refactor(system): 重构系统模块代码

- 重命名接口和服务类，统一命名规范
- 优化代码结构，提高可维护性
- 异步处理用户JWT和在线用户相关操作
- 更新MyBatis Plus相关类名和方法名

cutejava-front/src/store/getters.js

@@ -16,7 +16,7 @@ const getters = {
   fileUploadApi: state => state.api.fileUploadApi,
   updateAvatarApi: state => state.api.updateAvatarApi,
   qiNiuUploadApi: state => state.api.qiNiuUploadApi,
-  sqlApi: state => state.api.sqlApi,
+  druidSqlApi: state => state.api.druidSqlApi,
   swaggerApi: state => state.api.swaggerApi,
   websocketApi: state => state.api.websocketApi,
   sidebarRouters: state => state.permission.sidebarRouters