fix email sender all flow

server/services/payment.service.ts

@@ -183,6 +183,10 @@ async function applyGatewayStatus(
       if (newStatus === "PAID" && !isConflict) {
         void notifyPaymentPaid(payment.id);
       }
+      // E3.3 — pembayaran kadaluarsa/gagal: kabari user supaya bisa retry.
+      if (newStatus === "EXPIRED" || newStatus === "FAILED") {
+        void notifyPaymentFailed(payment.id);
+      }
 
       return {
         ok: true,
@@ -504,6 +508,35 @@ async function notifyPaymentPaid(paymentId: string) {
   });
 }
 
+/** E3.3 — kabari user kalau pembayaran expired/gagal supaya bisa retry. */
+async function notifyPaymentFailed(paymentId: string) {
+  const payment = await prisma.payment.findUnique({
+    where: { id: paymentId },
+    include: {
+      booking: {
+        include: {
+          user: { select: { email: true, name: true } },
+          trip: { select: { id: true, title: true } },
+        },
+      },
+    },
+  });
+  if (!payment) return;
+  await emailService.send({
+    to: payment.booking.user.email,
+    idempotencyKey: `payment_expired-${payment.id}`,
+    template: {
+      template: "payment_expired",
+      data: {
+        userName: payment.booking.user.name,
+        tripTitle: payment.booking.trip.title,
+        tripId: payment.booking.trip.id,
+        amount: payment.amount,
+      },
+    },
+  });
+}
+
 // Re-export untuk testing langsung kalau perlu (tetap private dari modul lain).
 export const _internal = { applyGatewayStatus };
 export type { MidtransTransactionStatus };