NexaAct 0.2.3

Release Notes

Added nested MultiAgent support with child-agent progress, cancellation, desktop-control ownership, and a separate live task summary. The setting is remembered across restarts.
Improved conversation flow and editing: follow-up messages keep their order, edited turns stop safely before resubmission, and reasoning summaries no longer lose content.
Expanded third-party provider support with Grok and GitHub Copilot account sign-in, API-key access, clearer account-versus-key routing, curated model visibility, and safer model configuration migration.
Improved long-task reliability across providers with restored thread settings, reasoning controls, automatic recovery from transient failures, continued output after limits, and clearer error reporting.
Added integrated Computer Use with screenshots, mouse and keyboard control, local confirmations, session limits, permission-aware fallbacks, and support for macOS, Linux, and Windows.
Added richer workspace tools: Git status and actions, before/after snapshots, safe restore checks, edited-file summaries with diffs, isolated Worktrees, and safe language-server discovery.
Added provider-independent image generation with streamed previews, local artifacts, capability-aware routing, and updated model defaults.
Improved background browsing and preview workflows with on-demand startup, task-isolated tabs, durable confirmation delivery, and safer cleanup of task-owned resources.

新增可嵌套 MultiAgent，支持查看子代理进度、取消状态和桌面控制权，并提供独立的实时任务汇总；设置会在重启后保留。
优化对话与编辑流程：补充消息顺序更稳定，编辑重发会先安全中止旧任务，思考摘要也不会丢失内容。
扩展第三方供应商支持，新增 Grok 和 GitHub Copilot 账号登录及 API Key 访问，明确账号与 API Key 路由，简化模型目录，并自动迁移旧模型配置。
提升长任务稳定性：恢复完整线程设置，保留推理强度，支持临时故障自动恢复、输出上限后继续执行，并提供更清晰的错误信息。
新增内嵌 Computer Use，支持截图、鼠标键盘操作、本机确认、会话时限和权限降级，兼容 macOS、Linux 与 Windows。
增强工作区工具：提供 Git 状态与操作、任务前后快照、安全恢复检查、带 diff 的已编辑文件汇总、隔离 Worktree 和安全语言服务器发现。
新增供应商无关的生图能力：图片会实时预览并保存到本地，按供应商能力选择路由，并更新内置模型默认值。
优化后台浏览与预览：按需启动、任务级标签页隔离、可靠的确认投递，以及更安全的任务资源清理。

If macOS reports that NexaAct is damaged or cannot verify its developer, do not remove quarantine attributes from an unverified download.
Confirm the package checksum against the official GitHub Release. If it matches, move NexaAct to Applications and use System Settings > Privacy & Security > Open Anyway to authorize the app.
Unattended installation should only be used with a signed and Apple-notarized package.

如果 macOS 提示 NexaAct 已损坏或无法验证开发者，不要对未经验证的下载文件移除隔离属性。
请先使用官方 GitHub Release 中的校验值核对安装包。校验一致后，将 NexaAct 移到 Applications，并通过 系统设置 > 隐私与安全性 > 仍要打开 授权。
只有完成签名和 Apple 公证的安装包才应支持无人值守安装。