更新小程序API路径，统一为/api/miniprogram前缀，确保与后端一致性。同时，调整微信支付相关配置，增强系统的灵活性和可维护性。

miniprogram/utils/chapterAccessManager.js

@@ -22,7 +22,7 @@ class ChapterAccessManager {
    */
   async fetchLatestConfig() {
     try {
-      const res = await app.request('/api/db/config', { timeout: 3000 })
+      const res = await app.request('/api/miniprogram/config', { timeout: 3000 })
       if (res.success && res.freeChapters) {
         return {
           freeChapters: res.freeChapters,
@@ -70,7 +70,7 @@ class ChapterAccessManager {
 
       // 3. 请求服务端校验是否已购买（带重试）
       const res = await this.requestWithRetry(
-        `/api/user/check-purchased?userId=${encodeURIComponent(userId)}&type=section&productId=${encodeURIComponent(sectionId)}`,
+        `/api/miniprogram/user/check-purchased?userId=${encodeURIComponent(userId)}&type=section&productId=${encodeURIComponent(sectionId)}`,
         { timeout: 5000 },
         2 // 最多重试2次
       )
@@ -145,7 +145,7 @@ class ChapterAccessManager {
     if (!userId) return
     
     try {
-      const res = await app.request(`/api/user/purchase-status?userId=${encodeURIComponent(userId)}`)
+      const res = await app.request(`/api/miniprogram/user/purchase-status?userId=${encodeURIComponent(userId)}`)
       
       if (res.success && res.data) {
         app.globalData.hasFullBook = res.data.hasFullBook || false