Conversation playground:
- Live speech preview: MediaRecorder sends accumulated audio to
/api/transcribe-bytes every 2.5 s; interim Whisper result shown in
the text input field while recording. Web Speech API tried first as
a faster path when available (HTTPS/localhost).
- VAD auto-stop: AudioContext AnalyserNode measures RMS every frame;
auto-stops after 1.5 s silence with a visible countdown. Auto-stop
toggle to revert to click-to-stop.
- Hands-free mode: mic auto-restarts after the agent finishes speaking
via audio.ended event + generation-counter cancellation. Hands-free
toggle (on by default) to disable.
Navigation:
- Persist active section and sub-page in localStorage; hard-reload
returns to the same page instead of always jumping to My Voices.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Frontend:
- Add pill-shaped text input + send button (→) to the left of the mic button
- Enter key or → click sends text directly without recording audio
- Input is disabled while a turn is processing; cleared on submit
- Welcome message updated to mention both input methods
- New CSS: .conv-input-bar, .conv-text-row, .conv-text-inp, .conv-send-btn,
.conv-divider (visual separator between text and mic sections)
Backend:
- /api/conversation/turn: audio is now optional (UploadFile | None)
- New text form field — when provided, STT step is skipped and text is
used as the transcript directly; SSE emits transcript event with stt_ms=null
- Raises 400 if neither audio nor text is supplied
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Conversation Playground (new section):
- WhatsApp-style chat UI with user/assistant speech bubbles
- Click-to-record mic button using MediaRecorder API
- STT → LLM streaming → TTS pipeline via SSE (POST /api/conversation/turn)
- LLM tokens stream into assistant bubble in real time
- Audio auto-plays when TTS synthesises the reply
- Right-side stats panel: STT / LLM TTFT / LLM total / TTS / Total with bar chart
- Turn history list with per-turn total time and pass/fail indicator
- Configurable: STT backend, LLM URL + model, TTS backend + voice, system prompt
- Conversation history maintained across turns (last 20 messages sent to LLM)
- GET /api/conversation/llm-models proxies model list from any OpenAI-compatible LLM
XTTS v2 backend:
- Registers xtts as a first-class TTS backend (xtts_url setting, display name,
capabilities, health/voice discovery, OpenAI-compatible generation)
- Added XTTS URL field to Settings → Connections
- Use-as-TTS button now saves to xtts_url (not tts_url)
- Batch benchmark backend select now refreshes alongside perf/preview selectors
VibeVoice fix:
- Added /voices to _TTS_VOICE_ENDPOINTS so VibeVoice voices are discovered
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
