[细粒度PR] 设置页面与偏好项后台任务接线 - #2563
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April 30, 2026 11:35
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目标
将下载设置 Fragment 和偏好项升级为调用后台任务体系，支持清理冗余、合并重复、重建记录等操作。
变更
DownloadFragment.java— 将操作改为通过BackgroundTaskManager.submitBackgroundTask提交AdvancedFragment.java— 导出/导入、转储日志等高级功能接入后台任务CleanRedundancyPreference2、CleanRedundancyPreference3— 增量清理偏好项MergeDuplicateGalleryPreference— 手动触发合并偏好项（直接依赖版）RebuildDownloadRecordsPreference— 重建下载记录偏好项CleanRedundancyPreference— 复用后台任务架构依赖