Merge main's faster-whisper (local, free) with our Groq support into a
unified three-provider STT pipeline: local > groq > openai.
Provider priority ensures free options are tried first. Each provider
has its own transcriber function with model auto-correction, env-
overridable endpoints, and proper error handling.
74 tests cover the full provider matrix, fallback chains, model
correction, config loading, validation edge cases, and dispatch.
When bound to 127.0.0.1, only show localhost URL instead of listing
unreachable network interfaces. Add hint about WEB_UI_HOST=0.0.0.0
for phone/tablet access. Add VPN/multi-interface and token exposure
tests (11 new tests).
- Path traversal sanitization (Path.name strips ../)
- Media endpoint authentication (401 without token, 404 on traversal)
- hmac.compare_digest usage verification (no == for tokens)
- DOMPurify XSS prevention in HTML template
- Default bind 127.0.0.1 (adapter and config)
- /remote-control token hiding in group chats
- Opus find_library instead of hardcoded paths
- Opus decode error logging (no silent swallow)
- Interrupt _vprint force=True on all 6 calls
- Anthropic interrupt handler in both API call paths
- Update test_web_defaults for new 127.0.0.1 default
play_tts base class forwards metadata via **kwargs to send_voice,
but Discord and Slack adapters did not accept extra keyword arguments,
causing TypeError and silent message handling failure.
Also fix test_web_defaults to patch correct env var (WEB_UI_TOKEN).
