Normalize active session ids in frontend

frontend/app/components/assistant-ui/threadlist-sidebar.tsx

@@ -357,15 +357,20 @@ function useSidebarSessions(open: boolean) {
 			repository: ExportedMessageRepository,
 		) => void,
 	) {
-		window.localStorage.setItem("claw.activeSessionId", sessionId);
+		const cleanSessionId = normalizeSessionId(sessionId);
+		if (!cleanSessionId) return;
+		window.localStorage.setItem("claw.activeSessionId", cleanSessionId);
 		setLoadingSessionId(sessionId);
 		try {
-			const response = await fetch(`/api/claw/sessions/${sessionId}`, {
+			const response = await fetch(`/api/claw/sessions/${cleanSessionId}`, {
 				cache: "no-store",
 			});
 			if (!response.ok) return;
 			const payload = (await response.json()) as ReplaySessionPayload;
-			replaySession(sessionId, toReplayRepository(payload, sessionId));
+			replaySession(
+				cleanSessionId,
+				toReplayRepository(payload, cleanSessionId),
+			);
 		} finally {
 			setLoadingSessionId(null);
 		}
@@ -430,13 +435,15 @@ function AccountMenu({
 					: [];
 				setState(nextState);
 				setSessions(nextSessions);
-				const activeSessionId =
+				const activeSessionId = normalizeSessionId(
 					window.localStorage.getItem("claw.activeSessionId") ??
-					nextState?.active_session_id;
+						nextState?.active_session_id,
+				);
 				if (!activeSessionId) {
 					setActiveSession(null);
 					return;
 				}
+				window.localStorage.setItem("claw.activeSessionId", activeSessionId);
 				const response = await fetch(`/api/claw/sessions/${activeSessionId}`, {
 					cache: "no-store",
 				});
@@ -610,6 +617,12 @@ function AccountMenu({
 	);
 }
 
+function normalizeSessionId(value: unknown) {
+	if (typeof value !== "string") return null;
+	const trimmed = value.trim();
+	return trimmed || null;
+}
+
 function aggregateUsageByModel(sessions: ClawSessionSummary[]) {
 	const byModel = new Map<
 		string,