Client test sesuai doc API - Floox Predictive. Secret key tidak terekspos ke browser
(disimpan di server.js). Alur: Auth/TokenRequest → Phone/Register → Queue/Session → POST iframe ke /PHONE/Dialer/Embed.
Ext default 77500, queue 501.
allow="microphone" wajib (prompt izin mic). Event dari widget ditangkap via window.message di bawah.