Method getAttachment

src/app/repo/agent_chat.ts:119–135

(id: string)

  // 读取附件数据为 Blob（先查 workspace 新路径，fallback 旧路径）
  async getAttachment(id: string): Promise<Blob | null> {
    // 新路径: agents/workspace/uploads/{id}
    try {
      const workspace = await getWorkspaceRoot();
      const dir = await getDirectory(workspace, "uploads");
      return await (await dir.getFileHandle(id)).getFile();
    } catch {
      // 新路径不存在，尝试旧路径
    }
    // 旧路径回退: agents/conversations/attachments/{id}
    try {
      const dir = await this.getChildDir(ATTACHMENTS_DIR);
      return await (await dir.getFileHandle(id)).getFile();
    } catch {
      return null;
    }
  }

  // 删除单个附件（同时清理新旧路径）
  async deleteAttachment(id: string): Promise<void> {