Sync wrapper with Veskslop: streaming/crunch modes, vox/hev voice IDs

The Veskslop integration copy had grown word streaming
(VESKSLOP_TTS_STREAM, stream gain), 1990s crunch filters
(VESKSLOP_TTS_CRUNCH[_BITS|_RATE]), echo timing/level, and first-class
vox/hev voice IDs with preset-aware default metadata. Merge those back
into the standalone repo, keeping the tuned VOX preset (pitch 0, rate 15,
head size 34, lowering 50) in the preset and in the published defaults.

Update the wrapper regression test to the tuned registry values, add
__pycache__ to .gitignore, and document the new variables, voice IDs,
placeholder set and the word-mode-over-VOX precedence in README, NOTES
and TTS-DESIGN.

docs/NOTES.md

@@ -127,8 +127,8 @@ without them.
   the Python port; outputs are identical on the 31-line corpus. Re-check after any
   parser change while the clone is available.
 - VOX mode is Flextalk-only. The wrapper enables it with `VESKSLOP_TTS_VOX=1`
-  (`VESKSLOP_TTS_VOX_CLEAN=1` drops the stutter wrapper) and it takes precedence
-  over `VESKSLOP_TTS_WORDS`.
+  (`VESKSLOP_TTS_VOX_CLEAN=1` drops the stutter wrapper); word mode
+  (`VESKSLOP_TTS_WORDS=1`) wins and skips VOX prosody.
 - Half-Life presets (`VESKSLOP_TTS_PRESET=vox|hev`) target Keith Bell only. VOX starts
   from NetTTS `nettts_flextalk_vox_profile.reg` (pitch 3, rate 17, head 52, lowering 40)
   and is tuned against the game's word assets from `suchipi/half-life-vox-console`:

docs/TTS-DESIGN.md

@@ -254,6 +254,9 @@ record what the engine needs to interpret, add, or hide._
 - Assigned stable IDs: `sam`, `mary`, `mike`, `keith-bell`, `kerry-watson`; variants get
   `mike-telephone`, `mike-hall`, `mary-stadium`, `mike-space`, and so on. Unknown IDs fall
   back to `sam`.
+- `vox` (VOX (Half-Life)) and `hev` (HEV suit) are Keith Bell with a fixed preset profile;
+  selecting one implies `VESKSLOP_TTS_PRESET` (`vox` also enables VOX prosody). Their
+  `defaults=` metadata follows the active preset so the UI snap points match.
 - `/voices` (HTTP mode) reports `language: "en"`, gender, and the speed/pitch ranges below.
 
 ### Speed and pitch mapping (measured 2026-09-15)
@@ -372,15 +375,16 @@ Requirements and scope:
   The host passes `TTSDATAFLAG_TAGGED`, so the engine honors them. Other voices ignore
   `VESKSLOP_TTS_VOX`.
 - Needs `python3` at runtime; the wrapper fails loudly when it is missing.
-- Mutually exclusive with `VESKSLOP_TTS_WORDS` (VOX wins).
+- Combines with `VESKSLOP_TTS_WORDS`: word mode wins and VOX prosody is skipped.
 - Measured on the dev host for "Now approaching Sector C test lab. Please stand clear
   of the test chamber.": plain 4.70 s with 1 pause, VOX 7.81 s with 8 pauses.
 
 Other NetTTS features and their relevance:
 
-- Inline `/rate N`, `/pitch N`, `[[pause N]]`: not ported. Veskslop has speed/pitch
-  controls and the profile window; `[[pause N]]` could be added as a wrapper-level
-  text splitter later (NetTTS supports it only outside VOX mode).
+- Inline `/rate N`, `/pitch N` are handled by the wrapper at the start of a line
+  (percent, or a multiplier at or below 2.0); they override the env sliders for that
+  line and are not spoken. `[[pause N]]` is not ported; it could be added as a
+  wrapper-level text splitter later.
 - TCP server with `START`/`STOP` status sockets: not needed; Veskslop owns playback
   and knows when a line ends.
 - Winetricks prefix automation (`winxp`, `vcrun6`, `mfc42`, `riched20`): not needed;
@@ -702,10 +706,16 @@ Inputs: `{out}`, `{text_file}`, optional positional voice/speed/pitch/expression
 | --- | --- |
 | `VESKSLOP_TTS_PROFILE` | `pitch:27:...`/`key=value,...` overrides; the wrapper writes the full profile (defaults + overrides) to the Wine registry with `wine reg import` before every synthesis. |
 | `VESKSLOP_TTS_HIGHPASS` | High-pass Hz, 40-400 (default 40). |
-| `VESKSLOP_TTS_ECHO` | Mono echo 0-100 (`aecho`), default 0. |
+| `VESKSLOP_TTS_ECHO` | Mono echo 0-100 (`aecho`), default 0. The echo is mixed under the dry voice, so the voice level does not change. |
+| `VESKSLOP_TTS_ECHO_DELAY_MS` / `VESKSLOP_TTS_ECHO_LEVEL` | Echo delay 10-400 ms (default 60) and repeat level 0-0.95 relative to the dry voice (default 0.85). |
+| `VESKSLOP_TTS_CRUNCH` | `off` (default) or `hl90`, `hl90hq`, `telephone`, `adpcm`, `crush`: 1990s lossy character, applied last. |
+| `VESKSLOP_TTS_CRUNCH_BITS` / `VESKSLOP_TTS_CRUNCH_RATE` | Bit depth 1-16 and sample rate 4000-48000 overrides for the crunch stage. |
+| `VESKSLOP_TTS_STREAM` / `VESKSLOP_TTS_STREAM_GAIN_DB` | `1` = word mode writes the WAV as it goes (no measurement pass); fixed gain in dB for that path. |
 | `VESKSLOP_TTS_WORDS` / `VESKSLOP_TTS_WORD_GAP_MS` | Word-by-word synthesis with silence gaps (Flextalk only). |
 
-Placeholders `{profile}`, `{highpass}`, `{echo}`, `{words}`, `{word_gap_ms}` mirror the env vars.
+Placeholders `{profile}`, `{highpass}`, `{echo}`, `{echo_delay_ms}`, `{echo_level}`,
+`{words}`, `{word_gap_ms}`, `{crunch}`, `{crunch_bits}`, `{crunch_rate}`, `{stream}`,
+`{vox}`, `{vox_clean}`, `{preset}` mirror the env vars.
 `wine regedit` fails headlessly but returns 0: use `wine reg import`. A missing profile value
 must always write the engine default so no stale registry state survives.