feat: add OperationSetting component and integrate into settings page

- Introduced OperationSetting component for managing agent configurations.
- Updated settings page to include a new tab for operation settings.
- Implemented functionality to fetch and update agent parameters such as heartbeat interval, sync interval, and auto-update settings.

docs: enhance deployment documentation for agent installation

- Added detailed instructions for agent installation using a script.
- Included examples for using discovery and agent tokens.
- Updated sections on global discovery tokens and agent auto-update features.

docs: revise design and development guidelines for V3

- Updated design document to reflect the current state and goals for V3.
- Clarified development guidelines to focus on operational experience improvements.

ci: add GitHub Actions workflow for agent releases

- Created a new workflow to automate the release of agent binaries on GitHub.
- Configured the workflow to build binaries for multiple platforms and publish them as releases.

feat: implement self-update mechanism for agent

- Added updater module to handle checking for and applying updates from GitHub releases.
- Implemented logic to restart the agent after a successful update.

chore: create install script for agent deployment

- Developed a bash script to facilitate the installation of the ATSFlare agent.
- The script supports automatic configuration and systemd service creation.

docs/development-guidelines.md

@@ -1,13 +1,13 @@
-# ATSFlare 开发规范（V3 准备版）
+# ATSFlare 开发规范（V3）
 
 ## 1. 适用范围
 
-本规范适用于当前代码基线以及第三版开始前后的所有开发工作。
+本规范适用于当前代码基线以及第三版的所有开发工作。
 
 当前系统状态：
 
 * 第一版、第二版功能已完成
-* 当前开发重点不再是补历史阶段细节，而是稳定基线并准备第三版
+* 第三版聚焦运维体验优化
 * 超出 `docs/design.md` 当前边界的需求，必须先补设计，再编码
 
 ---
@@ -202,6 +202,14 @@ Agent 必须满足：
 * 本地状态文件损坏时允许重建，但不能破坏当前生效配置
 * Docker 容器异常时，启动阶段应自动重建
 
+V3 新增行为：
+
+* 心跳响应包含 `agent_settings` 时，动态调整定时器间隔
+* `auto_update=true` 时在每次心跳后检查 GitHub Releases 更新
+* 自我更新失败不影响心跳与同步
+* Server 下发的间隔值不持久化到 `agent.json`，重启后以本地为准
+* Agent 新增 `internal/updater` 模块处理自我更新逻辑
+
 ---
 
 ## 8. 前端开发规范