feat: enforce role section permissions and add a leads permission

Unticking a section hides it from the menu, closes its routes and blocks its writes on the server; existing roles keep their current access via migration.

apps/api/src/products/products.controller.ts

@@ -17,6 +17,7 @@ import { FileInterceptor } from '@nestjs/platform-express';
 import { memoryStorage } from 'multer';
 import type { Response } from 'express';
 import { JwtAuthGuard } from '../auth/jwt-auth.guard';
+import { RequirePermission, SectionPermissionGuard } from '../auth/section-permission.guard';
 import { CurrentUser } from '../auth/current-user.decorator';
 import { Roles } from '../auth/roles.decorator';
 import { RolesGuard } from '../auth/roles.guard';
@@ -27,7 +28,8 @@ import { ProductsExcelService } from './products-excel.service';
 import { brand } from '@mento/shared';
 
 @Controller('products')
-@UseGuards(JwtAuthGuard, RolesGuard)
+@UseGuards(JwtAuthGuard, RolesGuard, SectionPermissionGuard)
+@RequirePermission('products')
 export class ProductsController {
   constructor(
     private readonly productsService: ProductsService,