fix: odkaz Otvorit v Brevo vedie priamo na upravu kampane (uloha 17)

Namiesto napevno zadaneho zoznamu kampani (404) sa odkaz sklada z ID
kampane: app.brevo.com/marketing-campaign/edit/{id}.

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

src/components/editor/TopBar.tsx

@@ -16,6 +16,7 @@ import {
   Check
 } from 'lucide-react';
 import { NewsletterCampaign } from '@/types/newsletter';
+import { getBrevoCampaignUrl } from '@/lib/brevo';
 
 interface TopBarProps {
   campaign: NewsletterCampaign;
@@ -214,11 +215,11 @@ export const TopBar: React.FC<TopBarProps> = ({
           <div className="flex items-center gap-1.5 bg-emerald-50 border border-emerald-200 p-1 rounded-xl">
             {/* Odkaz na zoznam / úpravu v Brevo */}
             <a
-              href={brevoCampaignUrl || brevoListingUrl || 'https://app.brevo.com/campaigns/listing'}
+              href={getBrevoCampaignUrl(campaign.brevoCampaignId)}
               target="_blank"
               rel="noreferrer"
               className="flex items-center gap-1 text-xs font-bold text-white bg-emerald-600 hover:bg-emerald-700 px-3 py-1.2 rounded-lg transition-all shadow-xs"
-              title={`Kampaň #${campaign.brevoCampaignId} je v Brevo (${brevoCampaignStatus || 'draft'}). Kliknutím otvoríte zoznam kampaní v Brevo.`}
+              title={`Kampaň #${campaign.brevoCampaignId} je v Brevo (${brevoCampaignStatus || 'draft'}). Kliknutím ju otvoríte v Brevo.`}
             >
               <ExternalLink className="w-3.5 h-3.5" />
               <span>Otvoriť v Brevo</span>