refund roadmap pr-1 and pr-2

server/repositories/booking.repo.ts

@@ -71,4 +71,17 @@ export const bookingRepo = {
       data: { status },
     });
   },
+
+  /**
+   * Jumlah booking PAID/PARTIALLY_REFUNDED di trip. Dipakai untuk preview
+   * dampak cancel-trip (berapa peserta yang akan dapat auto-refund).
+   */
+  async countSettledForTrip(tripId: string) {
+    return prisma.booking.count({
+      where: {
+        tripId,
+        status: { in: ["PAID", "PARTIALLY_REFUNDED"] },
+      },
+    });
+  },
 };