Fix HuggingFace Spaces storage permissions for DigiPal deployment

- Update production config to use /data instead of /app/data for persistent storage
- Add graceful error handling for directory creation in HF Spaces environment
- Prevent permission errors during app initialization

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

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

config.py

@@ -119,14 +119,15 @@ class DigiPalConfig:
     
     def _load_production_config(self):
         """Production environment configuration"""
-        self.database.path = "/app/data/digipal.db"
-        self.database.backup_dir = "/app/data/backups"
+        # Use /data for HuggingFace Spaces persistent storage
+        self.database.path = "/data/digipal.db"
+        self.database.backup_dir = "/data/backups"
         
         self.gradio.debug = False
         self.gradio.share = False
         
         self.logging.level = "INFO"
-        self.logging.file_path = "/app/logs/digipal.log"
+        self.logging.file_path = "/data/logs/digipal.log"
         
         self.security.session_timeout_hours = 12
         self.security.rate_limit_per_minute = 30
@@ -193,11 +194,19 @@ class DigiPalConfig:
     
     def _validate_config(self):
         """Validate configuration settings"""
-        # Ensure required directories exist
-        Path(self.database.backup_dir).mkdir(parents=True, exist_ok=True)
+        # Ensure required directories exist (only if writable)
+        try:
+            Path(self.database.backup_dir).mkdir(parents=True, exist_ok=True)
+        except (PermissionError, OSError) as e:
+            # In HuggingFace Spaces, directories may be created automatically
+            # or may not be writable during initialization
+            logging.warning(f"Could not create backup directory {self.database.backup_dir}: {e}")
         
         if self.logging.file_path:
-            Path(self.logging.file_path).parent.mkdir(parents=True, exist_ok=True)
+            try:
+                Path(self.logging.file_path).parent.mkdir(parents=True, exist_ok=True)
+            except (PermissionError, OSError) as e:
+                logging.warning(f"Could not create log directory {Path(self.logging.file_path).parent}: {e}")
         
         # Validate port ranges
         if not (1024 <= self.gradio.server_port <= 65535):