- Implemented logic to hide delete button for system tasks and rewards in ItemList.vue, TaskView.vue, and RewardView.vue.
- Added backend checks in task_api.py and reward_api.py to return 403 for delete requests on system items.
- Ensured that items without a user_id are treated as system items across frontend and backend.
- Updated acceptance criteria to include UI and backend tests for the new functionality.
