优化小程序阅读页面，新增好友优惠展示逻辑，支持通过推荐人获取折扣。调整价格计算方式，确保用户在购买章节时能看到实际优惠。更新相关样式以提升用户体验。

miniprogram/pages/read/read.js

@@ -56,6 +56,12 @@ Page({
     sectionPrice: 1,
     fullBookPrice: 9.9,
     totalSections: 62,
+    // 好友优惠展示
+    userDiscount: 5,
+    hasReferralDiscount: false,
+    showDiscountHint: false,
+    displaySectionPrice: 1,
+    displayFullBookPrice: 9.9,
     
     // 弹窗
     showShareModal: false,
@@ -131,11 +137,34 @@ Page({
     }
     
     try {
-      const config = await accessManager.fetchLatestConfig()
+      const userId = app.globalData.userInfo?.id
+      const [config, purchaseRes] = await Promise.all([
+        accessManager.fetchLatestConfig(),
+        userId ? app.request(`/api/miniprogram/user/purchase-status?userId=${userId}`) : Promise.resolve(null)
+      ])
+      const sectionPrice = config.prices?.section ?? 1
+      const fullBookPrice = config.prices?.fullbook ?? 9.9
+      const userDiscount = config.userDiscount ?? 5
+      // 有推荐人 = ref/ referral_code 或 用户信息中有推荐人绑定
+      const hasReferral = !!(wx.getStorageSync('referral_code') || ref || purchaseRes?.data?.hasReferrer)
+      const hasReferralDiscount = hasReferral && userDiscount > 0
+      const showDiscountHint = userDiscount > 0
+      const displaySectionPrice = hasReferralDiscount
+        ? Math.round(sectionPrice * (1 - userDiscount / 100) * 100) / 100
+        : sectionPrice
+      const displayFullBookPrice = hasReferralDiscount
+        ? Math.round(fullBookPrice * (1 - userDiscount / 100) * 100) / 100
+        : fullBookPrice
       this.setData({
         freeIds: config.freeChapters,
-        sectionPrice: config.prices?.section ?? 1,
-        fullBookPrice: config.prices?.fullbook ?? 9.9
+        sectionPrice,
+        fullBookPrice,
+        userDiscount,
+        hasReferralDiscount,
+        showDiscountHint: userDiscount > 0,
+        displaySectionPrice,
+        displayFullBookPrice,
+        purchasedCount: purchaseRes?.data?.purchasedSections?.length ?? this.data.purchasedCount ?? 0
       })
       
       // 先拉取章节获取 id（mid 时必需；id 时可直接用）
@@ -157,7 +186,8 @@ Page({
         accessState,
         canAccess,
         isLoggedIn: !!app.globalData.userInfo?.id,
-        showPaywall: !canAccess
+        showPaywall: !canAccess,
+        purchasedCount: purchaseRes?.data?.purchasedSections?.length ?? 0
       })
       
       await this.loadContent(mid, resolvedId, accessState, prefetchedChapter)
@@ -621,9 +651,34 @@ Page({
       // 1. 刷新用户购买状态（从 orders 表拉取最新）
       await accessManager.refreshUserPurchaseStatus()
       
-      // 2. 重新拉取免费列表（极端情况：刚登录时当前章节可能改免费了）
-      const config = await accessManager.fetchLatestConfig()
-      this.setData({ freeIds: config.freeChapters })
+      // 2. 重新拉取免费列表、价格与用户推荐人状态
+      const userId = app.globalData.userInfo?.id
+      const [config, purchaseRes] = await Promise.all([
+        accessManager.fetchLatestConfig(),
+        userId ? app.request(`/api/miniprogram/user/purchase-status?userId=${userId}`) : Promise.resolve(null)
+      ])
+      const sectionPrice = config.prices?.section ?? this.data.sectionPrice ?? 1
+      const fullBookPrice = config.prices?.fullbook ?? this.data.fullBookPrice ?? 9.9
+      const userDiscount = config.userDiscount ?? 5
+      const hasReferral = !!(wx.getStorageSync('referral_code') || purchaseRes?.data?.hasReferrer)
+      const hasReferralDiscount = hasReferral && userDiscount > 0
+      const displaySectionPrice = hasReferralDiscount
+        ? Math.round(sectionPrice * (1 - userDiscount / 100) * 100) / 100
+        : sectionPrice
+      const displayFullBookPrice = hasReferralDiscount
+        ? Math.round(fullBookPrice * (1 - userDiscount / 100) * 100) / 100
+        : fullBookPrice
+      this.setData({
+        freeIds: config.freeChapters,
+        sectionPrice,
+        fullBookPrice,
+        userDiscount,
+        hasReferralDiscount,
+        showDiscountHint: userDiscount > 0,
+        displaySectionPrice,
+        displayFullBookPrice,
+        purchasedCount: purchaseRes?.data?.purchasedSections?.length ?? this.data.purchasedCount ?? 0
+      })
       
       // 3. 重新判断当前章节权限
       const newAccessState = await accessManager.determineAccessState(
@@ -1235,9 +1290,33 @@ Page({
     wx.showLoading({ title: '重试中...', mask: true })
     
     try {
-      // 重新拉取配置
-      const config = await accessManager.fetchLatestConfig()
-      this.setData({ freeIds: config.freeChapters })
+      const userId = app.globalData.userInfo?.id
+      const [config, purchaseRes] = await Promise.all([
+        accessManager.fetchLatestConfig(),
+        userId ? app.request(`/api/miniprogram/user/purchase-status?userId=${userId}`) : Promise.resolve(null)
+      ])
+      const sectionPrice = config.prices?.section ?? this.data.sectionPrice ?? 1
+      const fullBookPrice = config.prices?.fullbook ?? this.data.fullBookPrice ?? 9.9
+      const userDiscount = config.userDiscount ?? 5
+      const hasReferral = !!(wx.getStorageSync('referral_code') || purchaseRes?.data?.hasReferrer)
+      const hasReferralDiscount = hasReferral && userDiscount > 0
+      const displaySectionPrice = hasReferralDiscount
+        ? Math.round(sectionPrice * (1 - userDiscount / 100) * 100) / 100
+        : sectionPrice
+      const displayFullBookPrice = hasReferralDiscount
+        ? Math.round(fullBookPrice * (1 - userDiscount / 100) * 100) / 100
+        : fullBookPrice
+      this.setData({
+        freeIds: config.freeChapters,
+        sectionPrice,
+        fullBookPrice,
+        userDiscount,
+        hasReferralDiscount,
+        showDiscountHint: userDiscount > 0,
+        displaySectionPrice,
+        displayFullBookPrice,
+        purchasedCount: purchaseRes?.data?.purchasedSections?.length ?? this.data.purchasedCount ?? 0
+      })
       
       // 重新判断权限
       const newAccessState = await accessManager.determineAccessState(