Async guard

This should prevent race condition and crashes when when changing modes (locking, unlocking, creating new profile)

clive/__private/core/error_handlers/tui_error_handler.py

@@ -39,5 +39,5 @@ class TUIErrorHandler(ErrorHandlerContextManager[Exception]):
         async def impl() -> None:
             await self._app.switch_mode_into_locked(save_profile=False)
 
-        if self._app._going_into_locked_mode_guard.is_available:
+        if self._app._screen_remove_guard.is_available:
             self._app.run_worker(impl())