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fce6c3cdf6
Adds Google Gemini TTS as the seventh voice provider, with 30 prebuilt voices (Zephyr, Puck, Kore, Enceladus, Gacrux, etc.) and natural-language prompt control. Integrates through the existing provider chain: - tools/tts_tool.py: new _generate_gemini_tts() calls the generativelanguage REST endpoint with responseModalities=[AUDIO], wraps the returned 24kHz mono 16-bit PCM (L16) in a WAV RIFF header, then ffmpeg-converts to MP3 or Opus depending on output extension. For .ogg output, libopus is forced explicitly so Telegram voice bubbles get Opus (ffmpeg defaults to Vorbis for .ogg). - hermes_cli/tools_config.py: exposes 'Google Gemini TTS' as a provider option in the curses-based 'hermes tools' UI. - hermes_cli/setup.py: adds gemini to the setup wizard picker, tool status display, and API key prompt branch (accepts existing GEMINI_API_KEY or GOOGLE_API_KEY, falls back to Edge if neither set). - tests/tools/test_tts_gemini.py: 15 unit tests covering WAV header wrap correctness, env var fallback (GEMINI/GOOGLE), voice/model overrides, snake_case vs camelCase inlineData handling, HTTP error surfacing, and empty-audio edge cases. - docs: TTS features page updated to list seven providers with the new gemini config block and ffmpeg notes. Live-tested against api key against gemini-2.5-flash-preview-tts: .wav, .mp3, and Telegram-compatible .ogg (Opus codec) all produce valid playable audio.
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