Update app.py

app.py

@@ -61,7 +61,7 @@ run_in_thread()
 start_cleanup_task()  # Activity log cleanup
 
 # ---------------- Core chat/session routes --------------------------
-app.include_router(chat_router)
+app.include_router(chat_router, prefix="/api")
 
 # ---------------- Admin API routes ----------------------------------
 app.include_router(admin_router)