Add language selection for Whisper models

[wallneradam]

Description

Adds a searchable language selector to every Whisper model in Voice Engine settings. Users can keep automatic language detection or force one of Whisper's 99 supported languages.

The selected language is persisted, included in settings backups, and passed to RunOptions.language for transcription. Existing installations initially inherit the language selected during onboarding until the user explicitly chooses Automatic or another language.

This improves short utterances and single-word dictation, where Whisper may not have enough context to reliably detect the spoken language.

Type of Change

• 🐞 Bug fix
• ✨ New feature
• 💥 Breaking change
• 🧹 Chore
• 📝 Documentation update

Related Issue or Discussion

Revisits #100. The earlier concern about exposing a Whisper-only setting is less applicable now that Voice Engine settings already provide model-specific language selection for Cohere and Nemotron.

Testing

• Tested on Intel Mac
• Tested on Apple Silicon Mac
• Tested on macOS version: 26.5.2
• Ran linter locally: swiftlint --strict --config .swiftlint.yml Sources (0 violations)
• Ran formatter locally: swiftformat --config .swiftformat Sources (the current base branch has pre-existing whole-file formatting failures in SettingsStore.swift and WhisperProvider.swift; unrelated lines were not reformatted)
• Ran tests locally: 152 tests passed with 0 failures
• Built the signed Debug application successfully
• Manually tested selecting Hungarian, searching the language list, and Hungarian dictation in the installed application

Screenshots / Video

• No UI/visual changes; screenshots/video are not applicable.

Notes

• Uses the existing VoiceEngineLanguageCatalog; no duplicate language list or dependency update is introduced.
• Automatic detection remains available and preserves the previous behavior.
• Onboarding Whisper routes now apply their existing language binding instead of discarding it.

[chatgpt-codex-connector]

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[greptile-apps]

Greptile Summary

This PR adds a searchable language selector to Whisper model rows in Voice Engine settings, letting users force a specific language or keep automatic detection. The selected language is persisted in UserDefaults, included in backups, and forwarded to RunOptions.language at transcription time.

• selectedWhisperLanguageCode getter falls back to the onboarding language for existing installs that have no stored value, while the backup restore correctly uses if let so pre-feature backups leave that fallback intact.
• The Hebrew language code is corrected from "iw" to "he" throughout the catalog and the supported-code set to match the ISO 639-1 code current Whisper models accept.
• apply() now writes selectedWhisperLanguageCode for .whisper route bindings instead of silently discarding them, so onboarding language selection is no longer lost when the user lands on a Whisper model.

Confidence Score: 5/5

Safe to merge; the change is well-scoped and all edge cases (pre-feature backups, existing onboarding installs, invalid stored codes) are handled gracefully.

The core persistence, backup-restore, and transcription paths are all correct. The only finding is that the Automatic option lives inside the scroll view and can scroll out of view — search recovers it, but pinning it would be friendlier. Nothing here would cause data loss or incorrect transcription behavior.

AISettingsView+SpeechRecognition.swift — the Automatic option placement in the scrollable language list.

_{Reviews (3): Last reviewed commit: "Preserve automatic language in settings ..." | Re-trigger Greptile}

[chatgpt-codex-connector]

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Reviewed commit: a0546b8b82

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