Fix Kyutai model identifier and storage paths for HuggingFace Spaces

- Update Kyutai model from kyutai/stt-2.6b-en_fr-trfs to kyutai/stt-2.6b-en-trfs
- Replace /data paths with /tmp temporary storage for HF Spaces compatibility
- Use tempfile module to create writable session directories
- Fixes model loading errors and permission denied issues

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

config.py

@@ -23,7 +23,7 @@ class DatabaseConfig:
 class AIModelConfig:
     """AI model configuration settings"""
     qwen_model: str = "Qwen/Qwen3-0.6B"
-    kyutai_model: str = "kyutai/stt-2.6b-en_fr-trfs"
+    kyutai_model: str = "kyutai/stt-2.6b-en-trfs"
     flux_model: str = "black-forest-labs/FLUX.1-dev"
     device: str = "auto"
     torch_dtype: str = "auto"
@@ -119,15 +119,22 @@ class DigiPalConfig:
     
     def _load_production_config(self):
         """Production environment configuration"""
-        # Use /data for HuggingFace Spaces persistent storage
-        self.database.path = "/data/digipal.db"
-        self.database.backup_dir = "/data/backups"
+        # Use /tmp for HuggingFace Spaces (writable temporary storage)
+        import tempfile
+        import os
+        
+        # Create temp directory for this session
+        temp_dir = os.path.join(tempfile.gettempdir(), "digipal_session")
+        os.makedirs(temp_dir, exist_ok=True)
+        
+        self.database.path = os.path.join(temp_dir, "digipal.db")
+        self.database.backup_dir = os.path.join(temp_dir, "backups")
         
         self.gradio.debug = False
         self.gradio.share = False
         
         self.logging.level = "INFO"
-        self.logging.file_path = "/data/logs/digipal.log"
+        self.logging.file_path = os.path.join(temp_dir, "digipal.log")
         
         self.security.session_timeout_hours = 12
         self.security.rate_limit_per_minute = 30