fix: cleanup book reviews HTML and improve about layout

Stripped HTML tags from book reviews, added a grid layout for About section on desktop, and fixed hobby icon mapping.

app/api/book-reviews/route.ts

@@ -25,6 +25,10 @@ export async function GET(request: NextRequest) {
     const locale = searchParams.get('locale') || 'en';
 
     const reviews = await getBookReviews(locale);
+    
+    if (process.env.NODE_ENV === 'development') {
+      console.log(`[API] Book Reviews geladen für ${locale}:`, reviews?.length || 0);
+    }
 
     if (reviews && reviews.length > 0) {
       return NextResponse.json({