- DataSovereignty: replace all ASCII encodings with proper German umlauts (oe→ö, ae→ä, ue→ü) throughout all text content
- Header: fix misleading nav label "Datenschutz" → "Datensouveränität" (links to data sovereignty section, not legal page)
- Hero: add "Crailsheim" to visible subheadline for local SEO signal
- Contact: add address/location entry for NAP consistency (Name, Address, Phone)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>