feat(tenders): add Tender Management module (SRS, backend, frontend)

- SRS document: docs/SRS_TENDER_MANAGEMENT.md
- Prisma: Tender, TenderDirective models; Deal.sourceTenderId; Attachment.tenderId/tenderDirectiveId
- Backend: tenders module (CRUD, duplicate check, directives, notifications, file upload, convert-to-deal)
- Frontend: tenders list, detail, create/edit forms, directives, convert to deal, i18n (en/ar), dashboard card
- Seed: tenders permissions for admin and sales positions
- Auth: admin.service findFirst for email check (Prisma compatibility)

Made-with: Cursor

backend/src/routes/index.ts

@@ -8,6 +8,7 @@ import hrRoutes from '../modules/hr/hr.routes';
 import inventoryRoutes from '../modules/inventory/inventory.routes';
 import projectsRoutes from '../modules/projects/projects.routes';
 import marketingRoutes from '../modules/marketing/marketing.routes';
+import tendersRoutes from '../modules/tenders/tenders.routes';
 
 const router = Router();
 
@@ -21,6 +22,7 @@ router.use('/hr', hrRoutes);
 router.use('/inventory', inventoryRoutes);
 router.use('/projects', projectsRoutes);
 router.use('/marketing', marketingRoutes);
+router.use('/tenders', tendersRoutes);
 
 // API info
 router.get('/', (req, res) => {
@@ -36,6 +38,7 @@ router.get('/', (req, res) => {
       'Inventory & Assets',
       'Tasks & Projects',
       'Marketing',
+      'Tender Management',
     ],
   });
 });