- 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.
- Added `get_validated_user_id` utility function to validate user authentication across multiple APIs.
- Updated image upload, request, and listing endpoints to ensure user ownership and proper error handling.
- Enhanced reward management endpoints to include user validation and ownership checks.
- Modified task management endpoints to enforce user authentication and ownership verification.
- Updated models to include `user_id` for images, rewards, tasks, and children to track ownership.
- Implemented frontend changes to ensure UI reflects the ownership of tasks and rewards.
- Added a new feature specification to prevent deletion of system tasks and rewards.
