修复识别系统默认语言

back/shared/i18n.ts

@@ -1,3 +1,5 @@
+import { shareStore } from './store';
+
 const messages: Record<string, Record<string, string>> = {
   zh: {},
   en: {
@@ -148,10 +150,13 @@ let currentLang: string = 'zh';
 
 export function setLang(lang: string) {
   currentLang = lang || 'zh';
+  shareStore.setLang(currentLang);
 }
 
-export function getLang(): string {
-  return currentLang;
+/** 系统默认语言：Intl 检测 → 'zh'（仅返回 zh/en） */
+export function systemLang(): string {
+  const prefix = Intl.DateTimeFormat().resolvedOptions().locale.split('-')[0];
+  return prefix === 'en' ? 'en' : 'zh';
 }
 
 export function t(key: string, lang?: string): string {

back/shared/store.ts

@@ -8,11 +8,13 @@ import path from 'path';
 export enum EKeyv {
   'apps' = 'apps',
   'authInfo' = 'authInfo',
+  'lang' = 'lang',
 }
 
 export interface IKeyvStore {
   apps: App[];
   authInfo: AuthInfo;
+  lang: string;
 }
 
 const keyvSqlite = new KeyvSqlite(path.join(config.dbPath, 'keyv.sqlite'));
@@ -31,4 +33,10 @@ export const shareStore = {
   updateApps(apps: App[]) {
     return keyvStore.set<IKeyvStore['apps']>(EKeyv.apps, apps);
   },
+  getLang() {
+    return keyvStore.get<IKeyvStore['lang']>(EKeyv.lang);
+  },
+  setLang(value: IKeyvStore['lang']) {
+    return keyvStore.set<IKeyvStore['lang']>(EKeyv.lang, value);
+  },
 };