fix: use @utility for animate-blink, call handleScroll on mount

components/reading-progress.tsx

@@ -13,6 +13,7 @@ export default function ReadingProgress() {
       }
     };
 
+    handleScroll();
     window.addEventListener("scroll", handleScroll, { passive: true });
     return () => window.removeEventListener("scroll", handleScroll);
   }, []);