feat: add Korean locale core support

.changeset/ko-locale-core.md

@@ -0,0 +1,6 @@
+---
+"@open-codesign/desktop": patch
+"@open-codesign/i18n": patch
+---
+
+Feat: add Korean locale core support across the shared i18n runtime and desktop language selection UI.

apps/desktop/src/renderer/src/components/LanguageToggle.tsx

@@ -6,7 +6,7 @@ import { useEffect, useState } from 'react';
 
 const noDragStyle = { WebkitAppRegion: 'no-drag' } as CSSProperties;
 
-const LOCALE_CYCLE: Locale[] = ['en', 'zh-CN', 'pt-BR'];
+const LOCALE_CYCLE: Locale[] = ['en', 'zh-CN', 'pt-BR', 'ko'];
 
 function nextLocale(locale: Locale): Locale {
   const i = LOCALE_CYCLE.indexOf(locale);
@@ -16,6 +16,7 @@ function nextLocale(locale: Locale): Locale {
 function localeLabel(locale: Locale): string {
   if (locale === 'zh-CN') return 'ZH';
   if (locale === 'pt-BR') return 'PT';
+  if (locale === 'ko') return 'KO';
   return 'EN';
 }
 

apps/desktop/src/renderer/src/components/Settings.tsx

@@ -2155,6 +2155,7 @@ function AppearanceTab() {
               { value: 'en', label: t('settings.appearance.langEn') },
               { value: 'zh-CN', label: t('settings.appearance.langZhCN') },
               { value: 'pt-BR', label: t('settings.appearance.langPtBR') },
+              { value: 'ko', label: t('settings.appearance.langKo') },
             ]}
           />
         </Row>

packages/i18n/package.json

@@ -8,7 +8,9 @@
   "exports": {
     ".": "./src/index.ts",
     "./locales/en": "./src/locales/en.json",
-    "./locales/zh-CN": "./src/locales/zh-CN.json"
+    "./locales/zh-CN": "./src/locales/zh-CN.json",
+    "./locales/pt-BR": "./src/locales/pt-BR.json",
+    "./locales/ko": "./src/locales/ko.json"
   },
   "scripts": {
     "typecheck": "tsc --noEmit",

packages/i18n/src/i18n.test.ts

@@ -12,6 +12,7 @@ describe('normalizeLocale', () => {
   it('returns the value unchanged when it is supported', () => {
     expect(normalizeLocale('en')).toBe('en');
     expect(normalizeLocale('zh-CN')).toBe('zh-CN');
+    expect(normalizeLocale('ko')).toBe('ko');
   });
 
   it('coalesces common Chinese variants to zh-CN', () => {
@@ -26,6 +27,11 @@ describe('normalizeLocale', () => {
     expect(normalizeLocale('en-GB')).toBe('en');
   });
 
+  it('maps Korean variants to ko', () => {
+    expect(normalizeLocale('ko-KR')).toBe('ko');
+    expect(normalizeLocale('ko_kr')).toBe('ko');
+  });
+
   it('falls back to en for unsupported locales and warns', () => {
     const warn = vi.spyOn(console, 'warn').mockImplementation(() => {});
     expect(normalizeLocale('fr-FR')).toBe('en');
@@ -62,6 +68,10 @@ describe('initI18n + setLocale (live switching)', () => {
     expect(i18n.t('chat.placeholder')).toBe('想设计什么？');
     expect(i18n.t('common.preAlpha')).toBe('预览版');
 
+    await setLocale('ko');
+    expect(i18n.t('chat.placeholder')).toBe('무엇을 디자인할지 설명하세요…');
+    expect(i18n.t('common.preAlpha')).toBe('프리 알파');
+
     await setLocale('en');
     expect(i18n.t('common.send')).toBe('Send');
   });
@@ -87,6 +97,10 @@ describe('initI18n + setLocale (live switching)', () => {
     expect(getCurrentLocale()).toBe('zh-CN');
     expect(i18n.t('common.send')).toBe('发送');
 
+    await setLocale('ko');
+    expect(getCurrentLocale()).toBe('ko');
+    expect(i18n.t('common.send')).toBe('보내기');
+
     await setLocale('en');
     expect(getCurrentLocale()).toBe('en');
     expect(i18n.t('common.send')).toBe('Send');
@@ -117,6 +131,29 @@ describe('onboarding i18n keys (Welcome / PasteKey / ChooseModel)', () => {
     expect(i18n.t('onboarding.choose.back')).toBe('Back');
   });
 
+  it('switches all onboarding strings to Korean when locale is ko', async () => {
+    const { i18n } = await import('./index');
+    await initI18n('en');
+    await setLocale('ko');
+
+    expect(i18n.t('onboarding.welcome.title')).toBe('어떤 모델로든 디자인하세요.');
+    expect(i18n.t('onboarding.welcome.tryFree')).toBe('무료로 시작하기');
+    expect(i18n.t('onboarding.welcome.useKey')).toBe('내 API 키 사용');
+    expect(i18n.t('onboarding.welcome.whereToGetKey')).toBe('키를 받는 방법');
+
+    expect(i18n.t('onboarding.paste.title')).toBe('API 키 붙여넣기');
+    expect(i18n.t('onboarding.paste.back')).toBe('뒤로');
+    expect(i18n.t('onboarding.paste.continue')).toBe('계속');
+    expect(i18n.t('onboarding.paste.connectionTest.button')).toBe('테스트');
+    expect(i18n.t('onboarding.paste.connectionTest.ok')).toBe('연결됨');
+
+    expect(i18n.t('onboarding.choose.title')).toBe('기본 모델 선택');
+    expect(i18n.t('onboarding.choose.finish')).toBe('완료');
+    expect(i18n.t('onboarding.choose.back')).toBe('뒤로');
+
+    await setLocale('en');
+  });
+
   it('switches all onboarding strings to Chinese when locale is zh-CN', async () => {
     const { i18n } = await import('./index');
     await initI18n('en');

packages/i18n/src/index.ts

@@ -16,10 +16,11 @@ import i18next from 'i18next';
 import { useCallback } from 'react';
 import { initReactI18next, useTranslation } from 'react-i18next';
 import en from './locales/en.json';
+import ko from './locales/ko.json';
 import ptBR from './locales/pt-BR.json';
 import zhCN from './locales/zh-CN.json';
 
-export const availableLocales = ['en', 'zh-CN', 'pt-BR'] as const;
+export const availableLocales = ['en', 'zh-CN', 'pt-BR', 'ko'] as const;
 export type Locale = (typeof availableLocales)[number];
 
 const DEFAULT_LOCALE: Locale = 'en';
@@ -28,6 +29,7 @@ const resources = {
   en: { translation: en },
   'zh-CN': { translation: zhCN },
   'pt-BR': { translation: ptBR },
+  ko: { translation: ko },
 } as const;
 
 export function isSupportedLocale(value: string | undefined | null): value is Locale {
@@ -45,6 +47,9 @@ export function normalizeLocale(value: string | undefined | null): Locale {
   if (lower === 'pt-br' || lower === 'pt_br' || lower === 'pt' || lower.startsWith('pt-')) {
     return 'pt-BR';
   }
+  if (lower === 'ko' || lower === 'ko-kr' || lower === 'ko_kr' || lower.startsWith('ko-')) {
+    return 'ko';
+  }
   if (lower.startsWith('en')) return 'en';
   console.warn(
     `[i18n] unsupported locale "${value}", falling back to "${DEFAULT_LOCALE}". ` +

packages/i18n/src/locales/en.json

@@ -397,7 +397,8 @@
       "languageLoadFailed": "Failed to load language",
       "langEn": "English",
       "langZhCN": "中文 (简体)",
-      "langPtBR": "Português (BR)"
+      "langPtBR": "Português (BR)",
+      "langKo": "한국어"
     },
     "language": {
       "label": "Language",