feat: implement shipping line bookings management

- Add ShippingLineBookingsPage for listing and managing shipping line bookings.
- Create ShippingLineDocumentsModal for document uploads related to bookings.
- Introduce ShippingLineInitiateModal for initiating new shipping line bookings.
- Implement booking document state management with booking-doc-state utility.
- Add shipping line bookings service for API interactions.
- Update index to export new components and services.
- Enhance types for freight to include shipping line credits.

apps/edr-freight-api/src/modules/rule-engine/entities/rate.entity.ts

@@ -1,5 +1,6 @@
 import { BaseEntity } from '@edr/api-common';
 import { Column, Entity, Index, JoinColumn, ManyToOne } from 'typeorm';
+import { ShippingLineCompany } from '../../shipping-lines/entities/shipping-line-company.entity';
 import { CargoType } from './cargo-type.entity';
 import { ContainerType } from './container-type.entity';
 import { Yard } from './yard.entity';
@@ -108,6 +109,7 @@ export type RateTrigger = typeof RATE_TRIGGERS[number];
 @Index(['trigger'])
 @Index(['originYardId'])
 @Index(['destinationYardId'])
+@Index(['shippingLineCompanyId'])
 export class Rate extends BaseEntity {
   @Column({ name: 'rate_type', type: 'varchar', length: 50 })
   rateType!: RateType;
@@ -155,6 +157,23 @@ export class Rate extends BaseEntity {
   @JoinColumn({ name: 'destination_yard_id' })
   destinationYard?: Yard | null;
 
+  /**
+   * The shipping line this rate belongs to, or NULL for the standard rate every
+   * customer pays. A booking owned by a shipping line prices exclusively off
+   * that line's rates — the standard rate is NOT a fallback, so a missing line
+   * rate hard-blocks the booking rather than quietly billing the customer price.
+   *
+   * Points at `shipping_line_companies` (the portal account that books capacity),
+   * not `shipping_lines` (carrier reference data behind the SHIPPING_LINE
+   * trigger). The two are unrelated despite the similar names.
+   */
+  @Column({ name: 'shipping_line_company_id', type: 'uuid', nullable: true })
+  shippingLineCompanyId?: string | null;
+
+  @ManyToOne(() => ShippingLineCompany, { nullable: true, eager: false })
+  @JoinColumn({ name: 'shipping_line_company_id' })
+  shippingLineCompany?: ShippingLineCompany | null;
+
   @Column({ name: 'currency', type: 'varchar', length: 5 })
   currency!: string;