deddb49d56
Adds an opt-in translation pipeline that reuses the existing PolishingService + LLMClient + AppGroupStore chain. Translation is implemented as a new PolishMode (.translate(targetLocaleId:)); all existing call sites are unchanged. Settings: - New TranslationPickerRow in the language tab (Toggle + 10-locale picker: en/zh-Hans/zh-Hant/ja/ko/fr/de/es/ru/pt), persisted to the App Group so the keyboard extension can read it during live dictation. - 5 new strings per language (en + zh-Hans). Keyboard: - New TranslationChip on the top bar to the right of LocaleChip; same Menu pattern, lets users toggle or quickly switch target language without leaving the keyboard. - PolishingService dispatches .translate with a parameterised prompt (en/zh variants selected by provider id); PolishingService.error gains a translationNotAvailable case so local-engine users get a clear inline warning when the toggle is on but cloud is off. - 6 new strings per language (en + zh-Hans) for the chip + banner. Local engine policy: - Translation is cloud-only by design (local engine stays ASR-only to honour the no-roundtrip promise). Chip shows a 'cloud required' state and raw transcript still inserts on failure — no data loss. Build: - OSGKeyboardShared adds TranslationLanguage enum (10 locales) and TranslationPrompt factory. - 4 new files, 9 modified. xcodebuild scheme=OSGKeyboard config=Debug destination=iPhone 17 Simulator: BUILD SUCCEEDED (0 warning, 0 error). Also pins DEVELOPMENT_TEAM in project.yml for TestFlight uploads (3 targets; Team X329MZU23S).