Fix chinese typography bug

lib/core/prefs/locale_prefs.dart

@@ -1,3 +1,4 @@
+import 'package:flutter_localized_locales/flutter_localized_locales.dart';
 import 'package:hiddify/data/data_providers.dart';
 import 'package:hiddify/gen/fonts.gen.dart';
 import 'package:hiddify/gen/translations.g.dart';
@@ -14,7 +15,13 @@ class LocaleNotifier extends _$LocaleNotifier {
     ref.watch(sharedPreferencesProvider),
     "locale",
     AppLocaleUtils.findDeviceLocale(),
-    mapFrom: AppLocale.values.byName,
+    mapFrom: (String value) {
+      // keep backward compatibility with chinese after changing zh to zh_CN
+      if (value == "zh") {
+        return AppLocale.zhCn;
+      }
+      return AppLocale.values.byName(value);
+    },
     mapTo: (value) => value.name,
   );
 
@@ -30,4 +37,9 @@ class LocaleNotifier extends _$LocaleNotifier {
 extension AppLocaleX on AppLocale {
   String get preferredFontFamily =>
       this == AppLocale.fa ? FontFamily.shabnam : "";
+
+  String get localeName =>
+      LocaleNamesLocalizationsDelegate
+          .nativeLocaleNames[flutterLocale.toString()] ??
+      name;
 }

lib/features/common/general_pref_tiles.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_localized_locales/flutter_localized_locales.dart';
 import 'package:go_router/go_router.dart';
 import 'package:hiddify/core/core_providers.dart';
 import 'package:hiddify/core/prefs/prefs.dart';
@@ -17,10 +16,7 @@ class LocalePrefTile extends HookConsumerWidget {
 
     return ListTile(
       title: Text(t.settings.general.locale),
-      subtitle: Text(
-        LocaleNamesLocalizationsDelegate.nativeLocaleNames[locale.name] ??
-            locale.name,
-      ),
+      subtitle: Text(locale.localeName),
       leading: const Icon(Icons.language),
       onTap: () async {
         final selectedLocale = await showDialog<AppLocale>(
@@ -31,11 +27,7 @@ class LocalePrefTile extends HookConsumerWidget {
               children: AppLocale.values
                   .map(
                     (e) => RadioListTile(
-                      title: Text(
-                        LocaleNamesLocalizationsDelegate
-                                .nativeLocaleNames[e.name] ??
-                            e.name,
-                      ),
+                      title: Text(e.localeName),
                       value: e,
                       groupValue: locale,
                       onChanged: (e) => context.pop(e),