fix: update Piper TTS endpoint and request format

Piper is on 192.168.129.9:5100, not :5000. It expects POST with
JSON body {"text": "..."}, not GET with query params. Also update
Whisper default to 192.168.129.9.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/voice.py

@@ -14,7 +14,6 @@ import logging
 import threading
 import time
 import wave
-from urllib.parse import quote_plus
 import urllib.request
 
 from derp.http import urlopen as _urlopen
@@ -36,8 +35,8 @@ _MAX_BYTES = int(_MAX_DURATION * _SAMPLE_RATE * _SAMPLE_WIDTH)
 _FLUSH_INTERVAL = 0.5    # flush monitor poll interval
 _MAX_SAY_LEN = 500       # max characters for !say
 
-_WHISPER_URL = "http://192.168.122.1:8080/inference"
-_PIPER_URL = "http://192.168.122.1:5000/"
+_WHISPER_URL = "http://192.168.129.9:8080/inference"
+_PIPER_URL = "http://192.168.129.9:5100/"
 
 # -- Per-bot state -----------------------------------------------------------
 
@@ -185,11 +184,16 @@ async def _flush_monitor(bot):
 # -- TTS: Piper fetch + playback --------------------------------------------
 
 
-def _fetch_tts(url: str) -> str | None:
-    """Fetch TTS WAV from Piper to a temp file.  Blocking."""
+def _fetch_tts(piper_url: str, text: str) -> str | None:
+    """POST text to Piper TTS and save the WAV response.  Blocking."""
     import tempfile
     try:
-        resp = _urlopen(url, timeout=30, proxy=False)
+        payload = json.dumps({"text": text}).encode()
+        req = urllib.request.Request(
+            piper_url, data=payload, method="POST",
+        )
+        req.add_header("Content-Type", "application/json")
+        resp = _urlopen(req, timeout=30, proxy=False)
         data = resp.read()
         resp.close()
         if not data:
@@ -210,9 +214,10 @@ async def _tts_play(bot, text: str):
     from pathlib import Path
 
     ps = _ps(bot)
-    url = ps["piper_url"] + "?text=" + quote_plus(text)
     loop = asyncio.get_running_loop()
-    wav_path = await loop.run_in_executor(None, _fetch_tts, url)
+    wav_path = await loop.run_in_executor(
+        None, _fetch_tts, ps["piper_url"], text,
+    )
     if wav_path is None:
         return
     try: