feat: Add JWT auth and nomenclature sync to data-entry-app

Integrate shared JWT authentication into data-entry-app:
- Add Oracle pool initialization for auth service
- Add AuthenticationMiddleware to protect API routes
- Update all receipt endpoints to use CurrentUser from JWT
- Add shared auth router (/api/auth/login, /api/auth/refresh)

Add nomenclature synchronization feature:
- Create SQLite models for synced suppliers, local suppliers, and cash registers
- Add nomenclature router with sync triggers and CRUD endpoints
- Add sync service for Oracle → SQLite nomenclature data
- Update nomenclature_service to use synced SQLite data with fallbacks

Create shared frontend components:
- Add shared/frontend/ with LoginView.vue, auth store factory, login.css
- Integrate shared login and auth into data-entry-app frontend
- Add axios-based API service with token refresh interceptor

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/data-entry/ARCHITECTURE.md

@@ -33,8 +33,11 @@ Aplicatie separata pentru introducere date in ERP, cu workflow de aprobare si st
 - Scalare independenta
 
 **Shared Components**:
-- `shared/database/oracle_pool.py` - conexiune Oracle pentru nomenclatoare
-- `shared/auth/` - autentificare JWT comuna
+- `shared/database/oracle_pool.py` - conexiune Oracle pentru nomenclatoare si autentificare
+- `shared/auth/` - autentificare JWT comuna (middleware, routes factory, auth service)
+- `shared/frontend/components/LoginView.vue` - UI login partajat
+- `shared/frontend/stores/auth.js` - Pinia auth store factory
+- `shared/frontend/styles/login.css` - stiluri login
 
 ### 3. Workflow cu Staging Area