feat(pricing): kit/pachet pricing with price list lookup, replace procent_pret

- Oracle PL/SQL: kit pricing logic with Mode A (distributed discount) and
  Mode B (separate discount line), dual policy support, PRETURI_CU_TVA flag
- Eliminate procent_pret from entire stack (Oracle, Python, JS, HTML)
- New settings: kit_pricing_mode, kit_discount_codmat, price_sync_enabled
- Settings UI: cards for Kit Pricing and Price Sync configuration
- Mappings UI: kit badges with lazy-loaded component prices from price list
- Price sync from orders: auto-update ROA prices when web prices differ
- Catalog price sync: new service to sync all GoMag product prices to ROA
- Kit component price validation: pre-check prices before import
- New endpoint GET /api/mappings/{sku}/prices for component price display
- New endpoints POST /api/price-sync/start, GET status, GET history
- DDL script 07_drop_procent_pret.sql (run after deploy confirmation)

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

api/database-scripts/04_pack_comenzi.pck

@@ -310,6 +310,9 @@ create or replace package body PACK_COMENZI is
   -- marius.mutu
   -- adauga_articol_comanda, modifica_articol_comanda + se poate completa ptva (21,11) in loc sa il ia din politica de preturi
   
+  -- 19.03.2026
+  -- adauga_articol_comanda permite de 2 ori acelasi articol cu cote tva diferite (ex: discount 11% si discount 21%)
+  
   ----------------------------------------------------------------------------------
   procedure adauga_masina(V_ID_MODEL_MASINA IN NUMBER,
                           V_NRINMAT         IN VARCHAR2,
@@ -781,6 +784,7 @@ create or replace package body PACK_COMENZI is
       FROM COMENZI_ELEMENTE
      WHERE ID_COMANDA = V_ID_COMANDA
        AND ID_ARTICOL = V_ID_ARTICOL
+       AND NVL(PTVA,0) = NVL(V_PTVA,0)
        AND STERS = 0;
   
     IF V_NR_INREG > 0 THEN