Function markCompletion

frontend/src/components/timeline/AgentTracePanel.tsx:942–946

(step: AgentDerivedStep)

  const findFallbackSnapshot = () => snapshots.find((candidate) => !candidate.hasReasoning);

  const markCompletion = (step: AgentDerivedStep) => {
    step.isComplete = Boolean(
      step.finishedAt || (step.finishReason && step.finishReason !== 'tool-calls'),
    );
  };

  parts.forEach((entry) => {
    const chunk = entry.chunk as any;