Function addStep

ui/src/stores/thinking.ts:67–75

(messageId: string, step: ThinkingStep)

   * 添加思维步骤
   */
  const addStep = (messageId: string, step: ThinkingStep) => {
    const steps = stepsByMessage.value.get(messageId) || [];
    steps.push({
      ...step,
      id: step.id || `step-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`,
      messageId,
    });
    stepsByMessage.value.set(messageId, steps);
  };

  /**
   * 添加工具调用步骤