feat(i18n): add backend multi-language support with user language preference

- Add go-i18n library for internationalization
- Create i18n package with translation keys and YAML locale files (zh/en)
- Implement i18n middleware for language detection from user settings and Accept-Language header
- Add Language field to UserSetting DTO
- Update API response helpers with i18n support (ApiErrorI18n, ApiSuccessI18n)
- Migrate hardcoded messages in token, redemption, and user controllers
- Add frontend language preference settings component
- Sync language preference across header selector and user settings
- Auto-restore user language preference on login
This commit is contained in:
CaIon
2026-02-05 00:07:54 +08:00
parent ded79c7684
commit f60fce6584
20 changed files with 1393 additions and 317 deletions

View File

@@ -62,4 +62,7 @@ const (
// ContextKeyAdminRejectReason stores an admin-only reject/block reason extracted from upstream responses.
// It is not returned to end users, but can be persisted into consume/error logs for debugging.
ContextKeyAdminRejectReason ContextKey = "admin_reject_reason"
// ContextKeyLanguage stores the user's language preference for i18n
ContextKeyLanguage ContextKey = "language"
)