优化章节读取逻辑，优先从数据库获取章节数据并处理最新的 isFree 状态；改进用户行为轨迹和绑定关系加载，增加错误处理和用户提示。

app/read/[id]/page.tsx

@@ -2,6 +2,7 @@ import { notFound } from "next/navigation"
 import { ChapterContent } from "@/components/chapter-content"
 import { getSectionBySlug, getChapterBySectionSlug } from "@/lib/book-file-system"
 import { specialSections, getSectionById } from "@/lib/book-data"
+import { query } from "@/lib/db"
 
 interface ReadPageProps {
   params: Promise<{ id: string }>
@@ -10,6 +11,35 @@ interface ReadPageProps {
 export const dynamic = "force-dynamic"
 export const runtime = "nodejs"
 
+// 从数据库获取章节数据（包含最新的 isFree 状态）
+async function getChapterFromDB(id: string) {
+  try {
+    const results = await query(
+      `SELECT id, part_title, chapter_title, section_title, content, is_free, price 
+       FROM chapters 
+       WHERE id = ? AND status = 'published'`,
+      [id]
+    ) as any[]
+    
+    if (results && results.length > 0) {
+      const chapter = results[0]
+      return {
+        id: chapter.id,
+        title: chapter.section_title,
+        price: chapter.price || 1,
+        isFree: chapter.is_free === 1 || chapter.price === 0,
+        filePath: '',
+        content: chapter.content,
+        partTitle: chapter.part_title,
+        chapterTitle: chapter.chapter_title,
+      }
+    }
+  } catch (error) {
+    console.error("[ReadPage] 从数据库获取章节失败:", error)
+  }
+  return null
+}
+
 export default async function ReadPage({ params }: ReadPageProps) {
   const { id } = await params
 
@@ -29,7 +59,17 @@ export default async function ReadPage({ params }: ReadPageProps) {
   }
 
   try {
-    // 先从文件系统获取
+    // 🔥 优先从数据库获取（包含最新的 isFree 状态）
+    const dbChapter = await getChapterFromDB(id)
+    if (dbChapter) {
+      return <ChapterContent 
+        section={dbChapter as any} 
+        partTitle={dbChapter.partTitle || ""} 
+        chapterTitle={dbChapter.chapterTitle || ""} 
+      />
+    }
+
+    // 如果数据库没有，再从文件系统获取（兼容旧数据）
     const section = getSectionBySlug(id)
     if (section) {
       const context = getChapterBySectionSlug(id)
@@ -38,7 +78,7 @@ export default async function ReadPage({ params }: ReadPageProps) {
       }
     }
 
-    // 再从book-data获取
+    // 最后从 book-data 获取
     const bookSection = getSectionById(id)
     if (bookSection) {
       return <ChapterContent section={bookSection as any} partTitle="" chapterTitle="" />