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>

data-entry-app/frontend/vite.config.js

@@ -6,12 +6,17 @@ export default defineConfig({
   plugins: [vue()],
   resolve: {
     alias: {
-      '@': fileURLToPath(new URL('./src', import.meta.url))
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+      '@shared': fileURLToPath(new URL('../../shared', import.meta.url))
     }
   },
   server: {
     port: 3010,
     proxy: {
+      '/api/auth': {
+        target: 'http://localhost:8001',
+        changeOrigin: true,
+      },
       '/api': {
         target: 'http://localhost:8003',
         changeOrigin: true,