more safe dict

app.py

@@ -19,8 +19,15 @@ def safe_dict(obj):
         return [safe_dict(i) for i in obj]
     elif isinstance(obj, bytes):
         return obj.decode(errors="replace")
+    elif hasattr(obj, "__dict__"):
+        return safe_dict(vars(obj))  # Recursively process custom objects
+    elif hasattr(obj, "to_dict"):
+        return safe_dict(obj.to_dict())  # If object has a to_dict() method
     else:
-        return obj
+        try:
+            return str(obj)  # Fallback
+        except Exception:
+            return None
 
 @app.route("/")
 def index():