feat(F-084): completed feature

project/apps/admin/src/app/(dashboard)/categories/page.tsx

@@ -17,7 +17,11 @@ function CategoryRow({ cat, onEdit, onDelete }: { cat: Category; onEdit: (c: Cat
     <tr className="hover:bg-gray-50 transition-colors">
       <td className="px-4 py-3">
         <div className="flex items-center gap-2">
-          {cat.children && cat.children.length > 0 && <span className="text-gray-300">{cat.emoji ?? '📁'}</span>}
+          {cat.emoji ? (
+            <span className="text-xl">{cat.emoji}</span>
+          ) : (
+            <span className="text-gray-300 text-xl select-none" aria-hidden="true">·</span>
+          )}
           <div>
             <p className="text-sm font-medium text-gray-900">{cat.name}</p>
             <p className="text-xs text-gray-400">/{cat.slug}</p>