- Add 'tags' field to EquipmentInstance type
- Modify Prepare step to show warning and different button text when item has enchantments
- Consolidate disenchanting into Prepare step (remove separate disenchant UI)
- After successful preparation, item receives 'Ready for Enchantment' tag
- Modify Apply step to only allow applying enchantments to items tagged 'Ready for Enchantment'
- Update subtask_6_progress.md and todo.md to mark Sub-Task 6 as completed