diff --git a/frontend/app/components/assistant-ui/activity-panel.tsx b/frontend/app/components/assistant-ui/activity-panel.tsx
index 2da6c7d..e3339db 100644
--- a/frontend/app/components/assistant-ui/activity-panel.tsx
+++ b/frontend/app/components/assistant-ui/activity-panel.tsx
@@ -31,6 +31,10 @@ import {
 	useRef,
 	useState,
 } from "react";
+import {
+	type ClawRunStatus,
+	fetchLatestRunStatus,
+} from "@/components/assistant-ui/thread-list";
 import { Button } from "@/components/ui/button";
 import {
 	Collapsible,
@@ -38,6 +42,7 @@ import {
 	CollapsibleTrigger,
 } from "@/components/ui/collapsible";
 import {
+	ACTIVE_SESSION_CHANGED_EVENT,
 	readActiveSessionId,
 	writeActiveSessionId,
 } from "@/lib/claw-active-session";
@@ -133,6 +138,8 @@ type ActivityItem = {
 	fileLinks?: string[];
 };
 
+type LiveRunEvent = NonNullable<ClawRunStatus["events"]>[number];
+
 export function ActivityPanel() {
 	const {
 		open,
@@ -145,13 +152,49 @@ export function ActivityPanel() {
 		close,
 	} = useActivityPanel();
 	const messages = useAuiState((s) => s.thread.messages);
-	const items = useMemo(() => collectActivityItems(messages), [messages]);
+	const [activeSessionId, setActiveSessionId] = useState<string | null>(() =>
+		readActiveSessionId(),
+	);
+	const liveRunStatus = useLiveRunStatus(activeSessionId, mode);
+	const replayedSessionId = useMemo(
+		() => findLatestSessionIdInMessages(messages),
+		[messages],
+	);
+	const messageItems = useMemo(
+		() => collectActivityItems(messages),
+		[messages],
+	);
+	const liveItems = useMemo(
+		() => collectLiveRunItems(liveRunStatus),
+		[liveRunStatus],
+	);
+	const shouldUseLiveItems =
+		liveItems.length > 0 &&
+		activeSessionId !== null &&
+		(activeSessionId !== replayedSessionId || hasActiveRun(liveRunStatus));
+	const items = shouldUseLiveItems ? liveItems : messageItems;
 	const selectedMessageId = selectedId ? activityMessageId(selectedId) : null;
 	const visibleItems = selectedMessageId
 		? items.filter((item) => activityMessageId(item.id) === selectedMessageId)
 		: items;
 	const prevLatestIdRef = useRef<string | null>(null);
 
+	useEffect(() => {
+		const update = () => setActiveSessionId(readActiveSessionId());
+		const handleChanged = (event: Event) => {
+			const detail = (event as CustomEvent<{ sessionId?: string | null }>)
+				.detail;
+			setActiveSessionId(detail?.sessionId ?? readActiveSessionId());
+		};
+		window.addEventListener(ACTIVE_SESSION_CHANGED_EVENT, handleChanged);
+		window.addEventListener("focus", update);
+		update();
+		return () => {
+			window.removeEventListener(ACTIVE_SESSION_CHANGED_EVENT, handleChanged);
+			window.removeEventListener("focus", update);
+		};
+	}, []);
+
 	useEffect(() => {
 		const latestId = items.at(-1)?.id ?? null;
 		if (
@@ -657,6 +700,60 @@ function activityMessageId(activityId: string) {
 	return activityId.split(":", 1)[0] ?? activityId;
 }
 
+function useLiveRunStatus(
+	sessionId: string | null,
+	mode: ActivityContextValue["mode"],
+) {
+	const [status, setStatus] = useState<ClawRunStatus | null>(null);
+
+	useEffect(() => {
+		if (!sessionId || mode !== "activity") {
+			setStatus(null);
+			return;
+		}
+		const safeSessionId = sessionId;
+		let cancelled = false;
+
+		async function refresh() {
+			const nextStatus = await fetchLatestRunStatus(safeSessionId);
+			if (cancelled) return;
+			setStatus(hasActiveRun(nextStatus) ? nextStatus : null);
+		}
+
+		refresh();
+		const interval = window.setInterval(refresh, 1000);
+		return () => {
+			cancelled = true;
+			window.clearInterval(interval);
+		};
+	}, [sessionId, mode]);
+
+	return status;
+}
+
+function hasActiveRun(
+	status?: ClawRunStatus | null,
+): status is ClawRunStatus & { status: "queued" | "running" } {
+	return status?.status === "queued" || status?.status === "running";
+}
+
+function findLatestSessionIdInMessages(messages: readonly MessageState[]) {
+	for (const message of [...messages].reverse()) {
+		const metadata = message.metadata;
+		const custom =
+			metadata && typeof metadata === "object" && "custom" in metadata
+				? (metadata as { custom?: unknown }).custom
+				: null;
+		if (custom && typeof custom === "object" && "sessionId" in custom) {
+			const sessionId = (custom as { sessionId?: unknown }).sessionId;
+			if (typeof sessionId === "string" && sessionId.trim()) {
+				return sessionId.trim();
+			}
+		}
+	}
+	return null;
+}
+
 function ActivityPanelItem({
 	item,
 	open,
@@ -770,6 +867,118 @@ function ActivityResultSummary({ value }: { value: string }) {
 	);
 }
 
+function collectLiveRunItems(runStatus: ClawRunStatus | null) {
+	if (!hasActiveRun(runStatus)) return [];
+	const items: ActivityItem[] = [];
+	const events = runStatus.events ?? [];
+	const summaryLines = summarizeLiveRunEvents(runStatus, events);
+	items.push({
+		id: `live:${runStatus.run_id ?? runStatus.session_id ?? "active"}:reasoning`,
+		kind: "reasoning",
+		title: runStatus.status === "queued" ? "排队中" : "思考中",
+		summary: summaryLines.join("\n"),
+		status: "running",
+	});
+
+	const resultById = new Map<string, LiveRunEvent>();
+	for (const event of events) {
+		if (event.type === "tool_result" && event.tool_call_id) {
+			resultById.set(event.tool_call_id, event);
+		}
+	}
+	const seenToolCalls = new Set<string>();
+	for (const event of events) {
+		if (
+			event.type !== "tool_start" ||
+			!event.tool_call_id ||
+			!event.tool_name ||
+			seenToolCalls.has(event.tool_call_id)
+		) {
+			continue;
+		}
+		seenToolCalls.add(event.tool_call_id);
+		const result = resultById.get(event.tool_call_id);
+		const resultSummary =
+			typeof result?.metadata?.output_preview === "string"
+				? result.metadata.output_preview
+				: result
+					? result.ok === false
+						? "工具执行失败，等待最终结果汇总。"
+						: "工具调用完成，等待最终结果汇总。"
+					: undefined;
+		const input = stripClawToolMetadata(
+			attachStageNote(event.arguments ?? {}, event.assistant_content),
+		);
+		const argsText = formatToolArgs(input);
+		items.push({
+			id: `live:${runStatus.run_id ?? runStatus.session_id ?? "active"}:${event.tool_call_id}`,
+			kind: "tool",
+			title: event.tool_name,
+			summary: result
+				? result.ok === false
+					? "工具调用失败"
+					: "工具调用完成"
+				: "工具调用中",
+			status: result
+				? result.ok === false
+					? "incomplete"
+					: "complete"
+				: "running",
+			argsText,
+			resultSummary,
+			rawResult: resultSummary,
+			fileLinks: extractLocalPaths(
+				[argsText, resultSummary].filter(Boolean) as string[],
+			),
+		});
+	}
+	return items;
+}
+
+function summarizeLiveRunEvents(
+	runStatus: ClawRunStatus,
+	events: readonly LiveRunEvent[],
+) {
+	const lines: string[] = [];
+	for (const event of events) {
+		if (event.type === "run_queued") {
+			lines.push("当前会话已有任务在执行，本轮正在排队。");
+		}
+		if (event.type === "run_started") {
+			lines.push("后端已开始执行本轮任务。");
+		}
+		if (event.type === "tool_start") {
+			const stageNote =
+				typeof event.assistant_content === "string"
+					? event.assistant_content.trim()
+					: "";
+			lines.push(
+				stageNote ||
+					(event.tool_name ? `调用工具 ${event.tool_name}` : "正在调用工具"),
+			);
+		}
+		if (event.type === "tool_result") {
+			lines.push(
+				event.tool_name ? `工具完成 ${event.tool_name}` : "工具调用完成",
+			);
+		}
+		if (event.type === "final_text_start") {
+			lines.push("正在整理回复");
+		}
+	}
+	if (runStatus.current_stage && lines.at(-1) !== runStatus.current_stage) {
+		lines.push(runStatus.current_stage);
+	}
+	if (!lines.length) {
+		lines.push(
+			runStatus.status === "queued"
+				? "当前会话已有任务在执行，本轮正在排队。"
+				: "后端正在执行这个会话。",
+		);
+	}
+	return lines.slice(-40);
+}
+
 function collectActivityItems(messages: readonly MessageState[]) {
 	const items: ActivityItem[] = [];
 
@@ -841,6 +1050,15 @@ function getStageNote(value: unknown) {
 	return typeof note === "string" ? note.trim() : "";
 }
 
+function attachStageNote(input: unknown, stageNote?: unknown) {
+	const note = typeof stageNote === "string" ? stageNote.trim() : "";
+	if (!note) return input;
+	if (input && typeof input === "object" && !Array.isArray(input)) {
+		return { ...(input as Record<string, unknown>), __claw_stage_note: note };
+	}
+	return { value: input, __claw_stage_note: note };
+}
+
 function stripClawToolMetadata(value: unknown): unknown {
 	if (!value || typeof value !== "object" || Array.isArray(value)) return value;
 	const {
diff --git a/frontend/app/lib/claw-active-session.ts b/frontend/app/lib/claw-active-session.ts
index 0995a71..5227b98 100644
--- a/frontend/app/lib/claw-active-session.ts
+++ b/frontend/app/lib/claw-active-session.ts
@@ -1,6 +1,7 @@
 "use client";
 
 const ACTIVE_SESSION_ID_KEY = "claw.activeSessionId";
+export const ACTIVE_SESSION_CHANGED_EVENT = "claw-active-session-changed";
 
 export function readActiveSessionId() {
 	if (typeof window === "undefined") return null;
@@ -19,12 +20,22 @@ export function writeActiveSessionId(sessionId: string | null | undefined) {
 	}
 	window.sessionStorage.setItem(ACTIVE_SESSION_ID_KEY, normalized);
 	window.localStorage.setItem(ACTIVE_SESSION_ID_KEY, normalized);
+	window.dispatchEvent(
+		new CustomEvent(ACTIVE_SESSION_CHANGED_EVENT, {
+			detail: { sessionId: normalized },
+		}),
+	);
 }
 
 export function clearActiveSessionId() {
 	if (typeof window === "undefined") return;
 	window.sessionStorage.removeItem(ACTIVE_SESSION_ID_KEY);
 	window.localStorage.removeItem(ACTIVE_SESSION_ID_KEY);
+	window.dispatchEvent(
+		new CustomEvent(ACTIVE_SESSION_CHANGED_EVENT, {
+			detail: { sessionId: null },
+		}),
+	);
 }
 
 function normalizeSessionId(value: unknown) {