feat: implement lazy singleton pattern for repository instances and update related imports

src/data/repositories/payment_repository.ts

@@ -18,6 +18,7 @@ import { PaymentApi, paymentApi } from "@/data/services/api";
 import { PaymentPlansStorage } from "@/data/storage/payment";
 import type { IPaymentRepository } from "@/data/repositories/interfaces";
 import { Result } from "@/utils/result";
+import { createLazySingleton } from "./lazy_singleton";
 
 export class PaymentRepository implements IPaymentRepository {
   constructor(private readonly api: PaymentApi) {}
@@ -83,8 +84,10 @@ export class PaymentRepository implements IPaymentRepository {
   }
 }
 
-/** 全局单例。 */
-export const paymentRepository = new PaymentRepository(paymentApi);
+/** 全局懒单例。 */
+export const getPaymentRepository = createLazySingleton<IPaymentRepository>(
+  () => new PaymentRepository(paymentApi),
+);
 
 export function isVipPaymentPlan(plan: PaymentPlan): boolean {
   return plan.vipDays !== null;