feat: 更新服务 — ZIP下载/备份/回滚/重启

UpdateService:
- 分支感知: 从 base_config 读取 branch, 拼接 archive/{branch}.zip
- 定时检查: 每6h 拉取 version.json 比对版本
- 更新前自动打包备份 (zip, 保留最新5个)
- 保护用户配置: base_config.yaml / plugins/*/config.yaml / data/
- 子进程 pip install 依赖

API:
- GET /api/updates — 更新状态
- POST /api/updates/check — 手动检查
- POST /api/updates/apply — 执行更新

回滚:
- python main.py --rollback  — 恢复到最新备份
- 无备份时提示

重启:
- .restart_flag 信号文件 → 优雅退出 → systemd 拉起

Co-Authored-By: Claude <noreply@anthropic.com>

main.py

@@ -12,6 +12,8 @@ from services.pyenv_manager import PyEnvManager
 from services.proxy_service import ProxyService
 from services.web_panel.utils.system_info import SystemInfoCollector
 from services.sensu_db import SenSuDB
+from services.update_service import UpdateService
+from services.update_service import UpdateService
 import os
 from pathlib import Path
 
@@ -223,6 +225,13 @@ class SenSuFramework:
                 await proxy_service.start()
                 self.service_manager.register_service("proxy", proxy_service)
                 logger.info("✅ 项目引擎+反向代理就绪")
+
+                logger.info("> 初始化 更新检测 中...")
+                update_service = UpdateService(self.service_manager)
+                await update_service.start()
+                self.service_manager.register_service("update", update_service)
+                logger.info("✅ 更新检测就绪")
+
             except Exception as e:
                 logger.warning(f"引擎/代理初始化跳过: {e}")
 
@@ -355,7 +364,14 @@ class SenSuFramework:
             # 特殊终端，添加命令行输入处理
             tui = self.service_manager.get_service("tui")
             if self.headless:
+                import os as _os
+                restart_flag = _os.path.join(_os.path.dirname(__file__), ".restart_flag")
                 while self.is_running:
+                    if _os.path.exists(restart_flag):
+                        logger.info("🔄 检测到重启标记, 执行优雅重启...")
+                        _os.remove(restart_flag)
+                        await self._restart_framework()
+                        break
                     try: await asyncio.sleep(1)
                     except asyncio.CancelledError: break
             elif not hasattr(tui, 'tui_app'):
@@ -377,6 +393,13 @@ class SenSuFramework:
         except Exception as e:
             logger.error(f"运行框架主循环时出错: {str(e)}", exc_info=True)
             await self._safe_shutdown()
+
+    async def _restart_framework(self):
+        """优雅重启: 关闭所有服务后退出 (由 systemd/supervisor 自动拉起)"""
+        logger.info("🔄 执行优雅重启...")
+        await self.shutdown()
+        import sys as _sys
+        _sys.exit(0)
     
     async def _run_cli_mode(self):
         """运行命令行模式"""
@@ -429,6 +452,38 @@ class SenSuFramework:
             logger.error(f"关闭框架时出错: {str(e)}", exc_info=True)
             await self._safe_shutdown()
 
+def rollback():
+    """回滚到最新备份"""
+    import zipfile, shutil, os, glob
+    backup_dir = os.path.join(os.path.dirname(__file__), "data", "backups")
+    if not os.path.isdir(backup_dir):
+        print("📭 没有备份目录")
+        return
+    backups = sorted(glob.glob(os.path.join(backup_dir, "SenSu_backup_*.zip")), key=os.path.getmtime, reverse=True)
+    if not backups:
+        print("📭 没有可用的备份包")
+        return
+    latest = backups[0]
+    name = os.path.basename(latest)
+    print(f"📦 回滚到: {name}")
+    try:
+        import tempfile
+        with tempfile.TemporaryDirectory() as tmp:
+            with zipfile.ZipFile(latest, "r") as zf:
+                zf.extractall(tmp)
+            project_root = os.path.dirname(__file__)
+            for item in os.listdir(tmp):
+                src = os.path.join(tmp, item)
+                dst = os.path.join(project_root, item)
+                if os.path.isdir(src):
+                    shutil.copytree(src, dst, dirs_exist_ok=True)
+                else:
+                    shutil.copy2(src, dst)
+        print("✅ 回滚完成, 请重启 SenSu")
+    except Exception as e:
+        print(f"❌ 回滚失败: {e}")
+
+
 async def main(headless=False):
     """主函数"""
     framework = SenSuFramework(headless=headless)
@@ -466,7 +521,13 @@ if __name__ == "__main__":
         # 运行主程序
         parser = argparse.ArgumentParser(description="SenSu")
         parser.add_argument("--headless", action="store_true")
+        parser.add_argument("--rollback", action="store_true", help="回滚到最新备份")
         args = parser.parse_args()
+
+        if args.rollback:
+            rollback()
+            sys.exit(0)
+
         asyncio.run(main(headless=args.headless))
         
     except KeyboardInterrupt: