Refine avatar diagnostics and prune legacy assets

chore(ui): remove top bar placeholder buttons to focus on video diagnostics

feat(frontend): stage timeline, frame counter, black frame detection, connection path badge

chore(static): remove legacy webrtc_prod.js and document static asset inventory

feat: replace index.html with enterprise-grade UI

fix: improve webrtc server stability and diagnostics

feat: upgrade frontend to enterprise-grade premium design

ICE diagnostics: expose TURN/STUN counts; client skips futile relay retry w/out TURN

webrtc: verbose diagnostics (stats, event snapshots, /debug/webrtc_config, env vars)

Avatar: blend reference face onto live frame via landmark mask; show active mode in UI

Fix MediaPipe dependency and enhance WebRTC debugging

Fix WebRTC connection: prevent play() interruptions, clean connection failure handling, add null checks for optional pipeline components

WebRTC: bind outbound earlier, add frames_emitted in /webrtc/debug_state, lower bitrate/resolution, enforce TLS/TCP TURN, client honors forceRelay

WebRTC: use VideoStreamTrack for outbound placeholder; improve server error surfacing; client logs 500 body on offer

WebRTC: add OutboundVideoTrack (black frames until bound) and bind immediately; improved client ontrack logging

WebRTC: pre-announce sendonly transceivers + replaceTrack; add /webrtc/debug_state; richer client playback and relay fallback

WebRTC: add track-before-answer wait; remote autoplay/play(); relay-only fallback reconnect; mute remote video; minor client tweaks

WebRTC: prefer VP8 by default for compatibility; support comma-separated MIRAGE_TURN_URL entries for static TURN

TURN: support Metered.ca via MIRAGE_METERED_API_KEY (fetch ephemeral ICE servers); expose metered_configured in /webrtc/ping

WebRTC: expose /webrtc/ice_config and use it in client; add TURN configured flag to ping; try ICE restart on disconnected to reduce failures

UI: POST reference to /set_reference pre-connect; backend: queue reference before init, add /debug/download_models; LivePortrait native set to false to rely on ONNX safe path; Debug button can trigger download and refresh status

Debug: add UI button to fetch /debug/models and log ONNX presence summary

Auto-initialize pipeline on page load as fallback when button not visible due to caching

UI: add Initialize AI Pipeline button; wire to POST /initialize with status updates

UX: show reference on remote video until animator ready; server: pass-through signature fix; client: show reference_ack/error

Fix track handler elif chain; restore H264 as default preferred codec; attach remote track reliably on client

Stabilize WebRTC: wait for ICE gathering complete, allow cancel during connect, stronger disconnect cleanup and button states

Fix NameError: _peer_state used prior to global declaration; add /webrtc root for mount check; improve client button state on failure

Ensure WebRTC router always mounts: lazy pipeline with pass-through fallback; add /webrtc/ping diagnostics in client; better 503 logging

Fix WebP support and make imports resilient

UI: fix Disconnect teardown; send reference immediately when connected; make avatar video fill container

fix(webrtc): add fallback routes to avoid 404, improve disconnect UX, accept auth token for cleanup; client calls cleanup and handles 404s

feat(docker): switch to Docker Space GPU runtime; prod WebRTC (aiortc) flow; remove legacy WS; token auth; instrumentation p50/p95; requirements harden

Optimize for HuggingFace Spaces: simplified Gradio interface and reduced dependencies

feat(video-fps): B9 enforce max video fps (10) with governance and logging

feat(audio-chunk): B8 hard-set 160ms (2560 samples) chunk duration and log config

feat: phase1-2 baseline echo scaffold