bugfix to permission err on model

src/utils.py

@@ -22,7 +22,6 @@ model_names = {
 
 # Using only the two specified sherpa-onnx models from Hugging Face
 sensevoice_models = {
-    "SenseVoice Small (2025)": "csukuangfj/sherpa-onnx-sense-voice-zh-en-ja-ko-yue-2025-09-09",
     "SenseVoice Small (2025 int8)": "csukuangfj/sherpa-onnx-sense-voice-zh-en-ja-ko-yue-int8-2025-09-09",
     "SenseVoice Small (2024)": "csukuangfj/sherpa-onnx-sense-voice-zh-en-ja-ko-yue-2024-07-17"
 }
@@ -35,6 +34,20 @@ available_gguf_llms = {
 
 s2tw_converter = opencc.OpenCC('s2twp')
 
+def get_writable_model_dir():
+    """Get appropriate model directory for HF Spaces"""
+    # Check for HF Spaces environment
+    if os.environ.get('SPACE_ID'):
+        # Use HF Spaces cache directory
+        cache_dir = Path('/tmp/models')
+    else:
+        # Use standard cache directory
+        cache_dir = Path.home() / ".cache" / "speech_assistant" / "models"
+    
+    # Ensure directory exists
+    cache_dir.mkdir(parents=True, exist_ok=True)
+    return cache_dir
+
 def download_sensevoice_model(model_name: str) -> Path:
     """Download SenseVoice model from Hugging Face using official tools"""
     
@@ -46,7 +59,8 @@ def download_sensevoice_model(model_name: str) -> Path:
     
     # Use model_name directly as repo_id
     repo_id = model_name
-    local_dir = Path("./models") / model_name.replace("/", "--")
+    model_cache_dir = get_writable_model_dir()
+    local_dir = model_cache_dir / model_name.replace("/", "--")
     
     # Check if model already exists
     model_file = "model.int8.onnx" if "int8" in model_name else "model.onnx"
@@ -119,7 +133,8 @@ def load_sensevoice_model(model_name: str = "csukuangfj/sherpa-onnx-sense-voice-
     except Exception as e:
         print(f"Failed to load SenseVoice model: {e}")
         # Try to force redownload on next attempt
-        model_dir = Path("./models") / model_name.replace("/", "--")
+        model_cache_dir = get_writable_model_dir()
+        model_dir = model_cache_dir / model_name.replace("/", "--")
         if model_dir.exists():
             import shutil
             print(f"Removing model directory for redownload: {model_dir}")