refactor: remove User-based import and RBAC UserDingMapping endpoints

apps/server/src/sync/sync.controller.ts

@@ -1,9 +1,8 @@
-import { BadRequestException, Body, Controller, Get, Logger, Post, Query, UseGuards } from '@nestjs/common';
+import { BadRequestException, Controller, Get, Logger, Post, Query, UseGuards } from '@nestjs/common';
 import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
 import { RequirePermission } from '../auth/decorators/permission.decorator';
 import { SyncService } from './sync.service';
 import type { SyncPlatform } from '../entities/sync-log.entity';
-import { ImportUsersDto } from './dto/import-users.dto';
 
 @UseGuards(JwtAuthGuard)
 @Controller('sync')
@@ -51,17 +50,6 @@ export class SyncController {
     return { success: true, data: tree };
   }
 
-  /** 导入钉钉用户：老师分配角色，学生创建 Student */
-  @Post('dingtalk/import-users')
-  @RequirePermission('sync:trigger')
-  async importDingTalkUsers(@Body() body: ImportUsersDto) {
-    this.logger.log(`[import] users=${body.users.length} classes=${body.classes?.length || 0}`);
-    this.logger.log(`[import] sample user: ${JSON.stringify(body.users[0])}`);
-    const result = await this.syncService.importDingTalkUsers(body.users, body.classes);
-    this.logger.log(`[import result] ${JSON.stringify(result)}`);
-    return { success: true, ...result };
-  }
-
   @Get('logs')
   @RequirePermission('sync:read')
   async getLogs(