Backup panel PostgreSQL database as .sql dump (v2.6.2).

Co-authored-by: Cursor <cursoragent@cursor.com>

translations/zh.json

@@ -344,11 +344,13 @@
     "lang_zh":  "中文 (Chinese)",
     "lang_fa":  "فارسی (Persian)",
     "backup_title":  "简易备份",
-    "download_backup":  "下载 data.json",
-    "restore_backup":  "从文件恢复",
-    "restore_confirm":  "您确定吗？当前数据将被覆盖，应用程序将重新启动。",
+    "download_backup":  "下载 PostgreSQL 转储 (.sql)",
+    "download_backup_json":  "导出 JSON（旧版）",
+    "backup_hint":  "面板 PostgreSQL 数据库的完整转储。请使用 .sql 进行完整备份；JSON 用于兼容旧版本。",
+    "restore_backup":  "从 .sql 或 .json 恢复",
+    "restore_confirm":  "恢复将覆盖数据库中所有当前面板数据。",
     "restore_success":  "恢复成功！正在重启...",
-    "invalid_backup_file":  "备份文件无效或结构错误",
+    "invalid_backup_file":  "无效的备份文件（.sql 转储或旧版 data.json）",
     "config_unavailable":  "配置文件不可用",
     "config_unavailable_desc":  "此客户端是通过 Amnezia 原生应用创建的。\\n私钥仅存储在用户设备上，服务器无法恢复。",
     "client_public_key":  "客户端公钥：",