fix: execSync → async spawn 解决更新卡死，页面自动检查版本，改进容器停止步骤

app/settings/update/page.tsx

@@ -42,6 +42,12 @@ export default function UpdatePage() {
     logEndRef.current?.scrollIntoView({behavior: "smooth"});
   }, [logs]);
 
+  // 页面加载时自动检查更新
+  useEffect(() => {
+    handleCheckUpdate();
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
   // 检查更新
   const handleCheckUpdate = useCallback(async () => {
     setCheckState("checking");