fix: prevent infinite render loop in assistant telemetry

RequestTelemetry derived thread message metadata inside the useAuiState
selector with messages.map(), returning a new array on every render.
useSyncExternalStore treats the new reference as a changed snapshot,
causing an infinite re-render loop (React error #185) while an assistant
message streams. Select the stable messages reference and memoize the
metadata derivation instead.

apps/nextjs/src/components/assistant/assistant-panel.tsx

@@ -923,7 +923,8 @@ const RequestTelemetry = () => {
   const metadata = useAuiState((state) => state.message.metadata);
   const messageId = useAuiState((state) => state.message.id);
   const threadId = useAuiState((state) => state.threadListItem.remoteId);
-  const threadMessageMetadata = useAuiState((state) => state.thread.messages.map((message) => message.metadata));
+  const threadMessages = useAuiState((state) => state.thread.messages);
+  const threadMessageMetadata = useMemo(() => threadMessages.map((message) => message.metadata), [threadMessages]);
   const persistedTelemetry = getAssistantTelemetry(metadata);
   const persistedUsage = getAssistantUsage(metadata);
   const generationQuery = clientApi.assistant.getGenerationTelemetry.useQuery(