add lashing surcharge for cargo types with hasLashing flag

add lashing surcharge for cargo types with hasLashing flag

apps/edr-freight-api/src/contracts/contract-document-view-model.builder.ts

@@ -18,6 +18,7 @@ import {
   ContractDynamicTemplateView,
   ContractViewModel,
 } from './contract-view-model.builder';
+import { RateSchedule } from './contract-rate-schedule.builder';
 
 /**
  * Signature row for the contract PDF. Mirrors the booking builder's
@@ -135,6 +136,7 @@ export class ContractDocumentViewModelBuilder {
     }
 
     const pricing = this.buildPricing(contract);
+    const rateSchedule = this.buildRateSchedule(pricing);
     const signatures = await this.loadSignatures(contractId);
 
     const hasCustomer = signatures.some((s) => s.role === 'CUSTOMER');
@@ -177,6 +179,7 @@ export class ContractDocumentViewModelBuilder {
       },
       schedule: this.buildSchedule(contract),
       pricing: pricing as unknown as ContractViewModel['pricing'],
+      rateSchedule,
       // Cast: contract signers (CUSTOMER|STAFF|DIRECTOR|CEO) widen the booking
       // view-model's narrower CUSTOMER|STAFF role union.
       signatures: signatures as unknown as ContractViewModel['signatures'],
@@ -230,6 +233,40 @@ export class ContractDocumentViewModelBuilder {
     };
   }
 
+  /**
+   * A rate schedule for the contract PDF, sourced from the contract's own frozen
+   * unit rates (its agreed lane prices) rather than the global rate config — a
+   * signed contract must show the prices it was signed on. Rendered as freight
+   * lanes labelled with the contract's primary origin → destination route.
+   */
+  private buildRateSchedule(pricing: ContractUnitRateSchedule): RateSchedule {
+    const route = `${pricing.originLabel} → ${pricing.destinationLabel}`;
+    const freightLanes = pricing.unitRates.map((line) => ({
+      route,
+      cargo: line.label,
+      currency: line.currency,
+      amount: this.formatAmount(line.unitPrice),
+      unit: line.unit.startsWith('per ') ? line.unit : `per ${line.unit}`,
+    }));
+
+    return {
+      freightLanes,
+      additionalServices: [],
+      surcharges: [],
+      isEmpty: freightLanes.length === 0,
+      currencyLabel: pricing.currency,
+    };
+  }
+
+  private formatAmount(value: number | string): string {
+    const num = Number(value);
+    if (!Number.isFinite(num)) return String(value);
+    return num.toLocaleString('en-US', {
+      minimumFractionDigits: 0,
+      maximumFractionDigits: 2,
+    });
+  }
+
   private buildSchedule(contract: Contract): ContractViewModel['schedule'] {
     const firstRoute = this.firstRoute(contract);
     const cargoScope = (contract.cargoScope ?? [])[0];