Fix active run elapsed restore

backend/api/server.py

@@ -1357,6 +1357,7 @@ def create_app(state: AgentState) -> FastAPI:
             started_event = {
                 'type': 'run_started',
                 'run_id': run_record.run_id,
+                'started_at': run_record.started_at,
                 'session_id': requested_session_id or '',
                 'account_id': request.account_id or '',
             }

frontend/app/components/assistant-ui/thread-list.tsx

@@ -78,6 +78,9 @@ type ClawActiveRunStatus = ClawRunStatus & {
 
 type ClawRunEvent = {
 	type?: string;
+	started_at?: unknown;
+	recorded_at?: unknown;
+	elapsed_ms?: unknown;
 	tool_name?: string;
 	tool_call_id?: string;
 	arguments?: unknown;
@@ -500,6 +503,7 @@ export function toReplayRepository(
 	}
 	if (isActiveRunStatus(runStatus)) {
 		const id = `${fallbackSessionId}-run-${runStatus.run_id ?? "active"}`;
+		const runStartedAtMs = resolveRunStartedAtMs(runStatus);
 		const parts = buildActiveRunParts(runStatus) as UIMessage["parts"];
 		const uiMessage: UIMessage = {
 			id,
@@ -508,7 +512,7 @@ export function toReplayRepository(
 			metadata: {
 				sessionId: session.session_id ?? fallbackSessionId,
 				runId: runStatus.run_id,
-				runStartedAtMs: normalizeRunTimestampMs(runStatus.started_at),
+				runStartedAtMs,
 			},
 		} as UIMessage;
 		const threadMessage = {
@@ -525,7 +529,7 @@ export function toReplayRepository(
 				custom: {
 					sessionId: session.session_id ?? fallbackSessionId,
 					runId: runStatus.run_id,
-					runStartedAtMs: normalizeRunTimestampMs(runStatus.started_at),
+					runStartedAtMs,
 				},
 			},
 		} as ThreadMessage;
@@ -552,7 +556,7 @@ function buildActiveRunParts(runStatus: ClawActiveRunStatus) {
 			? "当前会话已有任务在执行，本轮正在排队。"
 			: runStatus.current_stage || "后端正在执行这个会话。";
 	const reasoningText = eventLines.length ? eventLines.join("\n") : fallback;
-	const runStartedAtMs = normalizeRunTimestampMs(runStatus.started_at);
+	const runStartedAtMs = resolveRunStartedAtMs(runStatus);
 	return [
 		{ type: "reasoning", text: reasoningText, runStartedAtMs },
 		...buildRunToolParts(runStatus.events ?? []),
@@ -723,6 +727,34 @@ function normalizeElapsedMs(value: unknown) {
 	return Math.max(0, Math.round(value));
 }
 
+function resolveRunStartedAtMs(runStatus: ClawRunStatus) {
+	const direct = normalizeRunTimestampMs(runStatus.started_at);
+	if (direct !== undefined) return direct;
+
+	for (const event of runStatus.events ?? []) {
+		if (event.type !== "run_started") continue;
+		const eventStarted = normalizeRunTimestampMs(event.started_at);
+		if (eventStarted !== undefined) return eventStarted;
+		const recordedAt = normalizeRunTimestampMs(event.recorded_at);
+		if (recordedAt !== undefined) return recordedAt;
+	}
+
+	for (const event of runStatus.events ?? []) {
+		const recordedAt = normalizeRunTimestampMs(event.recorded_at);
+		const elapsedMs = normalizeElapsedMs(event.elapsed_ms);
+		if (recordedAt !== undefined && elapsedMs !== undefined) {
+			return Math.max(0, recordedAt - elapsedMs);
+		}
+	}
+
+	for (const event of runStatus.events ?? []) {
+		const recordedAt = normalizeRunTimestampMs(event.recorded_at);
+		if (recordedAt !== undefined) return recordedAt;
+	}
+
+	return undefined;
+}
+
 function resolveReplayElapsedMs(
 	messages: readonly ClawStoredMessage[],
 	index: number,

frontend/app/components/assistant-ui/thread.tsx

@@ -1475,7 +1475,11 @@ const ActivityChainSummary: FC<{
 			return;
 		}
 		const startedAt =
-			metadataRunStartedAtMs ?? contentRunStartedAtMs ?? startedAtRef.current;
+			metadataRunStartedAtMs ??
+			contentRunStartedAtMs ??
+			(storedElapsedMs === null
+				? startedAtRef.current
+				: Date.now() - storedElapsedMs);
 		setElapsedMs(Math.max(0, Date.now() - startedAt));
 		const timer = window.setInterval(() => {
 			setElapsedMs(Math.max(0, Date.now() - startedAt));