feat: enhance components and layouts

- fix: prevent code components from growing width during animation
- feat: enforce 100% width on browser frames (CodeWindow)
- feat: remove "Zurück" links project-wide from PageHeader
- feat: enable imgproxy face detection support for about page avatar

apps/web/app/case-studies/page.tsx

@@ -22,7 +22,6 @@ export default function CaseStudiesPage() {
           </>
         }
         description="Ergebnisse statt Versprechen. Was ich gebaut habe und was es bewirkt."
-        backLink={{ href: "/", label: "Zurück" }}
         backgroundSymbol="C"
       />