Prevent duplicate route registration in FlaskApp class

app/app.py

@@ -10,6 +10,7 @@ class FlaskApp:
         self.messages = []  
         self.pending_llm_responses = []  
         self.clients = []
+        self.routes_registered = False  # Prevent duplicate route registration
         self.register_routes()
 
     def register_routes(self):