fix(pitch-deck): critical — isWandeldarlehen exact match, not includes

Bug: 1 Mio version instrument "Stammkapital + Wandeldarlehen + Equity"
matched includes('wandeldarlehen'), applying lean logic to 1 Mio version.

Fix: === 'wandeldarlehen' (exact match).

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

pitch-deck/components/PitchDeck.tsx

@@ -68,7 +68,7 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
   const error = previewData ? null : fetched.error
   const nav = useSlideNavigation()
   const [fabOpen, setFabOpen] = useState(false)
-  const isWandeldarlehen = (data?.funding?.instrument || '').toLowerCase().includes('wandeldarlehen')
+  const isWandeldarlehen = (data?.funding?.instrument || '').toLowerCase() === 'wandeldarlehen'
 
   // For version previews: use the version's default FM scenario instead of base table default
   // eslint-disable-next-line @typescript-eslint/no-explicit-any