feat(Localization, User Management): add missingUserId translations and enhance user ID handling

- Added translations for the "missingUserId" key in multiple languages to improve user feedback when user ID is not available.
- Updated the user ID handling in the store and WorkerSchedulesView component to ensure proper user identification when sending data to the daemon.
- Enhanced error handling to notify users when the user ID is missing, improving overall user experience.

frontend/src/i18n/locales/en/admin.json

@@ -395,7 +395,8 @@
                 "cadence": "Cadence",
                 "nextRun": "Latest next run",
                 "remaining": "Remaining",
-                "noTasks": "No tasks for this worker."
+                "noTasks": "No tasks for this worker.",
+                "missingUserId": "No user ID available (setUserId missing)."
             }
         },
         "chatrooms": {