## 1. Frontend

- [x] 1.1 `resources/views/pages/pos.blade.php`: remove the "Người thân" (`data-model="dependant"`) form-group from the customer info panel, replace it with a hidden-by-default "Nợ hiện tại" form-group (`#customerDebtGroup` / `#customerDebtTotal`)
- [x] 1.2 `app/Http/Controllers/PosController.php` (`fillCustomerInfo`): show `#customerDebtGroup` with `cus.debt_total` formatted as `Number(...).toLocaleString('vi-VN') + ' ₫'` when `debt_total > 0`; hide it otherwise and when no customer is selected — matching the existing formatting convention used in `debts.blade.php`
- [x] 1.3 Manual QA (Playwright against the local docker stack, `admin@/pos`): selected "Trần Thị Lan" (`debt_total=161000`) → `#customerDebtGroup` visible, showing "161.000 ₫"; selected "Nguyễn Văn Khỏe" (`debt_total=0`) → `#customerDebtGroup` hidden; no console/page errors either time
- [x] 1.4 Confirmed the "Người thân" field only ever existed in one place per customer-info render (the dependant form-group removed in this change) — the "Thêm khách hàng" modal's own "Người thân" input is a separate, unrelated DOM node and was not touched by this change