feat(last-mile): wire multi-container assignment, bulk drawdown + EDR exit papers

Frontend for the per-truck EDR backend:

- Assign modal takes a container LOAD per truck (MultiSelect, max 2) instead of a
  single container, so a truck can carry one 40ft or two 20ft. Sends
  containerNumbers[]; the API enforces the size rule.
- requiredVehicles is now size-aware: a 40ft fills a truck (1 each), two 20ft
  share one. It previously assumed ceil(containers / 2) regardless of size, so a
  2x40ft booking under-counted the trucks needed.
- Bulk bookings show the drawdown in the assign modal — remaining vs total
  tonnage, what's been hauled, and a "fully hauled" state when it reaches 0.
- New "Truck exit papers" row action opens a per-truck list (plate, containers,
  arrival, exit, net weight) with a per-truck exit-paper download.
- last-mile findAll/findById now load each assignment's containers so the UI can
  hydrate a truck's load.

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

apps/edr-freight-web/backoffice/src/services/last-mile.service.ts

@@ -67,8 +67,16 @@ export interface LastMileRecord {
   vehicleAssignments?: Array<{
     id: string;
     vehicleId: string;
+    /** @deprecated Legacy single container — `containers` is authoritative. */
     containerNumber?: string | null;
+    /** Containers riding this truck: one 40ft, or up to two 20ft. */
+    containers?: Array<{ id: string; containerNumber: string }>;
     distanceKm?: number | null;
+    /** Per-truck arrival / exit, stamped by the warehouse weighing steps. */
+    arrivedAt?: string | null;
+    departedAt?: string | null;
+    grossWeightTons?: number | null;
+    netWeightTons?: number | null;
     vehicle?: LastMileVehicle | null;
   }>;
   /** Present only when an invoice has actually been generated (not on distance). */
@@ -99,8 +107,13 @@ export const lastMileService = {
     api.delete<void>(LM.BY_ID(id)),
   setVehicles: (
     id: string,
-    vehicles: Array<{ vehicleId: string; containerNumber?: string | null }>,
+    vehicles: Array<{ vehicleId: string; containerNumbers?: string[] }>,
   ) => api.post<LastMileRecord>(`${LM.BASE}/${id}/vehicles`, { vehicles }),
+  /** Bulk drawdown: tonnage still to be hauled on this booking. */
+  remainingTons: (bookingId: string) =>
+    api.get<{ totalTons: number; hauledTons: number; remainingTons: number; complete: boolean }>(
+      `${LM.BASE}/booking/${bookingId}/remaining-tons`,
+    ),
   setDistances: (
     id: string,
     distances: Array<{ vehicleId: string; distanceKm: number }>,

apps/edr-freight-web/backoffice/src/services/warehouse.service.ts

@@ -323,6 +323,11 @@ export const warehouseService = {
     apiClient.get<Blob>(`/warehouse-inventory/customer-truck-exit-paper/${assignmentId}`, {
       responseType: 'blob',
     }),
+  /** Per-truck exit paper PDF for an EDR last-mile truck. */
+  downloadEdrTruckExitPaper: (assignmentId: string) =>
+    apiClient.get<Blob>(`/warehouse-inventory/edr-truck-exit-paper/${assignmentId}`, {
+      responseType: 'blob',
+    }),
   deliver: (id: string, payload: DeliverInventoryPayload) =>
     apiClient.post<WarehouseInventoryItem>(URL_CONSTANTS.WAREHOUSE_INVENTORY.DELIVER(id), payload),