fix padding on portal

apps/edr-freight-api/src/modules/vehicles/vehicles.service.ts

@@ -20,6 +20,25 @@ export class VehiclesService {
     private readonly history: FleetHistoryService,
   ) {}
 
+  /**
+   * A driver holds one truck at a time — reassignment requires detaching them
+   * from their current truck first.
+   * ponytail: app-level guard only (race window); add a partial unique index on
+   * assigned_driver_id if concurrent fleet edits ever become real.
+   */
+  private async assertDriverUnassigned(driverId: string, exceptVehicleId?: string): Promise<void> {
+    const holder = await this.vehicleRepo.findOne({
+      where: exceptVehicleId
+        ? { assignedDriverId: driverId, id: Not(exceptVehicleId) }
+        : { assignedDriverId: driverId },
+    });
+    if (holder) {
+      throw new ConflictException(
+        `This driver is already assigned to truck ${holder.plateNumber ?? holder.code ?? holder.id} — detach the driver from that truck first`,
+      );
+    }
+  }
+
   async create(dto: CreateVehicleDto): Promise<Vehicle> {
     const existing = await this.vehicleRepo.findOne({
       where: { plateNumber: dto.plateNumber },
@@ -31,6 +50,10 @@ export class VehiclesService {
       );
     }
 
+    if (dto.assignedDriverId) {
+      await this.assertDriverUnassigned(dto.assignedDriverId);
+    }
+
     const registrationNumber = `REG-${dto.vehicleType}-${Date.now()}`;
     const vehicle = this.vehicleRepo.create({
       ...dto,
@@ -121,6 +144,10 @@ export class VehiclesService {
       }
     }
 
+    if (dto.assignedDriverId && dto.assignedDriverId !== vehicle.assignedDriverId) {
+      await this.assertDriverUnassigned(dto.assignedDriverId, id);
+    }
+
     const prev = {
       assignedDriverId: vehicle.assignedDriverId,
       assignedDriverName: vehicle.assignedDriverName,