feat(translation): add post-ASR translation mode for cloud engine
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).
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// TranslationChip.swift
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// OSGKeyboard · Keyboard Extension
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//
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// Compact chip rendered to the right of `LocaleChip` on the keyboard
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// top bar. Doubles as both the on/off switch and the target-language
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// picker — same Menu pattern as `LocaleChip` so muscle memory transfers.
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//
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// Visual states:
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// • disabled → dim outline, "翻译" label
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// • enabled + cloud → accent fill, "→ EN" / "→ 日本語" style label
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// • enabled + local engine→ warning fill + "翻译需云端" hint (effectively
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// inert; the pipeline rejects the mode and the controller surfaces
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// the error toast)
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//
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// Stays in the same visual family as `CloudEngineChip` / `LocaleChip`
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// (Capsule + 26 pt min height + 5 pt vertical padding) so the top bar
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// doesn't grow when translation is enabled.
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import SwiftUI
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import OSGKeyboardShared
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struct TranslationChip: View {
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@Environment(\.themePalette) private var palette: ThemePalette
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@ObservedObject var state: KeyboardViewController.State
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var body: some View {
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Menu {
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// Toggle entry sits at the top so the user can flip the feature
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// without picking a language first.
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Button {
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state.setTranslationEnabled(!state.translationEnabled)
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} label: {
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if state.translationEnabled {
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Label(ExtL10n.string("keyboard.translation.disable"), systemImage: "checkmark")
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} else {
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Text(ExtL10n.string("keyboard.translation.enable"))
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}
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}
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if state.translationEnabled {
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Divider()
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ForEach(TranslationLanguageCatalog.all) { language in
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Button {
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state.setTranslationTargetLocaleId(language.id)
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} label: {
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if language.id == state.translationTargetLocaleId {
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Label(language.nativeName, systemImage: "checkmark")
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} else {
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Text(language.nativeName)
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}
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}
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}
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}
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} label: {
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label
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}
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.menuStyle(.button)
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.accessibilityLabel(ExtL10n.text("keyboard.translation.a11y"))
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.accessibilityHint(ExtL10n.text("keyboard.translation.a11yHint"))
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}
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@ViewBuilder
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private var label: some View {
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let target = TranslationLanguageCatalog.resolve(state.translationTargetLocaleId)
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let isLocal = state.isLocalEngine
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let enabled = state.translationEnabled
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HStack(spacing: 4) {
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Image(systemName: enabled ? "character.bubble" : "character.bubble.fill")
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Text(chipLabel(target: target, enabled: enabled, isLocal: isLocal))
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Image(systemName: "chevron.down")
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.font(.system(size: 8, weight: .bold))
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}
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.font(TypeStyle.caption2)
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.foregroundStyle(foreground(enabled: enabled, isLocal: isLocal))
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.padding(.horizontal, Spacing.xs + 2)
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.padding(.vertical, 5)
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.frame(minHeight: 26)
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.background(background(enabled: enabled, isLocal: isLocal), in: Capsule())
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.overlay(Capsule().stroke(stroke(enabled: enabled, isLocal: isLocal), lineWidth: 0.5))
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}
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private func chipLabel(target: TranslationLanguage, enabled: Bool, isLocal: Bool) -> String {
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// Local-engine + on shows the constraint hint instead of the
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// target label so the user knows why nothing's happening.
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if enabled, isLocal {
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return ExtL10n.string("keyboard.translation.needsCloudShort")
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}
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if !enabled {
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return ExtL10n.string("keyboard.translation.off")
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}
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// Short form: "→EN" / "→日" style. Falls back to the prompt
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// language name for languages without a chip-style abbreviation
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// (e.g. French → "FR" via the 2-letter prefix).
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let short = shortLabel(for: target)
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return "→\(short)"
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}
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private func shortLabel(for target: TranslationLanguage) -> String {
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switch target.id {
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case "en": return "EN"
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case "zh-Hans": return "中"
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case "zh-Hant": return "繁"
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case "ja": return "日"
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case "ko": return "韩"
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case "fr": return "FR"
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case "de": return "DE"
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case "es": return "ES"
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case "ru": return "RU"
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case "pt": return "PT"
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default: return target.promptLanguageName
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}
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}
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private func foreground(enabled: Bool, isLocal: Bool) -> Color {
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if enabled, isLocal { return palette.warning }
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if enabled { return palette.accent }
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return palette.textPrimary
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}
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private func background(enabled: Bool, isLocal: Bool) -> Color {
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if enabled, isLocal { return palette.warning.opacity(0.15) }
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if enabled { return palette.accent.opacity(0.15) }
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return palette.surfaceElevated
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}
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private func stroke(enabled: Bool, isLocal: Bool) -> Color {
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if enabled, isLocal { return palette.warning.opacity(0.35) }
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if enabled { return palette.accent.opacity(0.35) }
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return palette.divider
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}
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}
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