Update app.py

app.py

@@ -200,6 +200,9 @@ class Qwen3VLAutoThinkDemo:
         Returns:
             Dictionary containing response and metadata
         """
+        if self.model.device.type != "cuda":
+            self.model.to("cuda")
+        
         # Prepare message
         message = [{"role": "system", "content": self.system_prompt}]
         content_parts = []