fix(pitch-deck): version-aware financial model + layout fix + COMPLAI spelling

Critical fix: All financial slides now use the version's preferred scenario
instead of always defaulting to Base Case (1M). This ensures the
Wandeldarlehen version shows its own lean financial plan.

- useFinancialModel: add preferredScenarioId parameter
- PitchDeck: extract default scenario from previewData.fm_scenarios
- Pass preferredScenarioId to all 5 financial slides
- FinancialsSlide layout: remove empty right column, full-width charts
- Remove ScenarioSwitcher + unused slider from FinancialsSlide
- Fix COMPLEI → COMPLAI in presenter script (only TTS pronunciation differs)

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

pitch-deck/components/slides/AssumptionsSlide.tsx

@@ -11,6 +11,7 @@ import { useFinancialModel } from '@/lib/hooks/useFinancialModel'
 interface AssumptionsSlideProps {
   lang: Language
   investorId?: string | null
+  preferredScenarioId?: string | null
 }
 
 function fmtArr(v: number, de: boolean): string {
@@ -35,12 +36,12 @@ function breakEvenYear(month: number | null): string {
   return String(year)
 }
 
-export default function AssumptionsSlide({ lang, investorId }: AssumptionsSlideProps) {
+export default function AssumptionsSlide({ lang, investorId, preferredScenarioId }: AssumptionsSlideProps) {
   const i = t(lang)
   const de = lang === 'de'
 
   // Load computed financial data for Base Case
-  const fm = useFinancialModel(investorId || null)
+  const fm = useFinancialModel(investorId || null, preferredScenarioId)
   const summary = fm.activeResults?.summary
   const results = fm.activeResults?.results || []
   const lastResult = results.length > 0 ? results[results.length - 1] : null