- Align DebtStatus with backend Prisma schema (DRAFT, ACTIVE, OVERDUE, COMPLETED, DEFAULTED, CANCELLED)
- Add DEBT_PAYMENT_DUE to NotificationType and DEBT to NotificationSourceType
- Integrate DEBT_PAYMENT_DUE in NotificationCard surface styling, notification type filter, and i18n locales (vi/en)
- Enhance debt card, modal, and detail views to properly handle overdue status and repayment flows
- Update memory.md with latest UX decisions on modal separation and localization