fix(price): skip price check for kit/complex articles

Kit articles (multi-component or cantitate_roa≠1) have expected price
differences between GoMag (commercial) and ROA (component sum).
Skip comparison entirely, mark with kit=True flag for UI badge.

Fix kit detection to use float()!=1 (catches cantitate_roa<1 like 0.5).
Update 3 existing tests + add multi-component kit test.

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

api/app/services/validation_service.py

@@ -544,7 +544,7 @@ def sync_prices_from_order(orders, mapped_codmat_data: dict, direct_id_map: dict
 
     # Build set of kit/bax SKUs (>1 component, or single component with cantitate_roa > 1)
     kit_skus = {sku for sku, comps in mapped_codmat_data.items()
-                if len(comps) > 1 or (len(comps) == 1 and (comps[0].get("cantitate_roa") or 1) > 1)}
+                if len(comps) > 1 or (len(comps) == 1 and float(comps[0].get("cantitate_roa") or 1) != 1)}
 
     updated = []
     own_conn = conn is None
@@ -708,6 +708,12 @@ def get_prices_for_order(items: list[dict], app_settings: dict, conn=None) -> di
                 and float(codmat_details[0].get("cantitate_roa") or 1) != 1
             )
 
+            if is_kit:
+                # Kit/pachet: prețul GoMag e comercial, ROA e suma componente din lista
+                # de prețuri — diferența e gestionată de discount line
+                result_items[idx]["kit"] = True
+                continue
+
             pret_roa_total = 0.0
             all_resolved = True