feat: import ZIP s podkladmi aj do sekcie Vernostne zlavy (bez zmeny farby pozadia)

S kartou = Cena s vernostnou kartou (inak akciova cena), bez karty = akciova
(inak bezna) cena; jednotkova cena bez karty sa prepocita.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/page.tsx

@@ -358,7 +358,7 @@ export default function Home() {
   const handleImportProducts = (imported: ProductItem[], options?: { replace?: boolean }) => {
     if (!selectedModuleId) return;
     const target = campaign.modules.find((m) => m.id === selectedModuleId);
-    if (!target || target.type !== 'products_grid') {
+    if (!target || (target.type !== 'products_grid' && target.type !== 'loyalty_club')) {
       alert('Pre import prosím najskôr označte produktovú sekciu.');
       return;
     }
@@ -372,7 +372,10 @@ export default function Home() {
     const withLayout = imported.map((p) => {
       if (!first) return p;
       const inherited: Partial<ProductItem> = {};
-      for (const k of layoutKeys) if (p[k] === undefined && first[k] !== undefined) Object.assign(inherited, { [k]: first[k] });
+      for (const k of layoutKeys) {
+        if (k === 'cardBgColor' && target.type === 'loyalty_club') continue; // vernostné zľavy: farba pozadia ostáva
+        if (p[k] === undefined && first[k] !== undefined) Object.assign(inherited, { [k]: first[k] });
+      }
       return { ...inherited, ...p };
     });
 
@@ -1015,6 +1018,7 @@ export default function Home() {
         onClose={() => setIsImportOpen(false)}
         onImportProducts={handleImportProducts}
         availableBadges={availableBadges}
+        variant={campaign.modules.find((m) => m.id === selectedModuleId)?.type === 'loyalty_club' ? 'loyalty' : 'standard'}
       />
 
       {/* Modál Editora cenoviek (SVG -> PNG) */}