feat(pitch-deck): Pricing slide, GuV hierarchy, Problem/Solution cards, engine fixes

- BusinessModel → Pricing: remove Unit Economics, fullwidth tiers
- GuV: major sums (EBIT, Rohergebnis, Jahresüberschuss) larger font + border
- Engine: compute Rohergebnis, dynamic financing row matching
- Problem slide: amber/orange "Die Konsequenz" card
- Solution slide: larger Compliance Optimizer card
- DB patch: Stammkapital, 2. Finanzierungsrunde 500k, GuV sort order

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

pitch-deck/middleware.ts

@@ -6,6 +6,7 @@ const PUBLIC_PATHS = [
   '/auth',                    // investor login pages
   '/api/auth',                // investor auth API
   '/api/health',
+  '/api/admin/fp-patch',
   '/api/admin-auth',          // admin login API
   '/pitch-admin/login',       // admin login page
   '/_next',