fix(pitch): showcase sidebar shows only filtered slides + AI presenter via FAB

NavigationFAB and SlideOverview now accept slideNames prop and render only the
active slide list (filtered for showcase mode). Adds AI presenter start button
to the FAB footer so it's accessible even when intro-presenter slide is hidden.

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

pitch-deck/components/PitchDeck.tsx

@@ -9,6 +9,7 @@ import { usePitchData } from '@/lib/hooks/usePitchData'
 import { usePresenterMode } from '@/lib/hooks/usePresenterMode'
 import { useAuditTracker } from '@/lib/hooks/useAuditTracker'
 import { Language, PitchData } from '@/lib/types'
+import { t } from '@/lib/i18n'
 import { Investor } from '@/lib/hooks/useAuth'
 
 import Link from 'next/link'
@@ -85,6 +86,13 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
 
   const nav = useSlideNavigation(activeSlideOrder)
 
+  // Map active slide IDs → localized names for sidebar/overview
+  const i18n = t(lang)
+  const activeSlideNames = activeSlideOrder.map(id => {
+    const idx = SLIDE_ORDER.indexOf(id)
+    return idx >= 0 ? i18n.slideNames[idx] : id
+  })
+
   // Skip cap-table slide for Wandeldarlehen versions
   useEffect(() => {
     if (nav.currentSlide === 'cap-table' && isWandeldarlehen) {
@@ -284,6 +292,8 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
         onGoToSlide={nav.goToSlide}
         lang={lang}
         onToggleLanguage={onToggleLanguage}
+        slideNames={activeSlideNames}
+        onPresenterStart={isShowcase ? presenter.start : undefined}
       />
 
       {/* Presenter UI */}
@@ -309,6 +319,7 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
             onGoToSlide={nav.goToSlide}
             onClose={() => nav.setShowOverview(false)}
             lang={lang}
+            slideNames={activeSlideNames}
           />
         )}
       </AnimatePresence>