fixed a bug

server/routes/sudoku.ts

@@ -1,5 +1,5 @@
 import express, { Request, Response } from 'express';
-import { SudokuRecord, SudokuDifficulty } from '../models/SudokuRecord';
+import { SudokuRecord, SudokuDifficulty, SudokuGameMode } from '../models/SudokuRecord';
 import { auth } from '../middleware/auth';
 
 const router = express.Router();
@@ -7,7 +7,7 @@ const router = express.Router();
 // 提交数独记录（需要登录）
 router.post('/record', auth, async (req: Request, res: Response) => {
   try {
-    const { difficulty, timeSeconds, won } = req.body;
+    const { difficulty, timeSeconds, won, gameMode = 'standard' } = req.body;
 
     if (!req.user?._id) {
       return res.status(401).json({ error: '未登录' });
@@ -26,11 +26,17 @@ router.post('/record', auth, async (req: Request, res: Response) => {
       return res.status(400).json({ error: '无效的游戏结果' });
     }
 
+    const validGameModes: SudokuGameMode[] = ['standard', 'irregular'];
+    if (!validGameModes.includes(gameMode)) {
+      return res.status(400).json({ error: '无效的游戏模式' });
+    }
+
     const record = new SudokuRecord({
       userId: req.user._id,
       username: req.user.username,
       fullname: req.user.fullname || req.user.username,
       difficulty,
+      gameMode,
       timeSeconds,
       won
     });