Fix hero slider TypeScript so Next build can see linkUrl.

Fallback slides were inferred without linkUrl, so production next build failed on those property accesses.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/components/hero-slider.tsx

@@ -15,7 +15,7 @@ export type HeroSlide = {
 };
 
 export function HeroSlider({ slides }: { slides?: HeroSlide[] }) {
-  const items = slides?.length ? slides : fallbackSlides;
+  const items: HeroSlide[] = slides?.length ? slides : fallbackSlides;
   const [activeIndex, setActiveIndex] = useState(0);
   const [isPaused, setIsPaused] = useState(false);
   const activeSlide = items[activeIndex] ?? items[0];