Add Traditional Chinese (Taiwan) localization support

- Add jQuery UI datepicker Traditional Chinese localization file
- Add complete zh-TW locale file with translations for all UI elements
- Configure asset precompilation for datepicker locale files

app/assets/javascripts-jquery-ui/datepicker-zh-TW.js

@@ -0,0 +1,40 @@
+/* Traditional Chinese (Taiwan) initialisation for the jQuery UI date picker plugin. */
+/* Written by Claude Code for Tracks application. */
+( function( factory ) {
+	"use strict";
+
+	if ( typeof define === "function" && define.amd ) {
+
+		// AMD. Register as an anonymous module.
+		define( [ "../widgets/datepicker" ], factory );
+	} else {
+
+		// Browser globals
+		factory( jQuery.datepicker );
+	}
+} )( function( datepicker ) {
+"use strict";
+
+datepicker.regional["zh-TW"] = {
+	closeText: "關閉",
+	prevText: "上一月",
+	nextText: "下一月",
+	currentText: "今天",
+	monthNames: [ "一月", "二月", "三月", "四月", "五月", "六月",
+	"七月", "八月", "九月", "十月", "十一月", "十二月" ],
+	monthNamesShort: [ "1月", "2月", "3月", "4月", "5月", "6月",
+	"7月", "8月", "9月", "10月", "11月", "12月" ],
+	dayNames: [ "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" ],
+	dayNamesShort: [ "日", "一", "二", "三", "四", "五", "六" ],
+	dayNamesMin: [ "日", "一", "二", "三", "四", "五", "六" ],
+	weekHeader: "週",
+	dateFormat: "yy/mm/dd",
+	firstDay: 0,
+	isRTL: false,
+	showMonthAfterYear: true,
+	yearSuffix: "年" };
+datepicker.setDefaults( datepicker.regional["zh-TW"] );
+
+return datepicker.regional["zh-TW"];
+
+} );