Update main.py

main.py

@@ -98,7 +98,7 @@ def handle_image_message(event):
         image_binary = image_generator.generate_image_with_gemini(prompt)
 
         if image_binary:
-            image_url = image_generator.upload_image_to_imgur()
+            image_url = image_generator.upload_image_to_tmp()
 
             if image_url:
                 # 使用 push message 發送圖片，避免 reply token 超時