feat(tahesab): net sales by factor, group, and commission

Report weight after returns for the selected period, with parent customer groups and separate silver and investment commission.

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

apps/api/src/customer-groups/customer-groups.controller.ts

@@ -38,6 +38,11 @@ class UpdateCustomerGroupDto {
   @IsOptional()
   @IsIn([...CUSTOMER_GROUP_COLORS])
   color?: CustomerGroupColor;
+
+  /** null گروه را اصلی می‌کند */
+  @IsOptional()
+  @IsString()
+  parentId?: string | null;
 }
 
 @Controller('customer-groups')