feat: add Korean (ko) localization

[nethippo]

변경 사항

• 한국어 로케일 24개 파일 추가 (src/shared/i18n/locales/ko/)
• config.ts에 'ko' 추가
• types.ts에 'ko' 추가
• Settings.tsx 언어 선택 UI에 한국어 옵션 추가
• README-KO.md 추가
• PLAN.md, Test.md, phase1-5.md 진행 기록 추가

테스트 결과

• 타입 체크: 통과
• 테스트: 1002개 통과 (2개 기존 Gateway 테스트 실패, 한국어 현지화와 무관)
• 번역 품질: 자연스러운 한국어 (하십시오체)

[greptile-apps]

Greptile Summary

This PR adds a full Korean (ko) localization with 24 translation files covering every namespace, and wires the locale into types.ts, config.ts, and Settings.tsx. However, src/shared/i18n/index.ts — the central file that imports every locale module and registers it in the i18next resources object — was not updated, so the Korean translations are never loaded and the UI silently falls back to English when "한국어" is selected.

• 24 Korean locale files added under src/shared/i18n/locales/ko/ with complete, natural-sounding translations.
• ko registered in AppLocale type, APP_LOCALES array, and the Settings language-picker display name map.
• src/shared/i18n/index.ts missing the ~25 import statements and the ko: resources block required to make the locale functional; several planning/process documents (PLAN.md, Test.md, phase1-5.md) are committed to the repo root.

Confidence Score: 3/5

Not safe to merge as-is — selecting Korean in the UI will silently display English for every string

The 24 Korean translation files are well-written and complete, and the type/config/UI wiring is correct. But the locale registration step in index.ts was skipped entirely, meaning no Korean string will ever reach the user. Additionally, several planning documents are committed to the repo root.

src/shared/i18n/index.ts needs ~25 import statements and a ko resources block added, matching the pattern used by every other locale

Important Files Changed

Filename	Overview
src/shared/i18n/index.ts	Not updated — missing all Korean imports and the ko resources block, so the new locale is unreachable at runtime
src/shared/i18n/config.ts	Correctly adds ko to the APP_LOCALES array
src/shared/i18n/types.ts	Correctly extends the AppLocale union type with ko
src/renderer/src/screens/Settings/Settings.tsx	Correctly adds 한국어 to the LANGUAGE_NATIVE_NAMES map for display in the UI
src/shared/i18n/locales/ko/constants.ts	Large constants file with all 220+ keys translated into Korean; translation quality looks correct
PLAN.md	Personal planning document that should not be committed to the repository
package-lock.json	Minor peer-dependency metadata shuffle; appears to be an npm version normalisation artifact, not a meaningful dependency change

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[User selects Korean in Settings] --> B[setLocale called with ko]
    B --> C[i18next.changeLanguage ko]
    C --> D{resources ko exists?}
    D -- YES after fix --> E[Korean translations served]
    D -- NO current state --> F[resources ko is undefined]
    F --> G[t falls back to English]
    G --> H[UI displays English strings]

    subgraph Missing from index.ts
        I[import commonKo]
        J[import chatKo]
        K[23 more module imports]
        L[ko resources block registration]
    end

Loading

_{Reviews (1): Last reviewed commit: "feat: add Korean (ko) localization" | Re-trigger Greptile}

[greptile-apps]

Development process files committed to repository

PLAN.md, Test.md, phase1.md–phase5.md appear to be personal planning and progress-tracking documents for this PR. Committing them to the repo root adds noise to the project history and may confuse future contributors. Consider removing them before merging, or moving them out of the repo entirely.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

[nethippo]

yep. my mistake. I will make it removed before merging.