28. Data Flow: Voucher & Loyalty

Alur promo & poin — dari buat voucher sampai dipakai, plus loyalty poin otomatis.

Voucher: Buat voucher (diskon/persen, min transaksi, masa berlaku) → Customer masukkan kode di POS → Validasi → Diskon + VoucherUsage
Loyalty: Invoice lunas → Poin otomatis (1 poin / Rp 1.000) → Tier naik (bronze→platinum)

Buat Voucher — kode, diskon (persen/fixed), min pembelian, masa berlaku, kuota.
Customer pakai kode di POS → validasi → diskon diterapkan + VoucherUsage tercatat.
Loyalty: tiap invoice lunas → poin otomatis ke customer.
Tier membership naik otomatis (bronze → silver → gold → platinum) berdasarkan total poin.

/admin/vouchers

Voucher promo — kode, diskon, masa berlaku, kuota.

/admin/loyalty

Loyalty poin & tier membership customer.