feat(pitch-deck): business model redesign + umlauts fix + tab animations

Business Model slide completely rewritten:
- Left: 3 pricing tiers (Starter/Professional/Enterprise)
- Right: Unit Economics (ACV, Gross Margin, NRR, Payback)
- Bottom-up sizing: 1,200 customers × 8,400 ACV = 10M ARR
- Land & Expand arrow visualization

Umlauts: 75+ ae/oe/ue → ä/ö/ü replacements across 10 slide files

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

pitch-deck/components/slides/GTMSlide.tsx

@@ -32,7 +32,7 @@ export default function GTMSlide({ lang }: GTMSlideProps) {
       color: 'border-purple-500/30 bg-purple-500/5',
       textColor: 'text-purple-400',
       items: [
-        de ? 'Channel-Partnerschaften mit IT-Systemhaeusern' : 'Channel partnerships with IT system integrators',
+        de ? 'Channel-Partnerschaften mit IT-Systemhäusern' : 'Channel partnerships with IT system integrators',
         de ? 'IHK- und Handwerkskammer-Kooperationen' : 'Chamber of Commerce & Industry partnerships',
         de ? 'Content Marketing: Compliance-Webinare, Whitepaper' : 'Content marketing: Compliance webinars, whitepapers',
         de ? 'Zielkunden: 50-200 in regulierten Branchen' : 'Target: 50-200 customers in regulated industries',
@@ -43,9 +43,9 @@ export default function GTMSlide({ lang }: GTMSlideProps) {
       color: 'border-emerald-500/30 bg-emerald-500/5',
       textColor: 'text-emerald-400',
       items: [
-        de ? 'Cloud-Tier fuer groessere Unternehmen (50-500 MA)' : 'Cloud tier for larger companies (50-500 employees)',
-        de ? 'EU-Expansion: Oesterreich, Schweiz, Benelux, Nordics' : 'EU expansion: Austria, Switzerland, Benelux, Nordics',
-        de ? 'OEM/Whitelabel fuer Steuerberater und Wirtschaftspruefer' : 'OEM/whitelabel for tax advisors and auditors',
+        de ? 'Cloud-Tier für größere Unternehmen (50-500 MA)' : 'Cloud tier for larger companies (50-500 employees)',
+        de ? 'EU-Expansion: Österreich, Schweiz, Benelux, Nordics' : 'EU expansion: Austria, Switzerland, Benelux, Nordics',
+        de ? 'OEM/Whitelabel für Steuerberater und Wirtschaftsprüfer' : 'OEM/whitelabel for tax advisors and auditors',
         de ? 'Self-Service-Onboarding und PLG-Motion' : 'Self-service onboarding and PLG motion',
       ],
     },
@@ -53,7 +53,7 @@ export default function GTMSlide({ lang }: GTMSlideProps) {
 
   const channels = [
     { icon: Target, label: de ? 'Direktvertrieb' : 'Direct Sales', pct: '40%', desc: de ? 'Outbound + Inbound, 2 AEs ab 2027' : 'Outbound + Inbound, 2 AEs from 2027' },
-    { icon: Handshake, label: de ? 'Channel-Partner' : 'Channel Partners', pct: '30%', desc: de ? 'IT-Haendler, Systemhaeuser, MSPs' : 'IT resellers, system integrators, MSPs' },
+    { icon: Handshake, label: de ? 'Channel-Partner' : 'Channel Partners', pct: '30%', desc: de ? 'IT-Händler, Systemhäuser, MSPs' : 'IT resellers, system integrators, MSPs' },
     { icon: Megaphone, label: de ? 'Content & Events' : 'Content & Events', pct: '20%', desc: de ? 'Webinare, Messen (it-sa), SEO' : 'Webinars, trade shows (it-sa), SEO' },
     { icon: Users, label: de ? 'Empfehlungen' : 'Referrals', pct: '10%', desc: de ? 'Bestandskunden-Empfehlungsprogramm' : 'Customer referral program' },
   ]