feat: moznost zmazat aj predvolene cenovky (uloha 10)

Stare predvolene sablony (badge-preset-*) ostali ulozene v localStorage
a nedali sa zmazat. Tlacidlo kosa je teraz pri kazdej sablone; pri
predvolenych sa preskoci mazanie v databaze, kde nie su.

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

src/components/editor/BadgeEditorModal.tsx

@@ -403,9 +403,12 @@ export const BadgeEditorModal: React.FC<BadgeEditorModalProps> = ({
 
   const deleteBadgeTemplate = async (badgeId: string) => {
     if (confirm('Naozaj chcete zmazať túto šablónu cenovky?')) {
+      // Predvolené šablóny existujú len v prehliadači (localStorage), v databáze nie sú
+      if (!badgeId.startsWith('badge-preset-')) {
         try {
           await supabase.from('badges').delete().eq('id', badgeId);
         } catch (e) {}
+      }
       const remaining = badges.filter((b) => b.id !== badgeId);
       setBadges(remaining);
       setActiveBadge(remaining[0] || null);
@@ -643,7 +646,7 @@ export const BadgeEditorModal: React.FC<BadgeEditorModalProps> = ({
                 >
                   <div className="flex items-center justify-between mb-1">
                     <p className="text-xs font-bold text-gray-800 truncate">{b.name}</p>
-                    {!b.id.startsWith('badge-preset-') && (
+                    {/* Zmazať sa dá každá šablóna, aj staršie predvolené (badge-preset-*) uložené v prehliadači */}
                     <button
                       onClick={(e) => {
                         e.stopPropagation();
@@ -654,7 +657,6 @@ export const BadgeEditorModal: React.FC<BadgeEditorModalProps> = ({
                     >
                       <Trash2 className="w-3.5 h-3.5" />
                     </button>
-                    )}
                   </div>
                   <div
                     className="w-full h-12 flex items-center justify-center transform scale-75 origin-center overflow-hidden pointer-events-none"