feat(pitch-deck): add Data Room link for investors in top-right corner

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

pitch-deck/components/PitchDeck.tsx

@@ -10,6 +10,8 @@ import { useAuditTracker } from '@/lib/hooks/useAuditTracker'
 import { Language, PitchData } from '@/lib/types'
 import { Investor } from '@/lib/hooks/useAuth'
 
+import Link from 'next/link'
+import { FolderOpen } from 'lucide-react'
 import ParticleBackground from './ParticleBackground'
 import ProgressBar from './ProgressBar'
 import NavigationControls from './NavigationControls'
@@ -237,6 +239,17 @@ export default function PitchDeck({ lang, onToggleLanguage, investor, onLogout,
       {/* Investor watermark */}
       {investor && <Watermark text={investor.email} />}
 
+      {/* Data Room link — only for real investor sessions, not preview */}
+      {investor && !previewData && (
+        <Link
+          href="/dataroom"
+          className="fixed top-4 right-4 z-40 flex items-center gap-1.5 px-3 py-1.5 rounded-full bg-white/[0.06] border border-white/[0.08] text-white/50 hover:text-white/80 hover:bg-white/[0.1] backdrop-blur-sm transition-all text-xs"
+        >
+          <FolderOpen className="w-3.5 h-3.5" />
+          Data Room
+        </Link>
+      )}
+
       <SlideContainer slideKey={nav.currentSlide} direction={nav.direction}>
         {renderSlide()}
       </SlideContainer>