refactor: 枚举、常量和插件文件重构优化

src/composables/layout/useDeviceDetection.ts

@@ -1,7 +1,7 @@
 import { watchEffect, computed } from "vue";
 import { useWindowSize } from "@vueuse/core";
 import { useAppStore } from "@/store";
-import { DeviceEnum } from "@/enums/settings/device-enum";
+import { DeviceEnum } from "@/enums/settings";
 
 /**
  * 设备检测和响应式处理

src/composables/websocket/useOnlineCount.ts

@@ -1,6 +1,6 @@
 import { ref, onMounted, onUnmounted, getCurrentInstance } from "vue";
 import { useStomp } from "./useStomp";
-import { registerWebSocketInstance } from "@/plugins/websocket";
+import { registerWebSocketInstance } from "@/utils/websocket";
 import { AuthStorage } from "@/utils/auth";
 
 /**