refactor: 调整路由结构，使告警板块支持子路由

src/layouts/app-layout.vue

@@ -77,9 +77,15 @@ const menuOptions: MenuOption[] = [
     icon: renderIcon(HddFilled),
   },
   {
-    label: () => h(RouterLink, { to: '/alarm' }, { default: () => '设备告警' }),
+    label: '设备告警',
     key: '/alarm',
     icon: renderIcon(AlertFilled),
+    children: [
+      {
+        label: () => h(RouterLink, { to: '/alarm/alarm-log' }, { default: () => '设备告警记录' }),
+        key: '/alarm/alarm-log',
+      },
+    ],
   },
   {
     label: '系统日志',