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/PitchDeck.tsx

@@ -151,7 +151,7 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
           />
         )
       case 'executive-summary':
-        return <ExecutiveSummarySlide lang={lang} data={data} />
+        return <ExecutiveSummarySlide lang={lang} data={data} investorId={investor?.id || null} />
       case 'cover':
         return <CoverSlide lang={lang} onNext={nav.nextSlide} funding={data.funding} />
       case 'problem':