Revised the calculation of "today" to use the client's timezone instead of the server's timezone.

src/accounting/static/js/timezone.js

@@ -0,0 +1,37 @@
+/* The Mia! Accounting Project
+ * timezone.js: The JavaScript for the timezone
+ */
+
+/*  Copyright (c) 2024 imacat.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/* Author: imacat@mail.imacat.idv.tw (imacat)
+ * First written: 2024/6/4
+ */
+"use strict";
+
+// Initializes the page JavaScript.
+document.addEventListener("DOMContentLoaded", () => {
+    setTimeZone();
+});
+
+/**
+ * Sets the time zone.
+ *
+ * @private
+ */
+function setTimeZone() {
+    document.cookie = `accounting-tz=${Intl.DateTimeFormat().resolvedOptions().timeZone}; SameSite=Strict`;
+}