fix(pitch-deck): replace all hardcoded financial numbers with computed values

All financial data now flows from the same compute engine (useFinancialModel).
No more hardcoded numbers in any slide — all values are derived from the
finanzplan database, ensuring consistency across all pitch deck versions.

- FinanzplanSlide: KPI table + charts now use computeAnnualKPIs() from FMResult[]
- BusinessModelSlide: bottom-up calc (customers × ACV = ARR) from compute engine
- AssumptionsSlide: Base case from compute, Bear/Bull scaled from Base
- New helper: lib/finanzplan/annual-kpis.ts for 60-month → 5-year aggregation
- PitchDeck: passes investorId to all financial slides for version-aware data

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

pitch-deck/components/PitchDeck.tsx

@@ -169,7 +169,7 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
       case 'market':
         return <MarketSlide lang={lang} market={data.market} />
       case 'business-model':
-        return <BusinessModelSlide lang={lang} products={data.products} />
+        return <BusinessModelSlide lang={lang} products={data.products} investorId={investor?.id || null} />
       case 'traction':
         return <TractionSlide lang={lang} milestones={data.milestones} metrics={data.metrics} />
       case 'competition':
@@ -188,7 +188,7 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
       case 'ai-qa':
         return <AIQASlide lang={lang} />
       case 'annex-assumptions':
-        return <AssumptionsSlide lang={lang} />
+        return <AssumptionsSlide lang={lang} investorId={investor?.id || null} />
       case 'annex-architecture':
         return <ArchitectureSlide lang={lang} />
       case 'annex-gtm':
@@ -204,7 +204,7 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
       case 'annex-strategy':
         return <StrategySlide lang={lang} />
       case 'annex-finanzplan':
-        return <FinanzplanSlide lang={lang} />
+        return <FinanzplanSlide lang={lang} investorId={investor?.id || null} />
       case 'annex-glossary':
         return <GlossarySlide lang={lang} />
       case 'legal-disclaimer':