Add the VOX prosody preference and panel controls

docs/voice.md

@@ -156,15 +156,20 @@ from the TTS panel:
   profile.
 - **Radio kit** - high-pass (`tts.highpass`, 40-400 Hz, default 40), mono echo (`tts.echo`, 0-100,
   default 0), and word mode (`tts.words`) with a gap in ms (`tts.wordGapMs`) for the radio/robot
-  character.
+  character. **VOX prosody** (`tts.vox`) routes the line through the NetTTS-style encoder first -
+  sentence breaks, lead-ins, weighted pauses, and Flextalk vendor tags - for Black Mesa
+  announcement energy; **clean** (`tts.voxClean`) drops the staccato wrapper. VOX outranks word
+  mode and needs `python3` on the host. Both travel to the command provider as
+  `VESKSLOP_TTS_VOX` / `VESKSLOP_TTS_VOX_CLEAN` (or the `{vox}` / `{vox_clean}` placeholders).
 - **Test lines** - Attention, Laboratory, Critical, Health, and Radiation, plus two custom lines
   kept in `localStorage`. Each button speaks the line with the current profile, so a change can be
   auditioned without touching the real queue.
 
 The window is movable and recenters every time it opens, so it cannot be lost off screen. Changed
-profile keys travel as `profile` (with `highpass`, `echo`, `words`, and `wordGapMs`) to the command
-provider, which exports `VESKSLOP_TTS_PROFILE`, `VESKSLOP_TTS_HIGHPASS`, `VESKSLOP_TTS_ECHO`,
-`VESKSLOP_TTS_WORDS`, and `VESKSLOP_TTS_WORD_GAP_MS`. The wrapper contract and the registry
+profile keys travel as `profile` (with `highpass`, `echo`, `words`, `wordGapMs`, `vox`, and
+`voxClean`) to the command provider, which exports `VESKSLOP_TTS_PROFILE`, `VESKSLOP_TTS_HIGHPASS`,
+`VESKSLOP_TTS_ECHO`, `VESKSLOP_TTS_WORDS`, `VESKSLOP_TTS_WORD_GAP_MS`, `VESKSLOP_TTS_VOX`, and
+`VESKSLOP_TTS_VOX_CLEAN`. The wrapper contract and the registry
 pitfalls (`wine reg import`; never `echo` for the `.reg` key path) are in
 [TTS-DESIGN.md](../TTS-DESIGN.md).