Feature request: Add delete confirmation dialog to file manager (#344)

* Feature request: Add delete confirmation dialog to file manager

- Added confirmation dialog before deleting files/folders
- Users must confirm deletion with a warning message
- Works for both Delete key and right-click delete
- Shows different messages for single file, folder, or multiple items
- Includes permanent deletion warning
- Follows existing design patterns using confirmWithToast

* Adds confirmation for deletion of items including folders

Updates the file deletion confirmation logic to distinguish between
deleting multiple items with or without folders. Introduces a new
translation string for a clearer user prompt when folders and their
contents are included in the deletion.

Improves clarity and reduces user error when performing bulk deletions.

* feat: Add Chinese translations for delete confirmation messages

src/locales/en/translation.json

@@ -844,8 +844,13 @@
     "selectServerToEdit": "Select a server from the sidebar to start editing files",
     "fileOperations": "File Operations",
     "confirmDeleteMessage": "Are you sure you want to delete <strong>{{name}}</strong>?",
+    "confirmDeleteSingleItem": "Are you sure you want to permanently delete \"{{name}}\"?",
+    "confirmDeleteMultipleItems": "Are you sure you want to permanently delete {{count}} items?",
+    "confirmDeleteMultipleItemsWithFolders": "Are you sure you want to permanently delete {{count}} items? This includes folders and their contents.",
+    "confirmDeleteFolder": "Are you sure you want to permanently delete the folder \"{{name}}\" and all its contents?",
     "deleteDirectoryWarning": "This will delete the folder and all its contents.",
     "actionCannotBeUndone": "This action cannot be undone.",
+    "permanentDeleteWarning": "This action cannot be undone. The item(s) will be permanently deleted from the server.",
     "recent": "Recent",
     "pinned": "Pinned",
     "folderShortcuts": "Folder Shortcuts",

src/locales/zh/translation.json

@@ -852,8 +852,13 @@
     "selectServerToEdit": "从侧边栏选择服务器以开始编辑文件",
     "fileOperations": "文件操作",
     "confirmDeleteMessage": "确定要删除 <strong>{{name}}</strong> 吗？",
+    "confirmDeleteSingleItem": "确定要永久删除 \"{{name}}\" 吗？",
+    "confirmDeleteMultipleItems": "确定要永久删除 {{count}} 个项目吗？",
+    "confirmDeleteMultipleItemsWithFolders": "确定要永久删除 {{count}} 个项目吗？这包括文件夹及其内容。",
+    "confirmDeleteFolder": "确定要永久删除文件夹 \"{{name}}\" 及其所有内容吗？",
     "deleteDirectoryWarning": "这将删除文件夹及其所有内容。",
     "actionCannotBeUndone": "此操作无法撤销。",
+    "permanentDeleteWarning": "此操作无法撤销。项目将从服务器永久删除。",
     "dragSystemFilesToUpload": "拖拽系统文件到此处上传",
     "dragFilesToWindowToDownload": "拖拽文件到窗口外下载",
     "openTerminalHere": "在此处打开终端",