rel 1.0

src/i18n/locales.ts

@@ -0,0 +1,31 @@
+export type Lang = 'zh' | 'en' | 'ja' | 'fr';
+
+export const LANGS: Lang[] = ['zh', 'en', 'ja', 'fr'];
+
+export const DEFAULT_LANG: Lang = 'zh';
+
+export const htmlLang: Record<Lang, string> = {
+  zh: 'zh-CN',
+  en: 'en',
+  ja: 'ja',
+  fr: 'fr',
+};
+
+export const langLabels: Record<Lang, string> = {
+  zh: '中文',
+  en: 'English',
+  ja: '日本語',
+  fr: 'Français',
+};
+
+export function isLang(value: string | undefined): value is Lang {
+  return value !== undefined && (LANGS as string[]).includes(value);
+}
+
+/** 站内路径（不含语言前缀），首页为空字符串 */
+export type RouteKey = '' | 'teaching-philosophy' | 'curriculum' | 'faculty' | 'about';
+
+export function hrefFor(lang: Lang, segment: RouteKey): string {
+  if (!segment) return `/${lang}`;
+  return `/${lang}/${segment}`;
+}