feat(dashboard): receipt-style order detail with inline transport and discount rows

Replace totals bar + VAT subtotals table with transport/discount as table
rows (with CODMAT from settings, proper VAT rate) and a single Total footer.
Right-align qty/price/TVA columns, thousands separator (ro-RO), discount
shown as qty=-1 price=positive.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/app/routers/sync.py

@@ -416,6 +416,12 @@ async def order_detail(order_number: str):
         except (json.JSONDecodeError, TypeError):
             pass
 
+    # Add settings for receipt display
+    app_settings = await sqlite_service.get_app_settings()
+    order["transport_vat"] = app_settings.get("transport_vat") or "21"
+    order["transport_codmat"] = app_settings.get("transport_codmat") or ""
+    order["discount_codmat"] = app_settings.get("discount_codmat") or ""
+
     return detail