feat(settings): add GoMag API config, Oracle dropdowns, compact 2x2 layout

- Remove ID_GESTIUNE from config (unused)
- Add GoMag API settings (key, shop, days_back, limit) to SQLite — editable without restart
- sync_service reads GoMag settings from SQLite before download
- gomag_client.download_orders accepts api_key/api_shop/limit overrides
- New GET /api/settings/sectii and /api/settings/politici endpoints for Oracle dropdowns
  (nom_sectii.sectie, crm_politici_preturi.nume_lista_preturi)
- id_pol, id_sectie, transport_id_pol, discount_id_pol now use select dropdowns
- order_reader extracts discount_vat from GoMag JSON discounts[].vat
- import_service uses GoMag discount_vat as primary, settings as fallback
- settings.html redesigned to compact 2x2 grid (GoMag API | Import ROA / Transport | Discount)
- settings.js v2: loadDropdowns() sequential before loadSettings()

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/app/services/sync_service.py

@@ -129,8 +129,18 @@ async def run_sync(id_pol: int = None, id_sectie: int = None, run_id: str = None
             # Phase 0: Download orders from GoMag API
             _update_progress("downloading", "Descărcare comenzi din GoMag API...")
             _log_line(run_id, "Descărcare comenzi din GoMag API...")
+            # Read GoMag settings from SQLite (override config defaults)
+            dl_settings = await sqlite_service.get_app_settings()
+            gomag_key = dl_settings.get("gomag_api_key") or None
+            gomag_shop = dl_settings.get("gomag_api_shop") or None
+            gomag_days_str = dl_settings.get("gomag_order_days_back")
+            gomag_days = int(gomag_days_str) if gomag_days_str else None
+            gomag_limit_str = dl_settings.get("gomag_limit")
+            gomag_limit = int(gomag_limit_str) if gomag_limit_str else None
             dl_result = await gomag_client.download_orders(
-                json_dir, log_fn=lambda msg: _log_line(run_id, msg)
+                json_dir, log_fn=lambda msg: _log_line(run_id, msg),
+                api_key=gomag_key, api_shop=gomag_shop,
+                days_back=gomag_days, limit=gomag_limit,
             )
             if dl_result["files"]:
                 _log_line(run_id, f"GoMag: {dl_result['total']} comenzi în {dl_result['pages']} pagini → {len(dl_result['files'])} fișiere")