Function updateTool

ui/src/stores/tools.ts:41–55

(id: string, updates: Partial<ToolCallSnapshot>)

   * 更新工具状态（细粒度更新）
   */
  const updateTool = (id: string, updates: Partial<ToolCallSnapshot>) => {
    const prev =
      toolRuns.value.get(id) ||
      ({
        id,
        name: "",
        state: "pending",
      } as ToolCallSnapshot);

    toolRuns.value.set(id, {
      ...prev,
      ...updates,
      updated_at: new Date().toISOString(),
    });
  };

  /**
   * 处理工具开始事件