feat(locales): support runtime dynamic language list (#8279)

* feat(locales): support runtime dynamic language list

- 将 SupportedLanguagesType 从硬编码的 'en-US' | 'zh-CN' 联合类型放宽为 string，支持应用在运行时注册自定义语言

- @vben/constants 新增 setSupportLanguages / onSupportLanguagesChange / getSupportLanguages，以发布订阅方式动态管理语言列表（订阅时立即回调当前值）

- language-toggle 与 user-dropdown 组件改为订阅动态列表，不再直接引入静态 SUPPORT_LANGUAGES

- use-simple-locale 对未知语言回退到 en-US

- vxe-table 集成对未打包的自定义语言回退到 en-US 语言包

向后兼容：不调用 setSupportLanguages 时，行为与之前完全一致。

* fix(constants): 语言列表注册表返回独立快照

getSupportLanguages 与监听器回调改为返回克隆快照，存储时也做克隆，避免外部直接修改数组或元素对象污染注册表内部状态、绕过 setSupportLanguages 导致其他订阅者不同步。

* fix(constants): 偏好设置面板语言列表改为订阅动态注册表

- general.vue 不再直接引入静态 SUPPORT_LANGUAGES，改为通过 onSupportLanguagesChange 订阅，运行时替换语言列表后设置面板同步刷新

- setSupportLanguages 通知时迭代监听器快照，避免监听器在回调中取消订阅导致跳过后续监听器

* fix(constants): 固化本次更新快照后再通知监听器

监听器回调中嵌套调用 setSupportLanguages 时，后续监听器仍收到本次更新的列表，而不是嵌套调用的新列表。

packages/@core/composables/src/use-simple-locale/messages.ts

@@ -1,6 +1,6 @@
-export type Locale = 'en-US' | 'zh-CN';
+export type Locale = string;
 
-export const messages: Record<Locale, Record<string, string>> = {
+export const messages: Record<string, Record<string, string>> = {
   'en-US': {
     cancel: 'Cancel',
     collapse: 'Collapse',
@@ -25,4 +25,5 @@ export const messages: Record<Locale, Record<string, string>> = {
   },
 };
 
-export const getMessages = (locale: Locale) => messages[locale];
+export const getMessages = (locale: Locale) =>
+  messages[locale] ?? messages['en-US'] ?? {};

packages/@core/preferences/src/types.ts

@@ -16,7 +16,7 @@ import type {
   ThemeModeType,
 } from '@vben-core/typings';
 
-type SupportedLanguagesType = 'en-US' | 'zh-CN';
+type SupportedLanguagesType = string;
 type CustomPreferencesValue = boolean | number | string;
 
 interface CustomPreferencesOption<TValue extends string = string> {

packages/constants/src/core.ts

@@ -5,11 +5,11 @@ export const LOGIN_PATH = '/auth/login';
 
 export interface LanguageOption {
   label: string;
-  value: 'en-US' | 'zh-CN';
+  value: string;
 }
 
 /**
- * Supported languages
+ * 支持的语言（默认值，可在运行时通过 setSupportLanguages 覆盖）
  */
 export const SUPPORT_LANGUAGES: LanguageOption[] = [
   {
@@ -21,3 +21,49 @@ export const SUPPORT_LANGUAGES: LanguageOption[] = [
     value: 'en-US',
   },
 ];
+
+// --- 动态语言列表管理 ---
+type LanguageListListener = (languages: LanguageOption[]) => void;
+
+// 深拷贝语言列表，外部拿到的永远是独立快照，
+// 避免绕过 setSupportLanguages 直接修改注册表内部状态
+function cloneLanguages(languages: LanguageOption[]): LanguageOption[] {
+  return languages.map((language) => ({ ...language }));
+}
+
+let currentLanguages: LanguageOption[] = cloneLanguages(SUPPORT_LANGUAGES);
+const listeners: LanguageListListener[] = [];
+
+/**
+ * 获取当前动态语言列表
+ */
+export function getSupportLanguages(): LanguageOption[] {
+  return cloneLanguages(currentLanguages);
+}
+
+/**
+ * 更新语言列表并通知所有监听器
+ */
+export function setSupportLanguages(languages: LanguageOption[]) {
+  // 先固化本次快照，即使监听器回调中嵌套调用 setSupportLanguages，
+  // 后续监听器收到的仍是本次更新的列表
+  const nextLanguages = cloneLanguages(languages);
+  currentLanguages = nextLanguages;
+  // 迭代监听器快照，避免监听器在回调中取消订阅导致跳过后续监听器
+  for (const listener of listeners.slice()) {
+    listener(cloneLanguages(nextLanguages));
+  }
+}
+
+/**
+ * 订阅语言列表变化，返回取消订阅函数
+ */
+export function onSupportLanguagesChange(listener: LanguageListListener) {
+  listeners.push(listener);
+  // 订阅时立即回调当前值，便于消费方初始化
+  listener(cloneLanguages(currentLanguages));
+  return () => {
+    const index = listeners.indexOf(listener);
+    if (index !== -1) listeners.splice(index, 1);
+  };
+}

packages/effects/layouts/src/widgets/language-toggle.vue

@@ -1,7 +1,10 @@
 <script setup lang="ts">
+import type { LanguageOption } from '@vben/constants';
 import type { SupportedLanguagesType } from '@vben/locales';
 
-import { SUPPORT_LANGUAGES } from '@vben/constants';
+import { onUnmounted, ref } from 'vue';
+
+import { onSupportLanguagesChange } from '@vben/constants';
 import { Languages } from '@vben/icons';
 import { loadLocaleMessages } from '@vben/locales';
 import { preferences, updatePreferences } from '@vben/preferences';
@@ -12,6 +15,12 @@ defineOptions({
   name: 'LanguageToggle',
 });
 
+const languageList = ref<LanguageOption[]>([]);
+const unsubscribe = onSupportLanguagesChange((langs) => {
+  languageList.value = [...langs];
+});
+onUnmounted(unsubscribe);
+
 async function handleUpdate(value: string | undefined) {
   if (!value) return;
   const locale = value as SupportedLanguagesType;
@@ -27,7 +36,7 @@ async function handleUpdate(value: string | undefined) {
 <template>
   <div>
     <VbenDropdownRadioMenu
-      :menus="SUPPORT_LANGUAGES"
+      :menus="languageList"
       :model-value="preferences.app.locale"
       @update:model-value="handleUpdate"
     >

packages/effects/layouts/src/widgets/preferences/blocks/general/general.vue

@@ -1,7 +1,9 @@
 <script setup lang="ts">
-import { onMounted, ref, unref } from 'vue';
+import type { LanguageOption } from '@vben/constants';
 
-import { SUPPORT_LANGUAGES } from '@vben/constants';
+import { onMounted, onUnmounted, ref, unref } from 'vue';
+
+import { onSupportLanguagesChange } from '@vben/constants';
 import { $t } from '@vben/locales';
 import { useTimezoneStore } from '@vben/stores';
 
@@ -24,6 +26,12 @@ const appEnableCopyPreferences = defineModel<boolean>(
 );
 const timezoneStore = useTimezoneStore();
 
+const languageList = ref<LanguageOption[]>([]);
+const unsubscribe = onSupportLanguagesChange((langs) => {
+  languageList.value = [...langs];
+});
+onUnmounted(unsubscribe);
+
 const timezoneOptionsRef = ref<
   {
     label: string;
@@ -42,7 +50,7 @@ onMounted(async () => {
 </script>
 
 <template>
-  <SelectItem v-model="appLocale" :items="SUPPORT_LANGUAGES">
+  <SelectItem v-model="appLocale" :items="languageList">
     {{ $t('preferences.language') }}
   </SelectItem>
   <SelectItem v-model="appTimezone" :items="timezoneOptionsRef">

packages/effects/layouts/src/widgets/user-dropdown/user-dropdown.vue

@@ -1,11 +1,12 @@
 <script setup lang="ts">
 import type { Component } from 'vue';
 
+import type { LanguageOption } from '@vben/constants';
 import type { AnyFunction } from '@vben/types';
 
-import { computed, ref, useTemplateRef, watch } from 'vue';
+import { computed, onUnmounted, ref, useTemplateRef, watch } from 'vue';
 
-import { SUPPORT_LANGUAGES } from '@vben/constants';
+import { onSupportLanguagesChange } from '@vben/constants';
 import { useHoverToggle, useRefresh } from '@vben/hooks';
 import {
   createIconifyIcon,
@@ -278,11 +279,16 @@ function handleNotificationSelect(event?: Event) {
 
 // 语言切换 - 阻止 Radix 默认关闭外层 dropdown，就地展开/收起 locale 列表
 const showLanguageList = ref(false);
+const languageList = ref<LanguageOption[]>([]);
+const unsubLang = onSupportLanguagesChange((langs) => {
+  languageList.value = [...langs];
+});
+onUnmounted(unsubLang);
 function handleLanguageToggleSelect(event?: Event) {
   event?.preventDefault();
   showLanguageList.value = !showLanguageList.value;
 }
-async function handleLocaleChange(event: Event, value: 'en-US' | 'zh-CN') {
+async function handleLocaleChange(event: Event, value: string) {
   // 阻止默认关闭，让用户能继续看到选择结果；选完手动收起
   event.preventDefault();
   updatePreferences({ app: { locale: value } });
@@ -480,7 +486,7 @@ if (preferences.shortcutKeys.enable) {
           </DropdownMenuItem>
           <template v-if="showLanguageList">
             <DropdownMenuItem
-              v-for="lang in SUPPORT_LANGUAGES"
+              v-for="lang in languageList"
               :key="lang.value"
               class="mx-1 flex cursor-pointer items-center rounded-sm py-1 pl-8 leading-8"
               @select="(e: Event) => handleLocaleChange(e, lang.value)"

packages/effects/plugins/src/vxe-table/init.ts

@@ -119,7 +119,7 @@ export function setupVbenVxeTable(setupOptions: SetupVxeTable) {
   }
   const { isDark, locale } = usePreferences();
 
-  const localMap = {
+  const localMap: Record<string, any> = {
     'zh-CN': normalizeVxeLocale(zhCN),
     'en-US': normalizeVxeLocale(enUS),
   };
@@ -128,8 +128,13 @@ export function setupVbenVxeTable(setupOptions: SetupVxeTable) {
     [() => isDark.value, () => locale.value],
     ([isDarkValue, localeValue]) => {
       VxeUI.setTheme(isDarkValue ? 'dark' : 'light');
-      VxeUI.setI18n(localeValue, localMap[localeValue]);
-      VxeUI.setLanguage(localeValue);
+      // 应用语言是运行时字符串（见 SupportedLanguagesType）；vxe-table 只为内置
+      // 语言提供类型定义，因此这里需要断言，未打包的自定义语言回退到 en-US
+      VxeUI.setI18n(
+        localeValue as any,
+        localMap[localeValue] ?? localMap['en-US'],
+      );
+      VxeUI.setLanguage(localeValue as any);
     },
     {
       immediate: true,

packages/locales/src/typing.ts

@@ -1,4 +1,4 @@
-export type SupportedLanguagesType = 'en-US' | 'zh-CN';
+export type SupportedLanguagesType = string;
 
 export type ImportLocaleFn = () => Promise<{ default: Record<string, string> }>;