Fix: Chat with Agent button now properly enables chat controls - Use per-user agent storage in enable_chat_controls_with_agent

app.py

@@ -505,9 +505,9 @@ def build_ui():
                 []   # active_children
             )
 
-        def enable_chat_controls_with_agent(agent_name):
-            """Enable chat controls and show proper agent greeting when agent is selected"""
-            agent_json = agents_config.get(agent_name, "")
+        def enable_chat_controls_with_agent(agent_name, request: gr.Request):
+            """Enable chat controls and show proper agent greeting when agent is selected - per-user isolation."""
+            agent_json = get_user_agent(request, agent_name)
             if agent_json:
                 # Get agent data for greeting
                 agent_data = json.loads(agent_json)