Restore key={threadId} on ChatView to prevent state leaking across threads

Author: cursoragent

apps/web/src/routes/_chat.$threadId.tsx

@@ -222,7 +222,7 @@ function ChatThreadRouteView() {
     return (
       <>
         <SidebarInset className="h-dvh  min-h-0 overflow-hidden overscroll-y-none bg-background text-foreground">
-          <ChatView threadId={threadId} />
+          <ChatView key={threadId} threadId={threadId} />
         </SidebarInset>
         <DiffPanelInlineSidebar
           diffOpen={diffOpen}
@@ -237,7 +237,7 @@ function ChatThreadRouteView() {
   return (
     <>
       <SidebarInset className="h-dvh min-h-0 overflow-hidden overscroll-y-none bg-background text-foreground">
-        <ChatView threadId={threadId} />
+        <ChatView key={threadId} threadId={threadId} />
       </SidebarInset>
       <DiffPanelSheet diffOpen={diffOpen} onCloseDiff={closeDiff}>
         {shouldRenderDiffContent ? <LazyDiffPanel mode="sheet" /> : null}