feat: implement server self-upgrade functionality

- Added update service to fetch the latest server release from GitHub.
- Implemented server upgrade scheduling and execution logic.
- Created platform-specific restart mechanisms for Unix and Windows.
- Introduced API endpoints for fetching the latest release and triggering upgrades.
- Developed UI components for version upgrade modal, including loading and error states.
- Updated documentation to reflect new upgrade features and instructions.
- Refactored settings types to streamline interface definitions.

docs/deployment.md

@@ -84,12 +84,18 @@ volumes:
 docker compose up -d
 ```
 
-说明：
-
-* `SESSION_SECRET` 必须替换为随机字符串
-* SQLite 数据文件持久化到 Docker volume `atsflare-data`
-* 镜像默认监听容器内 `3000` 端口
-* 若要固定版本，可将 `latest` 替换为具体 tag，例如 `ghcr.io/rain-kl/atsflare:v0.3.0`
+说明：
+
+* `SESSION_SECRET` 必须替换为随机字符串
+* SQLite 数据文件持久化到 Docker volume `atsflare-data`
+* 镜像默认监听容器内 `3000` 端口
+* 若要固定版本，可将 `latest` 替换为具体 tag，例如 `ghcr.io/rain-kl/atsflare:v0.3.0`
+
+版本升级说明：
+
+* Root 用户可在管理端顶栏点击「版本」检查 GitHub 最新 Release
+* 当前运行的是 Release 二进制且二进制目录可写时，可直接在弹窗内触发 Server 自升级
+* 自升级会下载匹配当前平台的 `atsflare-server-*` 资产，替换当前二进制并自动重启进程
 
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