- Landing: replaced custom landing-nav with standard top-header
- Removed scroll listener for nav (no longer needed)
- Header CSS moved to shared.css (single source)
- Removed duplicate header CSS from login, register, status
- All 4 public pages now have identical header with theme toggle
- Landing hero texts (headline, description, badge) from settings table
- Landing categories from /api/tools (dynamic from DB)
- Landing advantages from /api/content/advantages
- Dashboard about block from /api/content/dashboard
- Static HTML remains as fallback if API fails
- All editable via AdminJS admin panel
- Nav background visible immediately (semi-transparent dark with blur)
- Added Инструменты and Возможности links in nav (hidden on mobile)
- Added id=features to advantages section for smooth scroll
- Replaced 0₽ with Free label on dashboard about section
