Apply TTS presets with vendor tags and both hives

docs/voice.md

@@ -164,7 +164,13 @@ from the TTS panel:
   A **preset** select (`tts.preset`: factory, VOX, HEV) shifts the Keith Bell speaker profile to
   the Half-Life approximation; `vox` also implies VOX prosody unless VOX is explicitly off, and
   overrides travel as `VESKSLOP_TTS_PRESET` / `{preset}`. Precedence is preset < profile <
-  expression, so the sliders still win over the preset.
+  expression, so the sliders still win over the preset. The wrapper writes the audible profile to
+  both registry hives (plus the preset's Gender/Line Mode and a Default Speaker pointer), and for
+  Flextalk it sends rate/pitch as the sticky `\!R` / `\!%` vendor tags rather than
+  `ITTSAttributes`; attributes only apply to MSTTS voices. Neutral sliders emit neither, so the
+  preset is reproduced exactly. `sh microslopsam/setup/test-wrapper.sh` checks this contract with
+  stubbed wine and engine binaries, no Wine install needed. The preset values also show up in the
+  voice metadata defaults, so the panel's "default" snap points match what the engine gets.
 - **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.