Desktop app auto-plays audio despite autoplay_on_generate:false being disabled

[KOwl64]

Setting autoplay_on_generate:false via /settings/generation does not prevent the desktop
app from auto-playing generated audio when calling /speak or /generate API. This causes
double-play (desktop app first, then manual playback).

Steps to reproduce:

1. Call POST /speak or POST /generate with any text
2. Audio plays automatically in desktop app despite autoplay disabled

Expected: No audio should play from desktop app
Actual: Desktop app auto-plays, causing double-play

Environment:

• Windows 11 Pro
• Voicebox version 0.5.0
• voicebox.exe desktop app running

Workaround:
Kill voicebox.exe process before generating, then playback manually