Add salesperson commissions on issued invoices and a cheque register.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/users/dto.ts

@@ -1,8 +1,12 @@
+import { Type } from 'class-transformer';
 import {
   IsEmail,
   IsIn,
+  IsNumber,
   IsString,
+  Max,
   MaxLength,
+  Min,
   MinLength,
 } from 'class-validator';
 
@@ -31,3 +35,11 @@ export class UpdateUserRoleDto {
   @IsIn(ALL_ROLES)
   role!: (typeof ALL_ROLES)[number];
 }
+
+export class UpdateUserCommissionDto {
+  @Type(() => Number)
+  @IsNumber()
+  @Min(0)
+  @Max(100)
+  commissionPercent!: number;
+}