feat(subscription): split vip and topup flows

src/app/subscription/subscription-screen.helpers.ts

@@ -1,15 +1,9 @@
 import type { PaymentPlan } from "@/data/dto/payment";
 
 import type { CoinsOfferPlanView } from "./components/subscription-coins-offer-section";
-import type { SubscriptionPlanView } from "./components/subscription-plan-card";
 import type { VipOfferPlanView } from "./components/subscription-vip-offer-section";
 
-export type SubscriptionType = "vip" | "voice";
-
-export const SUBSCRIPTION_BANNER_TITLES: Record<SubscriptionType, string> = {
-  vip: "Subscribe to become the VIP Member",
-  voice: "Buy Voice Message Package",
-};
+export type SubscriptionType = "vip" | "topup";
 
 export function isVipPlan(plan: PaymentPlan): boolean {
   return plan.vipDays !== null;
@@ -19,32 +13,6 @@ export function isCreditPlan(plan: PaymentPlan): boolean {
   return plan.dolAmount !== null;
 }
 
-function isVoicePackagePlan(plan: PaymentPlan): boolean {
-  const orderType = plan.orderType.toLowerCase();
-  const planId = plan.planId.toLowerCase();
-  return (
-    isCreditPlan(plan) ||
-    orderType.includes("voice") ||
-    planId.includes("voice")
-  );
-}
-
-export function isPlanForType(
-  plan: PaymentPlan,
-  subscriptionType: SubscriptionType,
-): boolean {
-  return subscriptionType === "voice"
-    ? isVoicePackagePlan(plan)
-    : isVipPlan(plan);
-}
-
-function currencySymbol(currency: string): string {
-  const normalized = currency.toUpperCase();
-  if (normalized === "CNY") return "¥";
-  if (normalized === "USD") return "$";
-  return `${currency} `;
-}
-
 function formatAmount(amountCents: number | null): string | null {
   if (amountCents === null) return null;
   if (!Number.isFinite(amountCents)) return null;
@@ -78,40 +46,6 @@ function vipOfferTitle(plan: PaymentPlan): string {
   return plan.planName;
 }
 
-function planCaption(
-  plan: PaymentPlan,
-  subscriptionType: SubscriptionType,
-): string {
-  if (subscriptionType === "voice") {
-    return plan.dolAmount === null
-      ? "Voice package"
-      : `${plan.dolAmount} voice messages`;
-  }
-  if (plan.dailyPriceCents !== null) {
-    const dailyPrice = formatAmount(plan.dailyPriceCents);
-    return dailyPrice === null
-      ? "Lifetime"
-      : `${currencySymbol(plan.currency)}${dailyPrice}/day`;
-  }
-  if (plan.vipDays === null) return "Lifetime";
-  const fallbackDailyPrice = plan.amountCents / Math.max(plan.vipDays, 1);
-  return `${currencySymbol(plan.currency)}${formatAmount(fallbackDailyPrice)}/day`;
-}
-
-export function toPlanView(
-  plan: PaymentPlan,
-  subscriptionType: SubscriptionType,
-): SubscriptionPlanView {
-  return {
-    id: plan.planId,
-    name: plan.planName,
-    price: formatAmount(plan.amountCents) ?? "",
-    originalPrice: formatAmount(plan.originalAmountCents),
-    perDay: planCaption(plan, subscriptionType),
-    currencySymbol: currencySymbol(plan.currency),
-  };
-}
-
 export function toVipOfferPlanView(plan: PaymentPlan): VipOfferPlanView {
   return {
     id: plan.planId,