refactor: rename cmds module to cmd for better consistency (#2830)

- Renamed `cmds` module to `cmd` for better naming consistency
- Reorganized command modules into separate files under src/cmd/
- Updated all imports and references to use the new module name
- Fixed missing dependency in webdav.rs to reference core::backup
- Updated tray module to use new cmd namespace
- Improved uwp.rs module structure using platform-specific implementations
- Removed unnecessary imports from various command files

src-tauri/src/cmd/webdav.rs

@@ -0,0 +1,51 @@
+use crate::{
+    core,
+    config::*,
+    feat,
+    wrap_err,
+};
+use super::CmdResult;
+use reqwest_dav::list_cmd::ListFile;
+
+/// 保存 WebDAV 配置
+#[tauri::command]
+pub async fn save_webdav_config(url: String, username: String, password: String) -> CmdResult<()> {
+    let patch = IVerge {
+        webdav_url: Some(url),
+        webdav_username: Some(username),
+        webdav_password: Some(password),
+        ..IVerge::default()
+    };
+    Config::verge().draft().patch_config(patch.clone());
+    Config::verge().apply();
+    Config::verge()
+        .data()
+        .save_file()
+        .map_err(|err| err.to_string())?;
+    core::backup::WebDavClient::global().reset();
+    Ok(())
+}
+
+/// 创建 WebDAV 备份并上传
+#[tauri::command]
+pub async fn create_webdav_backup() -> CmdResult<()> {
+    wrap_err!(feat::create_backup_and_upload_webdav().await)
+}
+
+/// 列出 WebDAV 上的备份文件
+#[tauri::command]
+pub async fn list_webdav_backup() -> CmdResult<Vec<ListFile>> {
+    wrap_err!(feat::list_wevdav_backup().await)
+}
+
+/// 删除 WebDAV 上的备份文件
+#[tauri::command]
+pub async fn delete_webdav_backup(filename: String) -> CmdResult<()> {
+    wrap_err!(feat::delete_webdav_backup(filename).await)
+}
+
+/// 从 WebDAV 恢复备份文件
+#[tauri::command]
+pub async fn restore_webdav_backup(filename: String) -> CmdResult<()> {
+    wrap_err!(feat::restore_webdav_backup(filename).await)
+}