feat: playlist save/load, queue durations, whisper bias, greet fix

- Move TTS greeting from mumble._play_greet to voice.on_connected
  (fires once on first connect, gated on _is_audio_ready)
- Add initial_prompt multipart field to Whisper STT for trigger word
  bias (auto-generated from trigger config, overridable)
- Enhanced !queue: elapsed/total on now-playing, per-track durations,
  footer with track count and total time
- New !playlist command: save/load/list/del named playlists via
  bot.state persistence (playlist:<name> keys)
- Fix duck floor test (1% -> 2% to match default change)

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

plugins/voice.py

@@ -47,9 +47,12 @@ _PIPER_URL = "http://192.168.129.9:5100/"
 def _ps(bot):
     """Per-bot plugin runtime state."""
     cfg = getattr(bot, "config", {}).get("voice", {})
+    trigger = cfg.get("trigger", "")
+    # Bias Whisper toward the trigger word unless explicitly configured
+    default_prompt = f"{trigger.capitalize()}, " if trigger else ""
     return bot._pstate.setdefault("voice", {
         "listen": False,
-        "trigger": cfg.get("trigger", ""),
+        "trigger": trigger,
         "buffers": {},          # {username: bytearray}
         "last_ts": {},          # {username: float monotonic}
         "flush_task": None,
@@ -62,6 +65,7 @@ def _ps(bot):
         "noise_scale": cfg.get("noise_scale", 0.667),
         "noise_w": cfg.get("noise_w", 0.8),
         "fx": cfg.get("fx", ""),
+        "initial_prompt": cfg.get("initial_prompt", default_prompt),
         "_listener_registered": False,
     })
 
@@ -170,8 +174,17 @@ def _transcribe(ps, pcm: bytes) -> str:
     ).encode() + wav_data + (
         f"\r\n--{boundary}\r\n"
         f'Content-Disposition: form-data; name="response_format"\r\n\r\n'
-        f"json\r\n--{boundary}--\r\n"
+        f"json"
     ).encode()
+    # Bias Whisper toward the trigger word when configured
+    prompt = ps.get("initial_prompt", "")
+    if prompt:
+        body += (
+            f"\r\n--{boundary}\r\n"
+            f'Content-Disposition: form-data; name="initial_prompt"\r\n\r\n'
+            f"{prompt}"
+        ).encode()
+    body += f"\r\n--{boundary}--\r\n".encode()
     req = urllib.request.Request(ps["whisper_url"], data=body, method="POST")
     req.add_header("Content-Type", f"multipart/form-data; boundary={boundary}")
     resp = _urlopen(req, timeout=30, proxy=False)
@@ -613,10 +626,22 @@ async def cmd_audition(bot, message):
 
 
 async def on_connected(bot) -> None:
-    """Re-register listener after reconnect."""
+    """Re-register listener after reconnect; play TTS greeting on first connect."""
     if not _is_mumble(bot):
         return
     ps = _ps(bot)
     if ps["listen"] or ps["trigger"]:
         _ensure_listener(bot)
         _ensure_flush_task(bot)
+
+    # Greet via TTS on first connection only
+    greet = getattr(bot, "config", {}).get("mumble", {}).get("greet")
+    if greet and not ps.get("_greeted"):
+        ps["_greeted"] = True
+        ready = getattr(bot, "_is_audio_ready", None)
+        if ready:
+            for _ in range(20):
+                if ready():
+                    break
+                await asyncio.sleep(0.5)
+        bot._spawn(_tts_play(bot, greet), name="voice-greet")