refactor: remove departmentId from Class entity

apps/server/src/classes/classes.controller.ts

@@ -86,27 +86,6 @@ export class ClassesController {
     return result;
   }
 
-  /** 从钉钉同步部门创建班级 */
-  @Post('from-department')
-  @RequirePermission('class:create')
-  async createFromDepartment(
-    @Body() dto: { departmentId: number; name?: string; classType?: string },
-    @Request() req: any,
-  ) {
-    const result = await this.service.createFromDepartment(dto);
-    await this.logService.log({
-      userId: req.user?.id,
-      username: req.user?.username,
-      module: '班级管理',
-      action: '从部门创建班级',
-      targetId: result.id,
-      targetType: 'class',
-      detail: `班级${result.code} ${result.name}`,
-      ipAddress: extractRequestInfo(req).ipAddress,
-      userAgent: extractRequestInfo(req).userAgent,
-    });
-    return result;
-  }
 
   /** 批量导入学生到班级（通过钉钉用户ID） */
   @Post(':id/students/import')