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/lib/hooks/useFinancialModel.ts

@@ -3,7 +3,7 @@
 import { useState, useEffect, useCallback, useRef } from 'react'
 import { FMScenario, FMResult, FMComputeResponse, InvestorSnapshot } from '../types'
 
-export function useFinancialModel(investorId?: string | null) {
+export function useFinancialModel(investorId?: string | null, preferredScenarioId?: string | null) {
   const [scenarios, setScenarios] = useState<FMScenario[]>([])
   const [activeScenarioId, setActiveScenarioId] = useState<string | null>(null)
   const [compareMode, setCompareMode] = useState(false)
@@ -51,7 +51,9 @@ export function useFinancialModel(investorId?: string | null) {
           }
 
           setScenarios(data)
-          const defaultScenario = data.find(s => s.is_default) || data[0]
+          // Use preferred scenario if available, otherwise default
+          const preferred = preferredScenarioId ? data.find(s => s.id === preferredScenarioId) : null
+          const defaultScenario = preferred || data.find(s => s.is_default) || data[0]
           if (defaultScenario) {
             setActiveScenarioId(defaultScenario.id)
           }