- Safe delete for empty IPD charge groups with CSRF-safe AJAX
- Migration: add sort_order to ipd_item_type (backfilled)
- Sort order UI on create/edit/list views; persist in controller/model
- Up/Down swap buttons on group list (AJAX swap endpoint + CSRF refresh)
- Fix 500 on edit screen: restore missing getItemTypeById() in ItemIpdModel
- IpdBillingModel: propagate sort_order ordering to ipd-charges and bill-details tabs
- Billing IPD Charges tab: Bedside Clinical/Nursing Charge and Doctor Visit Charge panels now collapsible, start collapsed