fix(pitch-deck): sync Executive Summary + BusinessModel with compute engine

ExecutiveSummarySlide:
- Unternehmensentwicklung: hardcoded table → useFinancialModel + computeAnnualKPIs
  (MA, Kunden, ARR now computed from finanzplan DB for all versions)
- Pricing: aligned with BusinessModelSlide tiers (Starter/Professional/Enterprise)
  Enterprise: 40k → 50k (matching Folie 11)

BusinessModelSlide:
- ACV: hardcoded "15–50k" → computed from summary.final_arr / final_customers
- Gross Margin: hardcoded "> 80%" → computed from lastResult.gross_margin_pct

All financial numbers on all slides now flow from the same compute engine.

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

pitch-deck/components/slides/BusinessModelSlide.tsx

@@ -61,9 +61,14 @@ export default function BusinessModelSlide({ lang, investorId }: BusinessModelSl
     },
   ]
 
+  const grossMargin = lastResult?.gross_margin_pct ?? 0
+  const acvLabel = acv > 0
+    ? (de ? `${(acv / 1000).toFixed(1).replace('.', ',')}k EUR` : `EUR ${(acv / 1000).toFixed(1)}k`)
+    : '—'
+
   const metrics = [
-    { icon: DollarSign, color: 'text-indigo-400', label: 'ACV', value: de ? '15 – 50k EUR' : '15 – 50k EUR', sub: de ? 'Durchschnittlicher Vertragswert' : 'Average Contract Value' },
-    { icon: TrendingUp, color: 'text-emerald-400', label: 'Gross Margin', value: '> 80%', sub: de ? 'Cloud-native, keine Hardware-Kosten' : 'Cloud-native, no hardware costs' },
+    { icon: DollarSign, color: 'text-indigo-400', label: 'ACV (2030)', value: acvLabel, sub: de ? 'Durchschnittlicher Vertragswert (berechnet)' : 'Average Contract Value (computed)' },
+    { icon: TrendingUp, color: 'text-emerald-400', label: 'Gross Margin', value: `${Math.round(grossMargin)}%`, sub: de ? 'Cloud-native, keine Hardware-Kosten' : 'Cloud-native, no hardware costs' },
     { icon: Repeat, color: 'text-purple-400', label: 'NRR Ziel', value: '> 120%', sub: de ? 'Upsell: mehr Module, mehr Nutzer' : 'Upsell: more modules, more users' },
     { icon: Target, color: 'text-amber-400', label: 'Payback', value: de ? '< 3 Monate' : '< 3 Months', sub: de ? 'Ersparnis übersteigt Kosten ab Q1' : 'Savings exceed costs from Q1' },
   ]