i18n: register Korean + add Ukrainian translation (#1055)

Korean translation by @ppuassi (#977) — now registered. Ukrainian by @JeffyOLOLO (#902) — lifted onto a clean branch. Both at full en.ts key parity (2258 keys).

client/src/i18n/TranslationContext.tsx

@@ -17,6 +17,8 @@ import br from './translations/br'
 import cs from './translations/cs'
 import pl from './translations/pl'
 import ja from './translations/ja'
+import ko from './translations/ko'
+import uk from './translations/uk'
 import { SUPPORTED_LANGUAGES, SupportedLanguageCode } from './supportedLanguages'
 
 export { SUPPORTED_LANGUAGES }
@@ -25,7 +27,7 @@ type TranslationStrings = Record<string, string | { name: string; category: stri
 
 // Keyed by SupportedLanguageCode so TypeScript enforces all languages have a translation.
 const translations: Record<SupportedLanguageCode, TranslationStrings> = {
-  de, en, es, fr, hu, it, tr, ru, zh, 'zh-TW': zhTw, nl, id, ar, br, cs, pl, ja,
+  de, en, es, fr, hu, it, tr, ru, zh, 'zh-TW': zhTw, nl, id, ar, br, cs, pl, ja, ko, uk,
 }
 
 // Derived from SUPPORTED_LANGUAGES — add new languages there, not here.
@@ -40,7 +42,7 @@ export function getLocaleForLanguage(language: string): string {
 
 export function getIntlLanguage(language: string): string {
   if (language === 'br') return 'pt-BR'
-  return ['de', 'es', 'fr', 'hu', 'it', 'tr', 'ru', 'zh', 'zh-TW', 'nl', 'ar', 'cs', 'pl', 'id', 'ja'].includes(language) ? language : 'en'
+  return ['de', 'es', 'fr', 'hu', 'it', 'tr', 'ru', 'zh', 'zh-TW', 'nl', 'ar', 'cs', 'pl', 'id', 'ja', 'ko', 'uk'].includes(language) ? language : 'en'
 }
 
 export function isRtlLanguage(language: string): boolean {

client/src/i18n/supportedLanguages.ts

@@ -16,6 +16,8 @@ export const SUPPORTED_LANGUAGES = [
   { value: 'ar',    label: 'العربية',              locale: 'ar-SA' },
   { value: 'id',    label: 'Bahasa Indonesia',     locale: 'id-ID' },
   { value: 'ja',    label: '日本語',                locale: 'ja-JP' },
+  { value: 'ko',    label: '한국어',                 locale: 'ko-KR' },
+  { value: 'uk',    label: 'Українська',           locale: 'uk-UA' },
 ] as const
 
 export type SupportedLanguageCode = typeof SUPPORTED_LANGUAGES[number]['value']