Internationalization

admin-next LanguageProvider——向后兼容的 next-intl 桥接层

A deep dive into the admin-next LanguageProvider — a backward-compatible shim that bridges next-intl with the legacy codebase. Covers the useLanguage hook, setLocale with cookie-based persistence, the getLocalizedValue utility, and migration strategy from custom i18n to next-intl.