feat(warehouses): approve-delivery opens handover doc for review and signing

Customer reviews the generated handover before signing:
- add booking-scoped handover-document endpoint (portal only has bookingId)
- ApproveDeliveryModal renders the handover PDF, then applies the customer's
  saved signature on approve and returns the signed PDF
- ApproveDeliveryButton opens the modal instead of one-click silent signing

Handover generation + sign notification (in-app + SMS + email) and the
"Approve delivery" visibility on an awaiting-signature handover were committed
earlier; this wires the review-and-sign step.

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

apps/edr-freight-api/src/modules/warehouses/warehouse-inventory.controller.ts

@@ -361,6 +361,16 @@ export class WarehouseInventoryController {
     return this.handoverService.requestSignature(bookingId);
   }
 
+  @Get('bookings/:bookingId/handover-document')
+  @ApiOperation({ summary: 'View import goods handover document PDF (resolved by booking)' })
+  async bookingHandoverDocument(@Param('bookingId', ParseUUIDPipe) bookingId: string, @Res() res: Response) {
+    const { filename, buffer } = await this.inventoryService.handoverDocumentForBooking(bookingId);
+    res.setHeader('Content-Type', 'application/pdf');
+    res.setHeader('Content-Disposition', `inline; filename="${filename}"`);
+    res.setHeader('Content-Length', buffer.length);
+    return res.send(buffer);
+  }
+
   @Get('bookings/:bookingId/container-items')
   @ApiOperation({ summary: 'Per-container/bulk items of a booking with lifecycle stage + refs' })
   containerItems(@Param('bookingId', ParseUUIDPipe) bookingId: string) {

apps/edr-freight-api/src/modules/warehouses/warehouse-inventory.service.ts

@@ -3016,6 +3016,21 @@ export class WarehouseInventoryService {
     };
   }
 
+  /** Handover PDF resolved by booking (for the portal, which only has bookingId). */
+  async handoverDocumentForBooking(bookingId: string): Promise<{ filename: string; buffer: Buffer }> {
+    const [inv]: Array<{ id: string }> = await this.dataSource.query(
+      `SELECT id FROM freight.warehouse_inventory
+        WHERE booking_id = $1 AND deleted_at IS NULL
+        ORDER BY updated_at DESC NULLS LAST, created_at DESC
+        LIMIT 1`,
+      [bookingId],
+    );
+    if (!inv) {
+      throw new NotFoundException(`No warehouse inventory found for booking ${bookingId}`);
+    }
+    return this.handoverDocument(inv.id);
+  }
+
   async handoverDocument(id: string): Promise<{ filename: string; buffer: Buffer }> {
     const [row] = await this.dataSource.query(
       `SELECT inv.id,