migrate account store to composition API and typescript

src/stores/index.js

@@ -2,7 +2,7 @@ import { defineStore } from 'pinia';
 
 import { useSettingsStore } from './setting.ts';
 import { useUserStore } from './user.ts';
-import { useAccountsStore } from './account.js';
+import { useAccountsStore } from './account.ts';
 import { useTransactionCategoriesStore } from './transactionCategory.ts';
 import { useTransactionTagsStore } from './transactionTag.ts';
 import { useTransactionTemplatesStore } from './transactionTemplate.js';