Final build fix: Explicitly type motion variants and strengthen null checks

app/[locale]/fleet/[slug]/page.tsx

@@ -3,9 +3,8 @@
 import { yachts } from "../../../data/yachts";
 import { notFound } from "next/navigation";
 import { Link } from "@/i18n/routing";
-import { motion } from "framer-motion";
+import { motion, Variants, AnimatePresence } from "framer-motion";
 import { use, useState, useCallback, useEffect } from "react";
-import { AnimatePresence } from "framer-motion";
 import { CldImage } from "next-cloudinary";
 import { useTranslations, useLocale } from "next-intl";
 
@@ -48,14 +47,15 @@ export default function YachtPage({ params }: PageProps) {
 
   if (!yacht) {
     notFound();
+    return null;
   }
 
-  const fadeInUp = {
+  const fadeInUp: Variants = {
     hidden: { opacity: 0, y: 40 },
     visible: { opacity: 1, y: 0, transition: { duration: 0.8, ease: "easeOut" } }
   };
 
-  const staggerContainer = {
+  const staggerContainer: Variants = {
     hidden: { opacity: 0 },
     visible: { opacity: 1, transition: { staggerChildren: 0.15 } }
   };