refactor(app): tighten chat and sync boundaries

src/stores/payment/index.ts

@@ -6,5 +6,4 @@ export * from "./payment-context";
 export * from "./payment-events";
 export * from "./payment-machine";
 export * from "./payment-machine.actors";
-export * from "./payment-success-sync";
 export * from "./payment-state";

src/stores/payment/payment-success-sync.tsx

@@ -1,43 +0,0 @@
-"use client";
-
-/**
- * Payment → User / Chat 同步器
- *
- * 支付成功是跨模块事件：
- * - User 需要重新拉取 profile + entitlements，刷新 isVip / creditBalance。
- * - Chat 需要根据历史锁定消息数量决定直接解锁或弹窗确认。
- */
-import { useEffect, useRef } from "react";
-
-import { useChatDispatch } from "@/stores/chat/chat-context";
-import { useUserDispatch } from "@/stores/user/user-context";
-import { hasPendingChatUnlock } from "@/lib/navigation/chat_unlock_session";
-
-import { usePaymentState } from "./payment-context";
-
-export function PaymentSuccessSync() {
-  const paymentState = usePaymentState();
-  const userDispatch = useUserDispatch();
-  const chatDispatch = useChatDispatch();
-  const lastPaidKeyRef = useRef<string | null>(null);
-
-  useEffect(() => {
-    if (!paymentState.isPaid || !paymentState.currentOrderId) return;
-
-    const paidKey = `${paymentState.currentOrderId}:${paymentState.orderStatus}`;
-    if (lastPaidKeyRef.current === paidKey) return;
-    lastPaidKeyRef.current = paidKey;
-
-    userDispatch({ type: "UserFetch" });
-    if (hasPendingChatUnlock()) return;
-    chatDispatch({ type: "ChatPaymentSucceeded" });
-  }, [
-    chatDispatch,
-    paymentState.currentOrderId,
-    paymentState.isPaid,
-    paymentState.orderStatus,
-    userDispatch,
-  ]);
-
-  return null;
-}