feat(k1): wire canonical control session to UI

plugins/xgrids-k1/frontend/src/runtimeContext.tsx

@@ -140,13 +140,17 @@ export function XgridsK1RuntimeProvider({
     if (!activeModel) return;
     return registerDeactivation(async () => {
       if (controller.pendingAction !== null) return false;
-      // Always ask the backend to stop. The browser snapshot may be stale or not
-      // loaded yet, while a previous local capture is still alive.
+      // Never translate navigation/model switching into a K1 control command.
+      // The operator must explicitly finish or close the canonical dialogue.
+      if (controller.state?.application_control_session?.control_socket_open) {
+        return false;
+      }
       return controller.stop();
     });
   }, [
     activeModel,
     controller.pendingAction,
+    controller.state?.application_control_session?.control_socket_open,
     controller.stop,
     registerDeactivation,
   ]);