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/activities/activities.controller.ts

@@ -18,6 +18,7 @@ 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 { RolesGuard } from '../auth/roles.guard';
 import { Roles } from '../auth/roles.decorator';
 import { CurrentUser } from '../auth/current-user.decorator';
@@ -50,7 +51,8 @@ const excelUpload = FileInterceptor('file', {
 });
 
 @Controller('activities')
-@UseGuards(JwtAuthGuard)
+@UseGuards(JwtAuthGuard, SectionPermissionGuard)
+@RequirePermission('activities')
 export class ActivitiesController {
   constructor(
     private readonly activitiesService: ActivitiesService,