-train leftover.
+ * - IMPORT/DOMESTIC: `freeWagons` = TOTAL room across the day's trains for the
+ *   booking's wagon type; `fits` = that total covers the booking. The batch may
+ *   still split the booking or defer a remainder to a later window.
+ */
+export interface DayAvailabilityResponse {
+  fits: boolean;
+  freeWagons: number;
+  trainsForDay: boolean;
+}
+
 export interface BookableScheduleLocomotive {
   id: string;
   code: string;