New component that allows admins to edit existing chores:
- Loads chore data and pre-populates form with current values
- Multi-user checkbox selection grid
- Updates all chore fields: title, description, room, frequency, points, due_date, assigned_user_ids
- Loading spinner while fetching chore
- Error handling with detailed messages
- Admin-only feature called from ChoreCard edit button
jessikitty
c7d9e90980