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/sales/sales.controller.ts

@@ -10,6 +10,7 @@ import {
   UseGuards,
 } from '@nestjs/common';
 import { JwtAuthGuard } from '../auth/jwt-auth.guard';
+import { RequirePermission, SectionPermissionGuard } from '../auth/section-permission.guard';
 import { CurrentUser } from '../auth/current-user.decorator';
 import {
   CreateSalesGoalDto,
@@ -20,7 +21,8 @@ import {
 import { SalesService } from './sales.service';
 
 @Controller('sales')
-@UseGuards(JwtAuthGuard)
+@UseGuards(JwtAuthGuard, SectionPermissionGuard)
+@RequirePermission('sales')
 export class SalesController {
   constructor(private readonly salesService: SalesService) {}