添加主程序引用数据库

Java/TodoListApp/src/TodoListManager.java

@@ -10,10 +10,12 @@ import java.time.format.DateTimeFormatter;
 class TodoListManager {
     private final List<TodoItem> todoList;
     private int nextId;
+    // private DatabaseManager dbManager; // 暂时注释掉
 
     public TodoListManager() {
         todoList = new ArrayList<>();
         nextId = 1; // 起始编号
+        // dbManager = new DatabaseManager(); // 
     }
 
     // 添加待办事项