feat(i18n): add Traditional Chinese (Taiwan) locale

Add zh-TW as a new supported language, covering all 1500+ translation keys
with Taiwan-standard terminology and phrasing.

Changes:
- src/i18n/locales/zh-TW.json: new file, full Traditional Chinese translation
- src/i18n/index.ts: import and register zh-TW locale
- src/types/common.ts: add 'zh-TW' to Language union type
- src/utils/constants.ts: add zh-TW to LANGUAGE_ORDER and LANGUAGE_LABEL_KEYS
- src/utils/language.ts: add zh-tw/zh-hant browser locale detection
- src/i18n/locales/*.json: add chinese_tw label key to all locales

Co-authored-by: lmanchu <lman.chu@gmail.com>

src/i18n/index.ts

@@ -5,6 +5,7 @@
 import i18n from 'i18next';
 import { initReactI18next } from 'react-i18next';
 import zhCN from './locales/zh-CN.json';
+import zhTW from './locales/zh-TW.json';
 import en from './locales/en.json';
 import ru from './locales/ru.json';
 import { getInitialLanguage } from '@/utils/language';
@@ -12,6 +13,7 @@ import { getInitialLanguage } from '@/utils/language';
 i18n.use(initReactI18next).init({
   resources: {
     'zh-CN': { translation: zhCN },
+    'zh-TW': { translation: zhTW },
     en: { translation: en },
     ru: { translation: ru }
   },

src/i18n/locales/en.json

@@ -1487,6 +1487,7 @@
   "language": {
     "switch": "Language",
     "chinese": "中文",
+    "chinese_tw": "Traditional Chinese (Taiwan)",
     "english": "English",
     "russian": "Русский"
   },

src/i18n/locales/ru.json

@@ -1486,6 +1486,7 @@
   "language": {
     "switch": "Язык",
     "chinese": "中文",
+    "chinese_tw": "繁體中文（台灣）",
     "english": "English",
     "russian": "Русский"
   },

src/i18n/locales/zh-CN.json

@@ -1487,6 +1487,7 @@
   "language": {
     "switch": "语言",
     "chinese": "中文",
+    "chinese_tw": "繁體中文（台灣）",
     "english": "English",
     "russian": "Русский"
   },

src/types/common.ts

@@ -4,7 +4,7 @@
 
 export type Theme = 'light' | 'white' | 'dark' | 'auto';
 
-export type Language = 'zh-CN' | 'en' | 'ru';
+export type Language = 'zh-CN' | 'zh-TW' | 'en' | 'ru';
 
 export type NotificationType = 'info' | 'success' | 'warning' | 'error';
 

src/utils/constants.ts

@@ -40,9 +40,10 @@ export const STORAGE_KEY_SIDEBAR = 'cli-proxy-sidebar-collapsed';
 export const STORAGE_KEY_AUTH_FILES_PAGE_SIZE = 'cli-proxy-auth-files-page-size';
 
 // 语言配置
-export const LANGUAGE_ORDER = defineLanguageOrder(['zh-CN', 'en', 'ru'] as const);
+export const LANGUAGE_ORDER = defineLanguageOrder(['zh-CN', 'zh-TW', 'en', 'ru'] as const);
 export const LANGUAGE_LABEL_KEYS: Record<Language, string> = {
   'zh-CN': 'language.chinese',
+  'zh-TW': 'language.chinese_tw',
   en: 'language.english',
   ru: 'language.russian'
 };

src/utils/language.ts

@@ -40,6 +40,7 @@ const getBrowserLanguage = (): Language => {
   }
   const raw = navigator.languages?.[0] || navigator.language || 'zh-CN';
   const lower = raw.toLowerCase();
+  if (lower.startsWith('zh-tw') || lower.startsWith('zh-hant')) return 'zh-TW';
   if (lower.startsWith('zh')) return 'zh-CN';
   if (lower.startsWith('ru')) return 'ru';
   return 'en';