chore: App Store metadata update (ASO)

[2sem]

Zero-code update to App Store Connect. Can be done immediately without an app release.

Subtitle (30 chars): Voice & Text Translator

Keywords (100 chars): face to face,korean translator,travel,speech,papago,japanese,chinese,offline,language

Current screenshot plan (recommended order):

1. Landscape full translated text — caption: Full-screen translation display
   • Purpose: immediate value / hero screenshot
   • Content: landscape mode with only the large translated result visible, using a short practical travel phrase
2. Voice input — caption: Speak naturally, translate instantly
   • Purpose: show low-friction input
   • Content: speech recognition screen with recognized speech visible and active recording state
3. Language selection — caption: 13 languages, zero barriers
   • Purpose: show language coverage
   • Content: language picker with a strong mix of visible languages/flags
4. History — caption: Your translations, ready anytime
   • Purpose: show retention and reuse
   • Content: history list with realistic source/translated pairs, dates/times, and ideally one favorite visible
5. Conversation Mode (after feat: Conversation Mode — real-time two-way translation #71 ships) — caption: Have a real conversation, in any language
   • Deferred until 2.3.0 / feat: Conversation Mode — real-time two-way translation #71

Localized descriptions: add ja, zh-Hans, zh-Hant-TW, de, es, fr in App Store Connect

Note:

• Screenshots 1–4 can be updated from currently shipped product surfaces.
• Screenshot 5 depends on feat: Conversation Mode — real-time two-way translation #71.
• Screenshot reorder still needs manual execution in App Store Connect.
• History screenshot asset quality should be manually verified before upload.

[2sem]

Applied the repo-managed App Store metadata quick wins for 2.2.1 via fastlane metadata files. Added subtitle, keywords, and description files for: en-US, ko, de-DE, es-ES, fr-FR, ja, zh-Hans, zh-Hant.\n\nIncluded in repo:\n- subtitle: Voice & Text Translator\n- keywords: face to face,korean translator,travel,speech,papago,japanese,chinese,offline,language\n- concise localized descriptions aligned with TalkTrans value props (voice + text translation, face-to-face travel use, history, 500 characters)\n\nStill deferred / manual:\n- screenshot reorder is not encoded in fastlane metadata here\n- Conversation Mode screenshot remains blocked on #71 / 2.3.0\n- History screenshot asset quality still needs manual verification before upload