feat: sync thread artifacts to panel state

surfsense_web/features/chat-artifacts/hooks/use-sync-chat-artifacts.ts

@@ -0,0 +1,22 @@
+import type { ThreadMessageLike } from "@assistant-ui/react";
+import { useSetAtom } from "jotai";
+import { useEffect, useMemo } from "react";
+import { collectArtifacts } from "../lib/collect-artifacts";
+import { chatArtifactsAtom } from "../state/artifacts-panel.atom";
+
+/**
+ * Keep `chatArtifactsAtom` in sync with the active thread's messages so the
+ * right-panel sidebar (rendered in the layout shell, outside the chat runtime)
+ * can read the deliverable list. Clears on unmount and on thread switch (a new
+ * `messages` array recomputes to the new thread's artifacts).
+ */
+export function useSyncChatArtifacts(messages: readonly ThreadMessageLike[]): void {
+	const setArtifacts = useSetAtom(chatArtifactsAtom);
+	const artifacts = useMemo(() => collectArtifacts(messages), [messages]);
+
+	useEffect(() => {
+		setArtifacts(artifacts);
+	}, [artifacts, setArtifacts]);
+
+	useEffect(() => () => setArtifacts([]), [setArtifacts]);
+}