UMD Mixer Relay v3.0
====================
Local relay for https://jaysvideo.com/umd-mixer

QUICK START (Windows)
---------------------
  Double-click START_RELAY.bat

FIRST-TIME SETUP + AUTOSTART
-----------------------------
  Double-click SETUP_AUTOSTART.bat

PORTS
-----
  ws://localhost:8765   WebSocket — browser UI
  http://localhost:8766 Companion HTTP API

COMPANION API
-------------
  GET  /tria            all channel state
  GET  /tria/cha  /chb  per-channel state
  GET  /umd             UMD routing config
  POST /umd/{n}         {"source":"cha","mode":"pl_time"}
  POST /umd/{n}/clear   blank that UMD
