feat(desktop): add Korean (ko) locale

[moduvoice]

Korean (ko) translation PR body template

Motivation

This adds Korean (ko) translation support — to help Korean-speaking users use this
open-source project more comfortably in their own language.

한국 사람들의 오픈소스 이용에 도움이 되게 하기 위해서 한글화 작업을 하였습니다.

Changes

• Added apps/desktop/src/i18n/locales/ko.json — a full Korean translation with 709 leaf keys: all 708 leaf keys from en.json translated 1:1, plus one additional settings.preferences.language.options.ko self-name entry ("한국어"), mirroring how de/es/ja/zh-TW each list all locale display names.
• Registered ko in apps/desktop/src/i18n/shared.ts: added the import, added it to the resources map, and added it to the supportedLocales tuple (which resolveLocale uses generically for both exact and base-language matching, so no other logic changes were needed).
• Added a ko SelectItem to the language switcher in apps/desktop/src/renderer/main/pages/settings/preferences/index.tsx, following the exact same pattern as the existing en/de/es/ja/zh-TW entries.
• Added a single "ko": "한국어" line to the settings.preferences.language.options block in de.json, es.json, ja.json, and zh-TW.json so the language switcher shows the Korean display name consistently in every locale. No other lines in these four files were touched — each of them already has pre-existing translation gaps versus en.json (5 missing keys in de.json; 19 missing keys each in es.json/ja.json/zh-TW.json), which is out of scope for this PR.

Testing

• Wrote a script comparing every leaf key of ko.json against en.json: confirmed all 708 en.json keys are present in ko.json with 0 missing and exactly 1 documented extra key (the ko self-name entry) — 709 total. Confirmed 0 {{placeholder}} interpolation-token mismatches, 0 empty-string values, and 0 value-type mismatches (string vs array) between en.json and ko.json.
• Verified the de/es/ja/zh-TW diffs directly (via git show): each file's diff is exactly one added line ("ko": "한국어"), nothing else changed. Independently confirmed their pre-existing gaps vs. en.json are exactly 5/19/19/19 missing keys respectively (unrelated pre-existing drift, not introduced or fixed by this PR).
• Read apps/desktop/src/i18n/shared.ts and confirmed ko is correctly wired into resources, supportedLocales, and (transitively, since resolveLocale checks supportedLocales generically) locale resolution/fallback.
• Read the language switcher in settings/preferences/index.tsx and confirmed the new ko SelectItem matches the existing pattern exactly.
• Ran pnpm install (with git submodule update --init for the whisper.cpp submodule) and pnpm --filter @amical/types build — both succeeded, including the native whisper.node addon build.
• Ran tsc --noEmit, eslint, and prettier --check on this branch and, for comparison, on a clean worktree of unmodified upstream main:
  • tsc --noEmit: same single pre-existing error on both (missing type declarations for @amical/whisper-wrapper), unrelated to this change.
  • eslint: identical output on both — 270 warnings, 0 errors, byte-for-byte the same warning list.
  • prettier --check: identical set of 26 flagged files on both, including the pre-existing formatting drift in de.json/ja.json/zh-TW.json (present before this PR); ko.json and es.json are prettier-clean.
• Manually spot-checked 100+ of the 709 translated strings (including all domain-specific dictation/transcription/AI-model terminology) for accuracy, natural register, and correct Korean particle usage (e.g. 을/를, 이/가 conditional forms around {{variable}} interpolations) — found consistent, natural, formal-register (합니다체) Korean throughout, with proper nouns (Amical, Whisper, Discord) correctly left untranslated and macOS-convention terms (e.g. "손쉬운 사용" for Accessibility) used where appropriate.

Summary by CodeRabbit

• New Features
  • Added Korean as a selectable app language in Settings.
  • Added Korean translations across the desktop app, including onboarding, menus, settings, notifications, and error messages.
  • Korean language changes follow the existing restart confirmation flow.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ba2542d3-44f3-42cf-adfe-4d6d0e84a55f

📥 Commits

Reviewing files that changed from the base of the PR and between 04aac69 and 183f526.

📒 Files selected for processing (7)

• apps/desktop/src/i18n/locales/de.json
• apps/desktop/src/i18n/locales/es.json
• apps/desktop/src/i18n/locales/ja.json
• apps/desktop/src/i18n/locales/ko.json
• apps/desktop/src/i18n/locales/zh-TW.json
• apps/desktop/src/i18n/shared.ts
• apps/desktop/src/renderer/main/pages/settings/preferences/index.tsx

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📝 Walkthrough

Walkthrough

The desktop app adds a complete Korean translation catalog, registers ko as a supported locale, and adds Korean to the preferences language selector and localized language-option lists.

Changes

Korean locale support

Layer / File(s)	Summary
Korean translation catalog apps/desktop/src/i18n/locales/ko.json	Adds Korean strings across the app shell, onboarding, widget, settings, history, dictation, shortcuts, notes, vocabulary, snippets, and AI Models areas.
Locale registration apps/desktop/src/i18n/shared.ts	Imports the Korean catalog, adds it to resources, and includes ko in supportedLocales and SupportedLocale.
Preferences language selector apps/desktop/src/renderer/main/pages/settings/preferences/index.tsx, apps/desktop/src/i18n/locales/{de,es,ja,zh-TW}.json	Adds Korean to the language dropdown and localized language-option maps.

Estimated code review effort: 2 (Simple) | ~10 minutes

Sequence Diagram(s)

sequenceDiagram
  participant User
  participant PreferencesSettingsPage
  participant i18n
  participant koJson
  User->>PreferencesSettingsPage: Select Korean
  PreferencesSettingsPage->>i18n: Resolve ko locale
  i18n->>koJson: Load Korean translations
  koJson-->>i18n: Return translated strings
  i18n-->>PreferencesSettingsPage: Render Korean UI

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Possibly related PRs

• amicalhq/amical#96: Adds other desktop locales through the same i18n registry and language selector.
• amicalhq/amical#120: Updates the same locale registration and preferences selector flow for Traditional Chinese.

Suggested reviewers: haritabh-z01, amadeus-x1

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: adding Korean locale support to the desktop app.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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