fix: support qwen3 model_type and mlx-4bit subdir for moss models

src/mlx_speech/models/moss_delay/config.py

@@ -72,9 +72,16 @@ def from_dict(cls, payload: dict[str, Any]) -> "MossTTSDelayConfig":
 
     @classmethod
     def from_path(cls, model_dir: str | Path) -> "MossTTSDelayConfig":
-        config_path = Path(model_dir) / "config.json"
+        model_dir = Path(model_dir)
+        config_path = model_dir / "config.json"
         if not config_path.exists():
-            raise FileNotFoundError(f"Config file not found: {config_path}")
+            for subdir in ("mlx-4bit", "mlx-int8", "mlx-8bit"):
+                candidate = model_dir / subdir / "config.json"
+                if candidate.exists():
+                    config_path = candidate
+                    break
+            else:
+                raise FileNotFoundError(f"Config file not found: {config_path}")
         with config_path.open(encoding="utf-8") as f:
             payload = json.load(f)
         return cls.from_dict(payload)

src/mlx_speech/tts/_registry.py

@@ -35,7 +35,16 @@ def _resolve_tts_family(model_dir: Path) -> str:
         n_vq = int(payload.get("n_vq", 0))
         return "moss_local" if n_vq > 20 else "moss_delay"
 
+    if model_type == "qwen3":
+        dir_lower = str(model_dir).lower()
+        if "sound_effect" in dir_lower or "sound-effect" in dir_lower:
+            return "moss_sound_effect"
+        n_vq = int(payload.get("n_vq", 0))
+        if n_vq > 20:
+            return "moss_local"
+        return "moss_delay"
+
     raise ValueError(
         f"Unknown TTS model_type {model_type!r} in {model_dir}. "
-        "Supported: fish_qwen3_omni, vibevoice, audiodit, step1, moss_tts_delay."
+        "Supported: fish_qwen3_omni, vibevoice, audiodit, step1, moss_tts_delay, qwen3."
     )