feat(pitch): showcase mode — per-investor toggle hides financial/investor slides for customer demos

Adds is_showcase boolean to pitch_investors; when set, filters out financials,
the ask, cap table, assumptions, finanzplan, risks, and intro-presenter slides.
Slide navigation is fully dynamic — progress bar and counts update accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pitch-deck/components/PitchDeck.tsx

@@ -2,7 +2,8 @@
 
 import { useCallback, useEffect, useState } from 'react'
 import { AnimatePresence } from 'framer-motion'
-import { useSlideNavigation } from '@/lib/hooks/useSlideNavigation'
+import { useSlideNavigation, SLIDE_ORDER } from '@/lib/hooks/useSlideNavigation'
+import { SHOWCASE_HIDDEN_SLIDES } from '@/lib/slide-order'
 import { useKeyboard } from '@/lib/hooks/useKeyboard'
 import { usePitchData } from '@/lib/hooks/usePitchData'
 import { usePresenterMode } from '@/lib/hooks/usePresenterMode'
@@ -68,15 +69,22 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
   const data = previewData || fetched.data
   const loading = previewData ? false : fetched.loading
   const error = previewData ? null : fetched.error
-  const nav = useSlideNavigation()
   const [fabOpen, setFabOpen] = useState(false)
   const isWandeldarlehen = (data?.funding?.instrument || '').toLowerCase() === 'wandeldarlehen'
+  const isShowcase = investor?.is_showcase === true
 
   // Derive fp_scenario IDs from version snapshot (fm_scenarios stores fp_scenario IDs directly)
   const fpScenarios = data?.fp_scenarios || []
   const fpBaseScenarioId = fpScenarios.find(s => s.is_default)?.id ?? fpScenarios[0]?.id ?? null
   const preferredScenarioId = fpBaseScenarioId
 
+  // Showcase mode: filter out investor/financial slides
+  const activeSlideOrder = isShowcase
+    ? SLIDE_ORDER.filter(s => !SHOWCASE_HIDDEN_SLIDES.has(s))
+    : SLIDE_ORDER
+
+  const nav = useSlideNavigation(activeSlideOrder)
+
   // Skip cap-table slide for Wandeldarlehen versions
   useEffect(() => {
     if (nav.currentSlide === 'cap-table' && isWandeldarlehen) {