fix(webapp): stabilize time-sensitive UI renders

apps/webapp/app/components/dashboard-agent/DashboardAgentHeader.tsx

@@ -49,6 +49,7 @@ export function DashboardAgentHeader({
   onClose: () => void;
 }) {
   const [isHistoryOpen, setHistoryOpen] = useState(false);
+  const [historyOpenedAt, setHistoryOpenedAt] = useState<number | null>(null);
   const [pendingDelete, setPendingDelete] = useState<DashboardAgentChat | null>(null);
 
   return (
@@ -57,7 +58,10 @@ export function DashboardAgentHeader({
         open={isHistoryOpen}
         onOpenChange={(open) => {
           setHistoryOpen(open);
-          if (open) onOpenHistory();
+          if (open) {
+            setHistoryOpenedAt(Date.now());
+            onOpenHistory();
+          }
         }}
       >
         <PopoverArrowTrigger
@@ -74,19 +78,22 @@ export function DashboardAgentHeader({
           className="w-72 max-w-(--radix-popover-content-available-width) p-0"
           align="start"
         >
-          <DashboardAgentHistoryMenu
-            chats={chats}
-            currentChatId={currentChatId}
-            thinkingChatId={thinkingChatId}
-            onSelect={(chatId) => {
-              setHistoryOpen(false);
-              onSelectChat(chatId);
-            }}
-            onRequestDelete={(chat) => {
-              setHistoryOpen(false);
-              setPendingDelete(chat);
-            }}
-          />
+          {historyOpenedAt === null ? null : (
+            <DashboardAgentHistoryMenu
+              chats={chats}
+              currentChatId={currentChatId}
+              thinkingChatId={thinkingChatId}
+              now={historyOpenedAt}
+              onSelect={(chatId) => {
+                setHistoryOpen(false);
+                onSelectChat(chatId);
+              }}
+              onRequestDelete={(chat) => {
+                setHistoryOpen(false);
+                setPendingDelete(chat);
+              }}
+            />
+          )}
         </PopoverContent>
       </Popover>
 

apps/webapp/app/components/dashboard-agent/DashboardAgentHistory.tsx

@@ -80,17 +80,17 @@ export function DashboardAgentHistoryMenu({
   chats,
   currentChatId,
   thinkingChatId,
+  now,
   onSelect,
   onRequestDelete,
 }: {
   chats: DashboardAgentChat[];
   currentChatId: string;
   thinkingChatId?: string | null;
+  now: number;
   onSelect: (chatId: string) => void;
   onRequestDelete: (chat: DashboardAgentChat) => void;
 }) {
-  const now = Date.now();
-
   return (
     <div className="max-h-80 overflow-y-auto p-1.5 scrollbar-thin scrollbar-track-transparent scrollbar-thumb-surface-control">
       {chats.length === 0 ? (

apps/webapp/app/routes/resources.orgs.$organizationSlug.projects.$projectParam.env.$envParam.waitpoints.$waitpointFriendlyId.complete/route.tsx

@@ -252,7 +252,9 @@ function CompleteDateTimeWaitpointForm({
   const project = useProject();
   const environment = useEnvironment();
 
-  const timeToComplete = waitpoint.completedAfter.getTime() - Date.now();
+  // oxlint-disable-next-line react/react-compiler -- This form intentionally snapshots wall-clock time for its deadline UI.
+  const now = Date.now();
+  const timeToComplete = waitpoint.completedAfter.getTime() - now;
   if (timeToComplete < 0) {
     return (
       <div className="flex items-center justify-center">
@@ -286,7 +288,7 @@ function CompleteDateTimeWaitpointForm({
           <div className="flex items-center gap-1">
             <AnimatedHourglassIcon
               className="text-dimmed-dimmed size-4"
-              delay={(waitpoint.completedAfter.getMilliseconds() - Date.now()) / 1000}
+              delay={(waitpoint.completedAfter.getMilliseconds() - now) / 1000}
             />
             <span className="mt-0.5 ">
               <LiveCountdown endTime={waitpoint.completedAfter} />