feat(pitch-deck): legal disclaimer slide + projection footer on financial slides

New DisclaimerSlide (last slide):
- Full liability disclaimer (German/English)
- Confidentiality clause (purpose limitation, 3yr duration, Konstanz jurisdiction)
- Status as private individual in founding preparation

ProjectionFooter component on 4 financial slides:
- FinancialsSlide, TheAskSlide, FinanzplanSlide, CapTableSlide
- "Alle Finanzdaten sind Planzahlen" disclaimer

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

pitch-deck/components/ui/ProjectionFooter.tsx

@@ -0,0 +1,20 @@
+'use client'
+
+import { Language } from '@/lib/types'
+
+interface ProjectionFooterProps {
+  lang: Language
+}
+
+export default function ProjectionFooter({ lang }: ProjectionFooterProps) {
+  const de = lang === 'de'
+  return (
+    <div className="mt-3 pt-2 border-t border-white/5">
+      <p className="text-[9px] text-white/20 text-center italic">
+        {de
+          ? 'Alle Finanzdaten sind Planzahlen und stellen keine Garantie für künftige Ergebnisse dar (Stand: Q2 2026)'
+          : 'All financial data are projections and do not constitute a guarantee of future results (as of: Q2 2026)'}
+      </p>
+    </div>
+  )
+}