feat: implement minimalist corporate design (Horizontal Bohrung & Graben-Trace)

Former-commit-id: 7f7c3d20bd6c746ef19140c532a64c518a31802b

app/[locale]/layout.tsx

@@ -17,6 +17,7 @@ import { cookies } from 'next/headers';
 import { TransitionProvider } from '@/components/providers/TransitionProvider';
 import { PageTransitionShutter } from '@/components/providers/PageTransitionShutter';
 import { InitialLoader } from '@/components/providers/InitialLoader';
+import { TrenchLines } from '@/components/ui/decorations/TrenchLines';
 
 const inter = Inter({
   subsets: ['latin'],
@@ -179,6 +180,7 @@ export default async function Layout(props: {
           <TransitionProvider>
             <InitialLoader shouldShowLoader={!hasSeenLoader} />
             <PageTransitionShutter />
+            <TrenchLines />
             <SkipLink />
             <Header navLinks={navLinks} />