fix: apply telegram group member monthly price

frontend/components/account/__tests__/paymentReferralPricing.test.ts

@@ -23,6 +23,10 @@ export function runTests() {
     path.join(projectRoot, "components", "account", "usePaymentFlow.ts"),
     "utf8",
   );
+  const useBilling = fs.readFileSync(
+    path.join(projectRoot, "components", "account", "useBilling.ts"),
+    "utf8",
+  );
   const types = fs.readFileSync(
     path.join(projectRoot, "components", "account", "types.ts"),
     "utf8",
@@ -59,6 +63,19 @@ export function runTests() {
       !usePaymentFlow.includes("monthlyPlanList"),
     "payment hooks must not filter checkout plans down to monthly only",
   );
+  assert(
+    useAccountPayment.includes("applyTelegramGroupPricingToPlanList") &&
+      useAccountPayment.includes("backend?.telegram_pricing") &&
+      useAccountPayment.includes('=== "pro_monthly"') &&
+      useAccountPayment.includes("amount_usdc: telegramAmountUsdc"),
+    "account payment plan cards must display the 5 USDC Telegram group member monthly price after /bind verification",
+  );
+  assert(
+    useBilling.includes("telegramGroupPriceApplies") &&
+      useBilling.includes("backend?.telegram_pricing?.is_group_member") &&
+      useBilling.includes("!telegramGroupPriceApplies"),
+    "billing must not let referral first-month pricing override the lower Telegram group member monthly price",
+  );
   assert(
     types.includes("ReferralSummary") &&
       types.includes("referral?: ReferralSummary | null") &&

frontend/components/account/account-copy.ts

@@ -271,8 +271,8 @@ export function createAccountCopy(isEn: boolean): Record<string, string> {
       verifyUnknown: isEn ? "Unknown error" : "未知错误",
       // ── Telegram bind messages ────────────────────────────────────────
       telegramVerifySuccess: isEn
-        ? "Telegram group membership verified. Checkout follows the selected Pro plan."
-        : "Telegram 群成员验证成功，结算金额以当前选择的 Pro 套餐为准。",
+        ? "Telegram group membership verified. Member monthly price {amount} USDC is active."
+        : "Telegram 群成员验证成功，群友月付价 {amount} USDC 已生效。",
       telegramBindClickHint: isEn
         ? "Open the Telegram Bot, click Start, and confirm binding. Then refresh this page to request group entry."
         : "已打开 Telegram Bot，请在 Bot 内点击 Start 并确认绑定；完成后刷新本页再申请入群。",

frontend/components/account/useAccountPayment.ts

@@ -13,14 +13,37 @@ import type {
   AuthMeResponse,
   BoundWallet,
   PaymentConfig,
+  PaymentPlan,
   ProviderMode,
   InjectedProviderOption,
+  TelegramPricing,
 } from "./types";
 import { usePaymentState } from "./usePaymentState";
 import { useWalletBind } from "./useWalletBind";
 import { usePaymentFlow } from "./usePaymentFlow";
 import { useBilling } from "./useBilling";
 
+// ============================================================
+function telegramMemberAmountUsdc(pricing?: TelegramPricing | null) {
+  if (!pricing?.is_group_member) return "";
+  const amount = String(pricing.amount_usdc || "").trim();
+  const numeric = Number(amount);
+  return Number.isFinite(numeric) && numeric > 0 ? amount : "";
+}
+
+function applyTelegramGroupPricingToPlanList(
+  plans: PaymentPlan[],
+  pricing?: TelegramPricing | null,
+): PaymentPlan[] {
+  const telegramAmountUsdc = telegramMemberAmountUsdc(pricing);
+  if (!telegramAmountUsdc) return plans;
+  return plans.map((plan) =>
+    String(plan.plan_code || "").toLowerCase() === "pro_monthly"
+      ? { ...plan, amount_usdc: telegramAmountUsdc }
+      : plan,
+  );
+}
+
 // ============================================================
 export interface UseAccountPaymentParams {
   isEn: boolean;
@@ -387,7 +410,10 @@ export function useAccountPayment(params: UseAccountPaymentParams) {
   ]);
 
   // ── Selected plan (derived, shared across sub-hooks) ───
-  const effectivePlanList = paymentConfig?.plans || [];
+  const effectivePlanList = applyTelegramGroupPricingToPlanList(
+    paymentConfig?.plans || [],
+    backend?.telegram_pricing,
+  );
   const selectedPlan = effectivePlanList.find((p) => p.plan_code === selectedPlanCode) || effectivePlanList[0];
 
   // ── useWalletBind ──────────────────────────────────────

frontend/components/account/useBilling.ts

@@ -122,6 +122,10 @@ export function useBilling(params: UseBillingParams) {
     const listAmount =
       Number.isFinite(listAmountRaw) && listAmountRaw > 0 ? listAmountRaw : 29.9;
     const selectedPlanCode = String(selectedPlan?.plan_code || "").toLowerCase();
+    const telegramGroupPriceApplies = Boolean(
+      selectedPlanCode === "pro_monthly" &&
+        backend?.telegram_pricing?.is_group_member,
+    );
     const referral = backend?.referral;
     const referralPending = Boolean(
       referral?.applied_code ||
@@ -137,6 +141,7 @@ export function useBilling(params: UseBillingParams) {
     const referralApplies =
       selectedPlanCode === "pro_monthly" &&
       referralPending &&
+      !telegramGroupPriceApplies &&
       backend?.subscription_active !== true;
     const planAmount = referralApplies
       ? Number.isFinite(discountedMonthlyRaw) && discountedMonthlyRaw > 0
@@ -187,6 +192,7 @@ export function useBilling(params: UseBillingParams) {
     paymentConfig?.points_redemption,
     backend?.referral,
     backend?.subscription_active,
+    backend?.telegram_pricing?.is_group_member,
     selectedPlan?.plan_code,
     selectedPlan?.amount_usdc,
     totalPoints,