refactor: extract variables for first and last initial (laravel#30)

Author: matthiasweiss

resources/js/hooks/use-initials.tsx

@@ -5,7 +5,10 @@ export function useInitials() {
         if (names.length === 0) return '';
         if (names.length === 1) return names[0].charAt(0).toUpperCase();
 
-        return `${names[0].charAt(0)}${names[names.length - 1].charAt(0)}`.toUpperCase();
+        const firstInitial = names[0].charAt(0);
+        const lastInitial = names[names.length - 1].charAt(0);
+
+        return `${firstInitial}${lastInitial}`.toUpperCase();
     };
 
     return getInitials;