📝 docs(epic-007): 删除重复的Story 39
- 删除Story 39: 租户配置管理界面独立包实现
- 原因：功能已由Story 14（租户管理界面独立包）覆盖
- 更新完成统计：故事总数从39减少到38，总体进度97.4%
- 更新关键成果：移除不存在的mini-payment-mt包
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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>
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