refactor：重构业务层服务架构

- 重构共享模块，移除冗余DTO定义
- 优化Zulip服务模块，重新组织控制器结构
- 更新用户管理和认证服务
- 移除过时的登录服务测试文件

src/business/user_mgmt/user_status.controller.ts

@@ -27,7 +27,7 @@
 
 import { Body, Controller, Get, HttpCode, HttpStatus, Param, Put, Post, UseGuards, ValidationPipe, UsePipes, Logger } from '@nestjs/common';
 import { ApiBearerAuth, ApiBody, ApiOperation, ApiParam, ApiResponse, ApiTags } from '@nestjs/swagger';
-import { AdminGuard } from '../admin/guards/admin.guard';
+import { AdminGuard } from '../admin/admin.guard';
 import { UserManagementService } from './user_management.service';
 import { Throttle, ThrottlePresets } from '../../core/security_core/throttle.decorator';
 import { Timeout, TimeoutPresets } from '../../core/security_core/timeout.decorator';