feat: 新增备份恢复功能 & 改进图片上传体验

- 新增备份管理页面(备份/恢复/下载/删除)
- 新增 backup_service 服务层
- 文章编辑器增加工具栏图片上传按钮
- 优化图片上传交互提示
This commit is contained in:
2026-07-16 16:38:38 +08:00
parent 503a9780b2
commit df2f0860b5
9 changed files with 614 additions and 30 deletions
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