UnrelateUserWhenArgumentNil used User :update which only accepts :email.
Switch to :update_user with member: nil so manage_relationship clears member_id.
- Fix get_last_completed_cycle to find most recent completed cycle
- Fix create_cycle helpers to delete auto-generated cycles first
- Fix Ash.destroy return value handling
- Fix form selectors to use specific IDs
- Fix URL parameter names for filters
- Fix Ash.read_one return value expectations in tests