v1.7.0: dual-pane SFTP file manager

Replace primitive upload/download form with a full dual-pane file manager
(local + remote) featuring directory browsing, navigation history,
file operations (upload, download, mkdir, delete, rename), progress
tracking, and persistent SFTP sessions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/i18n.py

@@ -247,6 +247,34 @@ _EN = {
     # Network interface
     "network_interface": "Network Interface",
     "auto_default": "Auto (default)",
+
+    # File browser
+    "file_browser": "File Browser",
+    "local_files": "Local",
+    "remote_files": "Remote",
+    "connect_to_browse": "Select a server to browse files",
+    "connecting_sftp": "Connecting...",
+    "connected_sftp": "Connected to {alias}",
+    "disconnected_sftp": "Disconnected",
+    "sftp_error": "SFTP error: {e}",
+    "uploading": "Uploading: {name}",
+    "downloading": "Downloading: {name}",
+    "transfer_done": "Transfer complete: {name}",
+    "transfer_failed": "Transfer failed: {e}",
+    "new_folder": "New Folder",
+    "new_folder_name": "Folder name:",
+    "delete_files": "Delete",
+    "delete_files_confirm": "Delete {count} item(s)?",
+    "rename_file": "Rename",
+    "rename_prompt": "New name:",
+    "permission_denied": "Permission denied: {path}",
+    "name_col": "Name",
+    "size_col": "Size",
+    "date_col": "Date",
+    "perm_col": "Perm",
+    "parent_dir": "Parent directory",
+    "refresh_files": "Refresh",
+    "items_count": "{count} items",
 }
 
 _RU = {
@@ -471,6 +499,34 @@ _RU = {
     # Network interface
     "network_interface": "Сетевой интерфейс",
     "auto_default": "Авто (по умолчанию)",
+
+    # File browser
+    "file_browser": "Файл-менеджер",
+    "local_files": "Локальные",
+    "remote_files": "Удалённые",
+    "connect_to_browse": "Выберите сервер для просмотра файлов",
+    "connecting_sftp": "Подключение...",
+    "connected_sftp": "Подключено к {alias}",
+    "disconnected_sftp": "Отключено",
+    "sftp_error": "Ошибка SFTP: {e}",
+    "uploading": "Загрузка: {name}",
+    "downloading": "Скачивание: {name}",
+    "transfer_done": "Передача завершена: {name}",
+    "transfer_failed": "Ошибка передачи: {e}",
+    "new_folder": "Новая папка",
+    "new_folder_name": "Имя папки:",
+    "delete_files": "Удалить",
+    "delete_files_confirm": "Удалить {count} элемент(ов)?",
+    "rename_file": "Переименовать",
+    "rename_prompt": "Новое имя:",
+    "permission_denied": "Нет доступа: {path}",
+    "name_col": "Имя",
+    "size_col": "Размер",
+    "date_col": "Дата",
+    "perm_col": "Права",
+    "parent_dir": "Родительская папка",
+    "refresh_files": "Обновить",
+    "items_count": "{count} элементов",
 }
 
 _ZH = {
@@ -695,6 +751,34 @@ _ZH = {
     # Network interface
     "network_interface": "网络接口",
     "auto_default": "自动（默认）",
+
+    # File browser
+    "file_browser": "文件管理器",
+    "local_files": "本地",
+    "remote_files": "远程",
+    "connect_to_browse": "选择服务器以浏览文件",
+    "connecting_sftp": "连接中...",
+    "connected_sftp": "已连接到 {alias}",
+    "disconnected_sftp": "已断开",
+    "sftp_error": "SFTP错误：{e}",
+    "uploading": "上传中：{name}",
+    "downloading": "下载中：{name}",
+    "transfer_done": "传输完成：{name}",
+    "transfer_failed": "传输失败：{e}",
+    "new_folder": "新建文件夹",
+    "new_folder_name": "文件夹名称：",
+    "delete_files": "删除",
+    "delete_files_confirm": "删除 {count} 个项目？",
+    "rename_file": "重命名",
+    "rename_prompt": "新名称：",
+    "permission_denied": "权限被拒绝：{path}",
+    "name_col": "名称",
+    "size_col": "大小",
+    "date_col": "日期",
+    "perm_col": "权限",
+    "parent_dir": "上级目录",
+    "refresh_files": "刷新",
+    "items_count": "{count} 个项目",
 }
 
 _TRANSLATIONS = {