fix(home): counter counts exactly once, no restart on value refresh

AnimatedCounter restarted from 0 on every online-count cache refresh (~10s)
because the effect depended on value. Rewrote it as a single requestAnimationFrame
animation with ease-out; changes to value after the animation only update the
display statically.

src/components/animated-counter.tsx

@@ -12,25 +12,35 @@ export function AnimatedCounter({
 }) {
 	const ref = useRef<HTMLSpanElement>(null);
 	const isInView = useInView(ref, { once: true, margin: "-50px" });
+	const started = useRef(false);
 	const [display, setDisplay] = useState(0);
 
 	useEffect(() => {
 		if (!isInView) return;
+
+		if (started.current) {
+			setDisplay(value);
+			return;
+		}
+		started.current = true;
+
 		const duration = 1200;
-		const steps = 30;
-		const increment = value / steps;
-		let current = 0;
-		let step = 0;
-		const id = setInterval(() => {
-			step++;
-			current = Math.min(Math.round(increment * step), value);
-			setDisplay(current);
-			if (step >= steps) {
-				clearInterval(id);
+		const start = performance.now();
+		let raf = 0;
+
+		const tick = (now: number) => {
+			const progress = Math.min((now - start) / duration, 1);
+			const eased = 1 - (1 - progress) ** 3;
+			setDisplay(Math.round(eased * value));
+			if (progress < 1) {
+				raf = requestAnimationFrame(tick);
+			} else {
 				setDisplay(value);
 			}
-		}, duration / steps);
-		return () => clearInterval(id);
+		};
+
+		raf = requestAnimationFrame(tick);
+		return () => cancelAnimationFrame(raf);
 	}, [isInView, value]);
 
 	return (