fix(webui): More fixes [copilot]

Author: PeterC89

packages/webui/src/client/lib/VirtualElement.tsx

@@ -234,16 +234,11 @@ export function VirtualElement({
 	)
 
 	const isScrolling = (): boolean => {
-		// Don't do updates while scrolling:
-		if (getViewPortScrollingState().isProgrammaticScrollInProgress) {
-			return true
-		}
-		// And wait if a programmatic scroll was done recently:
-		const timeSinceLastProgrammaticScroll = Date.now() - getViewPortScrollingState().lastProgrammaticScrollTime
-		if (timeSinceLastProgrammaticScroll < 100) {
-			return true
-		}
-		return false
+		const { isProgrammaticScrollInProgress, lastProgrammaticScrollTime } = getViewPortScrollingState()
+		if (!isProgrammaticScrollInProgress) return false
+
+		// Safety valve: stale programmatic scroll state should not block virtualization indefinitely.
+		return Date.now() - lastProgrammaticScrollTime < 1200
 	}
 
 	useEffect(() => {

packages/webui/src/client/lib/viewPort.ts

@@ -337,8 +337,30 @@ export async function scrollToPosition(scrollPosition: number, noAnimation?: boo
 			left: 0,
 			behavior: 'smooth',
 		})
-		await new Promise((resolve) => setTimeout(resolve, 300))
+
+		await new Promise<void>((resolve) => {
+			const startTime = Date.now()
+			let previousY = window.scrollY
+			let stableTicks = 0
+			const interval = window.setInterval(() => {
+				const currentY = window.scrollY
+				if (Math.abs(currentY - previousY) <= 1) {
+					stableTicks++
+				} else {
+					stableTicks = 0
+				}
+				previousY = currentY
+				viewPortScrollingState.lastProgrammaticScrollTime = Date.now()
+
+				if (stableTicks >= 2 || Date.now() - startTime > 1200) {
+					window.clearInterval(interval)
+					resolve()
+				}
+			}, 50)
+		})
+
 		viewPortScrollingState.isProgrammaticScrollInProgress = false
+		viewPortScrollingState.lastProgrammaticScrollTime = Date.now()
 	}
 }