Add server user/protocol migrate export-import for connect_domain moves.

translations/zh.json

@@ -399,6 +399,20 @@
     "server_ssl_hint":  "安装 Hysteria / NGINX 时自动填入（Let\u0027s Encrypt）。",
     "server_connect_domain":  "客户端连接域名",
     "server_connect_domain_hint":  "在 VPN 配置中替代 IP 使用。迁移服务器时只需更新 DNS A 记录。",
+    "migrate_title":  "Migrate users",
+    "migrate_desc":  "Move clients to a new server with the same domain",
+    "migrate_hint":  "Export keeps users, bindings and protocol state. On the new server install the same protocols, import the ZIP, then update DNS.",
+    "migrate_export_label":  "Export from this server",
+    "migrate_export_btn":  "Download migration pack (.zip)",
+    "migrate_exporting":  "Building migration pack…",
+    "migrate_export_done":  "Migration pack downloaded",
+    "migrate_import_label":  "Import onto this server",
+    "migrate_import_btn":  "Import migration pack (.zip)",
+    "migrate_import_hint":  "Install the same protocols first. Do not use Move Connections.",
+    "migrate_import_confirm":  "Import users and protocol state onto this server?",
+    "migrate_importing":  "Importing migration…",
+    "migrate_import_done":  "Migration imported",
+    "migrate_dns_hint":  "Update the DNS A-record for domain",
     "container_logs":  "容器日志",
     "logs_btn":  "📋 日志",
     "logs_live":  "实时",