优化小程序阅读页面逻辑，动态更新章节价格和免费状态，确保用户体验流畅。移除硬编码价格，支持通过接口返回的值进行展示。更新用户地址管理逻辑，简化获取地址的流程，提升代码可读性。

miniprogram/pages/read/read.js

@@ -250,15 +250,18 @@ Page({
         if (accessManager.canAccessFullContent(accessState)) {
           app.markSectionAsRead(id)
         }
+        // 始终用接口返回的 price/isFree 更新 section（不写死 1 元）
+        const section = this.data.section || {}
+        if (res.price !== undefined && res.price !== null) section.price = Number(res.price)
+        if (res.isFree !== undefined) section.isFree = !!res.isFree
         // 0元即免费：接口返回 price 为 0 或 isFree 为 true 时，不展示付费墙
         const isFreeByPrice = res.price === 0 || res.price === '0' || Number(res.price) === 0
         const isFreeByFlag = res.isFree === true
         if (isFreeByPrice || isFreeByFlag) {
-          const section = this.data.section || {}
-          if (res.price !== undefined && res.price !== null) section.price = Number(res.price)
-          if (res.isFree !== undefined) section.isFree = !!res.isFree
           this.setData({ section, showPaywall: false, canAccess: true, accessState: 'free' })
           app.markSectionAsRead(id)
+        } else {
+          this.setData({ section })
         }
         setTimeout(() => this.drawShareCard(), 600)
       }
@@ -304,12 +307,12 @@ Page({
       return { id, title: appendixTitles[id] || '附录', isFree: true, price: 0 }
     }
     
-    // 普通章节
+    // 普通章节：price 不写死，由 loadContent 从 config/接口 填充
     return {
       id: id,
       title: this.getSectionTitle(id),
       isFree: id === '1.1',
-      price: 1
+      price: undefined
     }
   },
 
@@ -710,7 +713,7 @@ Page({
       return
     }
     
-    const price = this.data.section?.price || 1
+    const price = this.data.section?.price ?? this.data.sectionPrice ?? 1
     console.log('[Pay] 开始支付流程:', { sectionId: this.data.sectionId, price })
     wx.hideLoading()
     await this.processPayment('section', this.data.sectionId, price)