fix(private-room): preserve payment return route

src/data/storage/payment/pending_payment_order_storage.ts

@@ -12,7 +12,7 @@ const PendingPaymentOrderSchema = z.object({
   payChannel: z.literal("ezpay"),
   subscriptionType: z.enum(["vip", "topup", "tip"]),
   tipCoffeeType: z.enum(["small", "medium", "large"]).optional(),
-  returnTo: z.enum(["chat"]).optional(),
+  returnTo: z.enum(["chat", "private-room"]).optional(),
   createdAt: z.number(),
 });