feat(scanner): Trefferliste standardmaessig nach Fundzeit absteigend

Neueste Treffer stehen oben statt der hoechsten Match-Werte.

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

src/components/scanner/ScannerDashboard.tsx

@@ -151,7 +151,7 @@ export const ScannerDashboard: React.FC = () => {
   const [saveState, setSaveState] = useState<'idle' | 'pending' | 'saved' | 'error'>('idle');
   const saveTimer = useRef<number | null>(null);
 
-  const [sortKey, setSortKey] = useState<SortKey>('matchPercentage');
+  const [sortKey, setSortKey] = useState<SortKey>('createdAt');
   const [sortDirection, setSortDirection] = useState<'asc' | 'desc'>('desc');
 
   // Benachrichtigungen laufen ueber Refs, damit das Polling keine Render-Schleife