typo fix

backend/src/main/java/com/example/todoapp/repository/StocksRepository.java

@@ -1,5 +1,5 @@
 //--------------------------------
-// ToBuysRepository.java
+// StocksRepository.java
 //
 //
 // 更新履歴：2025/06/05 新規作成 

backend/src/main/java/com/example/todoapp/service/ToBuysService.java

@@ -11,7 +11,6 @@ package com.example.todoapp.service;
 import com.example.todoapp.util.MessageUtils;
 
 import com.example.todoapp.dto.ToBuysDTO;
-import com.example.todoapp.dto.ToBuysBuyDTO;
 import com.example.todoapp.model.Stocks;
 import com.example.todoapp.model.Stuffs;
 import com.example.todoapp.model.ToBuys;
@@ -52,7 +51,7 @@ public class ToBuysService {
     private StuffsRepository stuffsRepository;
     
     @Autowired
-    private StuffsRepository stocksRepository;
+    private StocksRepository stocksRepository;
 
     @Autowired
     private MessageUtils messageUtils;
@@ -178,7 +177,7 @@ public class ToBuysService {
         stock.setExp_date(dto.getExp_date());
         deleteToBuyByIds(dto.getUser_id(), dto.getTobuy_id());
         // データベースに保存
-        return stockRepository.save(stock);
+        return stocksRepository.save(stock);
     }
 
     /**