Update gradio_app.py

gradio_app.py

@@ -60,8 +60,10 @@ def load_chat(
             history = history_to_messages(history)
             history = history[-TOP_N_HISTORY:]
         files = message.get('files', [])
+        text = message.get('text', 'Describe the photo in detail.')
+        if text.strip() == "": text = 'Describe the photo in detail.'
         content = [
-            {"type": "text", "text": message.get('text', 'Describe the photo in detail.')}
+            {"type": "text", "text": text}
         ]
         if files:
             src_path = files[0]