Replace absolute imports with relative imports

src/accounting/forms.py

@@ -1,7 +1,7 @@
 # The Mia! Accounting Project.
 # Author: imacat@mail.imacat.idv.tw (imacat), 2023/3/22
 
-#  Copyright (c) 2023 imacat.
+#  Copyright (c) 2023-2026 imacat.
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -24,10 +24,9 @@ from flask_wtf import FlaskForm
 from wtforms import StringField, ValidationError
 from wtforms.validators import DataRequired
 
-from accounting import db
-from accounting.locale import lazy_gettext
-from accounting.models import Currency, Account
-
+from . import db
+from .locale import lazy_gettext
+from .models import Currency, Account
 
 ACCOUNT_REQUIRED: DataRequired = DataRequired(
     lazy_gettext("Please select the account."))