add per-container handling options for hazardous, reefer, and return services

- Introduced new boolean fields (isHazardous, isReefer, isReturn) in UnitDraft and related interfaces to allow individual container handling options.
- Updated emptyUnit function to initialize these new fields.
- Modified GlCreateBookingForm to handle and display these options for each container.
- Adjusted calculations for hazardous, reefer, and return quantities based on the new handling options.
- Updated the schema for container units and booking container lines to include handling options.
- Added migration to support the new return flag in the database.
- Enhanced various components to reflect gross weight calculations, ensuring consistency across the application.

apps/edr-freight-api/src/modules/rule-engine/rule-engine.service.ts

@@ -42,6 +42,14 @@ export interface BookingContainerEvalInput {
   isReefer?: boolean;
   isOverweight?: boolean;
   overweightExcessTons?: number | null;
+  /**
+   * How many individual containers on this line opted into each handling
+   * service. PER_CONTAINER surcharges bill these counts, not the line
+   * quantity — 20 containers with 10 hazardous bill hazard on 10.
+   */
+  hazardousQuantity?: number;
+  reeferQuantity?: number;
+  returnQuantity?: number;
 }
 
 export interface BookingEvaluationInput {
@@ -270,6 +278,27 @@ export class RuleEngineService {
         (sum, r) => sum + (r.overweightExcessTons ?? 0),
         0,
       );
+      /**
+       * Containers that opted into this trigger's handling service, summed
+       * across lines. null when the trigger isn't per-container handling (or
+       * no line carries a count) so the caller falls back to the full count.
+       */
+      const optedInCount = (trigger: string | null): number | null => {
+        const field =
+          trigger === 'HAZARDOUS'
+            ? 'hazardousQuantity'
+            : trigger === 'REEFER'
+              ? 'reeferQuantity'
+              : trigger === 'WITH_RETURN'
+                ? 'returnQuantity'
+                : null;
+        if (!field) return null;
+        const total = input.containers.reduce(
+          (sum, c) => sum + Number(c[field] ?? 0),
+          0,
+        );
+        return total > 0 ? total : null;
+      };
 
       let triggerValue: number | null = null;
       let calculatedAmount: number;
@@ -285,7 +314,11 @@ export class RuleEngineService {
           calculatedAmount = triggerValue * rateValue;
           break;
         case 'PER_CONTAINER':
-          triggerValue = containerCount;
+          // Handling surcharges bill only the containers that opted in, not the
+          // whole line — 20 containers with 10 hazardous bill hazard on 10.
+          // Legacy bookings carry no per-container counts (all 0) while their
+          // booking-level flag is set, so fall back to the full count there.
+          triggerValue = optedInCount(rate.trigger) ?? containerCount;
           calculatedAmount = triggerValue * rateValue;
           break;
         case 'PER_WAGON':