refac

backend/open_webui/utils/payload.py

@@ -7,7 +7,7 @@ from open_webui.utils.misc import (
     deep_update,
     replace_system_message_content,
 )
-from open_webui.utils.chat_variables import render_chat_variables
+from open_webui.utils.chat_variables import render_chat_variables, render_user_variables
 from open_webui.utils.task import prompt_template, prompt_variables_template
 
 
@@ -26,6 +26,8 @@ async def resolve_system_prompt(
             required=False,
         )
 
+    system = render_user_variables(system, getattr(user, 'variables', {}) if user else {})
+
     # Metadata (WebUI Usage)
     if metadata:
         variables = metadata.get('variables', {})