Fix run cancellation and live activity stability

frontend/app/components/assistant-ui/activity-panel.tsx

@@ -979,10 +979,6 @@ function summarizeLiveRunEvents(
 		if (event.type === "run_started") {
 			lines.push("后端已开始执行本轮任务。");
 		}
-		if (event.type === "content_delta" && event.delta) {
-			const note = event.delta.trim();
-			if (note && !isNoisyLiveDelta(note)) lines.push(note);
-		}
 		if (event.type === "tool_start") {
 			const stageNote =
 				typeof event.assistant_content === "string"

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

@@ -610,10 +610,6 @@ function summarizeRunEvents(runStatus: ClawActiveRunStatus) {
 		if (event.type === "run_started") {
 			lines.push("后端已开始执行本轮任务。");
 		}
-		if (event.type === "content_delta" && event.delta) {
-			const note = event.delta.trim();
-			if (note && !isNoisyLiveDelta(note)) lines.push(note);
-		}
 		if (event.type === "tool_start") {
 			const stageNote =
 				typeof event.assistant_content === "string"

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

@@ -860,7 +860,11 @@ const ComposerAction: FC = () => {
 		includePending: true,
 		includeActive: true,
 	});
+	const [runtimeCancelling, setRuntimeCancelling] = useState(false);
 	const cancelSessionId = replayedRun.sessionId ?? currentSessionId;
+	useEffect(() => {
+		if (!runtimeRunning) setRuntimeCancelling(false);
+	}, [runtimeRunning]);
 	return (
 		<div className="aui-composer-action-wrapper relative flex items-center justify-between">
 			<div className="flex items-center gap-1">
@@ -890,12 +894,15 @@ const ComposerAction: FC = () => {
 					size="icon"
 					className="aui-composer-cancel size-8 rounded-full"
 					aria-label="Stop generating"
-					disabled={!cancelSessionId}
+					disabled={!cancelSessionId || runtimeCancelling}
 					onClick={() => {
 						if (!cancelSessionId) return;
-						void cancelLatestRun(cancelSessionId, replayedRun.runId).catch(
-							() => undefined,
-						);
+						setRuntimeCancelling(true);
+						void cancelLatestRun(cancelSessionId, replayedRun.runId)
+							.catch(() => undefined)
+							.finally(() => {
+								window.setTimeout(() => setRuntimeCancelling(false), 1200);
+							});
 					}}
 				>
 					<SquareIcon className="aui-composer-cancel-icon size-3 fill-current" />