fix(app): remove input event listener from scrollbar hook that raced with RNW controlled input

The scrollbar hook's raw DOM `input` listener on the textarea called
setState before React Native Web's delegated handler could process the
same event, causing a re-render with the stale controlled value and
swallowing the edit. Scroll and ResizeObserver already cover all
scrollbar metric updates.

packages/app/src/components/use-web-scrollbar.tsx

@@ -77,7 +77,6 @@ export function useWebElementScrollbar(
     }
 
     element.addEventListener("scroll", update, { passive: true });
-    element.addEventListener("input", update, { passive: true });
 
     const resizeObserver = new ResizeObserver(update);
     resizeObserver.observe(element);
@@ -90,7 +89,6 @@ export function useWebElementScrollbar(
 
     return () => {
       element.removeEventListener("scroll", update);
-      element.removeEventListener("input", update);
       resizeObserver.disconnect();
       element.removeAttribute("data-hide-scrollbar");
       (element.style as any).scrollbarWidth = "";