feat(miniprogram): 用 karuo-316 替换小程序目录

- 从 github/karuo-316 覆盖 miniprogram/
- 排除 project.private.config.json 与 *.backup

Made-with: Cursor

miniprogram/utils/readingTracker.js

@@ -170,10 +170,10 @@ class ReadingTracker {
     const userId = app.globalData.userInfo?.id
     if (!userId) return
     
-    // 计算本次上报的时长（仅发送增量 delta，后端会累加，避免重复累加导致阅读分钟数异常）
+    // 计算本次上报的时长
     const now = Date.now()
-    const delta = Math.round((now - this.activeTracker.lastScrollTime) / 1000)
-    this.activeTracker.totalDuration += delta
+    const duration = Math.round((now - this.activeTracker.lastScrollTime) / 1000)
+    this.activeTracker.totalDuration += duration
     this.activeTracker.lastScrollTime = now
     
     try {
@@ -183,7 +183,7 @@ class ReadingTracker {
           userId,
           sectionId: this.activeTracker.sectionId,
           progress: this.activeTracker.maxProgress,
-          duration: Math.max(0, delta),
+          duration: this.activeTracker.totalDuration,
           status: this.activeTracker.isCompleted ? 'completed' : 'reading',
           completedAt: this.activeTracker.completedAt
         }