fix: prevent multiple refreshes on long scroll gestures

Add isRefreshingRef to block rapid-fire wheel events during refresh.
This prevents a long continuous scroll from triggering multiple
consecutive refreshes.
Co-authored-by: Anthony <AnthonyRonning@users.noreply.github.com>

Author: github-actions[bot]

frontend/src/components/ChatHistoryList.tsx

@@ -90,6 +90,7 @@ export function ChatHistoryList({
 constisPulling=useRef(false);
 constpullDistanceRef=useRef(0);
 constwheelDeltaAccumulator=useRef(0);
+constisRefreshingRef=useRef(false);
 
 // Fetch initial conversations from API using the OpenSecret SDK
 const{ isPending, error }=useQuery({
@@ -184,6 +185,8 @@ export function ChatHistoryList({
 
 // Pull-to-refresh handler
 consthandleRefresh=useCallback(async()=>{
+// Set ref immediately to block rapid-fire events
+isRefreshingRef.current=true;
 setIsPullRefreshing(true);
 try{
 awaitpollForUpdates();
@@ -194,6 +197,7 @@ export function ChatHistoryList({
 setTimeout(()=>{
 setIsPullRefreshing(false);
 setPullDistance(0);
+isRefreshingRef.current=false;
 },300);
 }
 },[pollForUpdates]);
@@ -291,7 +295,7 @@ export function ChatHistoryList({
 constWHEEL_THRESHOLD=-50;// Require accumulated scroll before triggering
 
 consthandleWheel=(e: WheelEvent)=>{
-if(!isDesktopPlatform||isPullRefreshing)return;
+if(!isDesktopPlatform||isRefreshingRef.current)return;
 
 // Only handle if the event target is within our container
 if(!container.contains(e.targetasNode))return;
@@ -352,7 +356,7 @@ export function ChatHistoryList({
 window.removeEventListener("mouseup",handleMouseUp);
 }
 };
-},[containerRef,isPullRefreshing,handleRefresh]);
+},[containerRef,handleRefresh]);
 
 // Set up polling every 60 seconds
 useEffect(()=>{