fix(dbbackup): 缺 MinecraftServer 导出时重试、CLI 失败退出、面板与 watchdog 告警，异地快照要求完整

panel/src/i18n/resources/zh-CN/admin.json

@@ -116,6 +116,7 @@
   "dbbackup_status_ok": "正常",
   "dbbackup_status_stale": "已过期",
   "dbbackup_status_never": "从未备份",
+  "dbbackup_status_incomplete": "不完整",
   "dbbackup_refresh": "刷新",
   "dbbackup_loading": "正在读取备份状态…",
   "dbbackup_field_when": "最近一次备份",
@@ -126,9 +127,12 @@
   "dbbackup_label_daily": "每日定时",
   "dbbackup_label_pre_migrate": "升级前快照",
   "dbbackup_label_pre_restore": "恢复前快照",
+  "dbbackup_label_offsite": "异地复制快照",
   "dbbackup_label_manual": "手动",
   "dbbackup_never_title": "还没有记录到任何数据库备份",
   "dbbackup_stale_title": "最近一次备份已超过 {{hours}} 小时",
+  "dbbackup_servers_title": "最近一次备份缺少服务器定义",
+  "dbbackup_servers_hint": "备份时集群没有响应。用它恢复能找回账号和数据库，但一台服务器都不会有。等集群恢复响应后，在主机上重新备份一次：",
   "dbbackup_fix_hint": "此时主机出故障，账号、服务器归属和存档索引都无法恢复。在主机上立即备份一次，再查看定时任务日志找出它没有运行的原因：",
   "dbbackup_copy": "复制命令",
   "dbbackup_offsite_note": "备份只保存在这台主机上，硬盘损坏或主机丢失时会一起丢失。请定期把备份目录复制到另一台机器；恢复与灾备步骤见故障排查文档 §16。",