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feat(providers): add Google Gemini TTS provider#1828

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YTLLL:feat/google-gemini-tts-provider-clean
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feat(providers): add Google Gemini TTS provider#1828
YTLLL wants to merge 3 commits into
moeru-ai:mainfrom
YTLLL:feat/google-gemini-tts-provider-clean

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@YTLLL YTLLL commented May 13, 2026 •
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Description

This PR replaces #1824 with a cleaner branch history.

It adds a Google Gemini API text-to-speech provider to AIRI's speech provider list.

Included:

  • Google Gemini TTS provider metadata
  • Static Gemini TTS model list
  • Static Gemini prebuilt voice list
  • API key/base URL validation
  • Gemini generateContent TTS request handling
  • PCM-to-WAV conversion for playback compatibility
  • Related provider/settings layout fixes discovered during review/testing

The settings layout fixes are included here because they affect the same provider settings surface needed to configure and use the new Gemini TTS provider.

Linked Issues

Replaces #1824

Additional Context

Tested with:

  • pnpm lint
  • pnpm typecheck

@YTLLL YTLLL mentioned this pull request May 13, 2026
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github-actions Bot commented May 13, 2026 •
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⏳ Approval required for deploying to Cloudflare Workers (Preview) for stage-web.

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@github-actions github-actions Bot added apps/stage-web Web App: PWA & Browser feature Related to feature scope/audio-output Scope related to audio output (TTS, Voice cloning, etc.) scope/i18n scope/providers Scope related to providers we support labels May 13, 2026
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Code Review

This pull request introduces the Google Gemini Speech provider, adding a new settings UI, store registration, and a core implementation that includes a custom fetch adapter to handle Gemini's text-to-speech API and PCM-to-WAV conversion. The changes also include comprehensive unit tests and locale updates, alongside a minor refactor to standardize CSS classes by replacing 'of-x-auto' with 'overflow-x-auto' across several settings modules. Feedback was provided regarding an inconsistency in base URL normalization where the current logic removes trailing slashes, potentially conflicting with the validator's expectations.

Comment thread packages/stage-ui/src/stores/providers/google-gemini-speech.ts
@claude
fix(providers): ensure Gemini TTS normalizeBaseUrl adds trailing slash
e0504d5 
The previous implementation stripped trailing slashes from the base URL,
inconsistent with the baseUrlValidator (which requires trailing slashes)
and all other providers (openai-compatible-builder, openrouter/audio-speech).
Align normalizeBaseUrl, createAudioFetch, and createSpeechProvider with
the project convention.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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apps/stage-web Web App: PWA & Browser feature Related to feature scope/audio-output Scope related to audio output (TTS, Voice cloning, etc.) scope/i18n scope/providers Scope related to providers we support

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