refactor: reorganize feat.rs into modular structure (#2827)

Split the monolithic feat.rs file into specialized modules:
- backup.rs: WebDAV backup and restore functions
- clash.rs: Core management and testing functions
- config.rs: Configuration handling
- profile.rs: Profile management
- proxy.rs: Proxy and TUN mode controls
- window.rs: Dashboard window management

This improves code organization, readability, and maintainability
by grouping related functionality into logical modules.

src-tauri/src/feat/proxy.rs

@@ -0,0 +1,87 @@
+use crate::config::Config;
+use crate::config::IVerge;
+use crate::core::handle;
+use std::env;
+use tauri_plugin_clipboard_manager::ClipboardExt;
+
+/// Toggle system proxy on/off
+pub fn toggle_system_proxy() {
+    let enable = Config::verge().draft().enable_system_proxy;
+    let enable = enable.unwrap_or(false);
+
+    tauri::async_runtime::spawn(async move {
+        match super::patch_verge(
+            IVerge {
+                enable_system_proxy: Some(!enable),
+                ..IVerge::default()
+            },
+            false,
+        )
+        .await
+        {
+            Ok(_) => handle::Handle::refresh_verge(),
+            Err(err) => log::error!(target: "app", "{err}"),
+        }
+    });
+}
+
+/// Toggle TUN mode on/off
+pub fn toggle_tun_mode(not_save_file: Option<bool>) {
+    let enable = Config::verge().data().enable_tun_mode;
+    let enable = enable.unwrap_or(false);
+
+    tauri::async_runtime::spawn(async move {
+        match super::patch_verge(
+            IVerge {
+                enable_tun_mode: Some(!enable),
+                ..IVerge::default()
+            },
+            not_save_file.unwrap_or(false),
+        )
+        .await
+        {
+            Ok(_) => handle::Handle::refresh_verge(),
+            Err(err) => log::error!(target: "app", "{err}"),
+        }
+    });
+}
+
+/// Copy proxy environment variables to clipboard
+pub fn copy_clash_env() {
+    // 从环境变量获取IP地址，默认127.0.0.1
+    let clash_verge_rev_ip =
+        env::var("CLASH_VERGE_REV_IP").unwrap_or_else(|_| "127.0.0.1".to_string());
+
+    let app_handle = handle::Handle::global().app_handle().unwrap();
+    let port = { Config::verge().latest().verge_mixed_port.unwrap_or(7897) };
+    let http_proxy = format!("http://{clash_verge_rev_ip}:{}", port);
+    let socks5_proxy = format!("socks5://{clash_verge_rev_ip}:{}", port);
+
+    let sh =
+        format!("export https_proxy={http_proxy} http_proxy={http_proxy} all_proxy={socks5_proxy}");
+    let cmd: String = format!("set http_proxy={http_proxy}\r\nset https_proxy={http_proxy}");
+    let ps: String = format!("$env:HTTP_PROXY=\"{http_proxy}\"; $env:HTTPS_PROXY=\"{http_proxy}\"");
+    let nu: String =
+        format!("load-env {{ http_proxy: \"{http_proxy}\", https_proxy: \"{http_proxy}\" }}");
+
+    let cliboard = app_handle.clipboard();
+    let env_type = { Config::verge().latest().env_type.clone() };
+    let env_type = match env_type {
+        Some(env_type) => env_type,
+        None => {
+            #[cfg(not(target_os = "windows"))]
+            let default = "bash";
+            #[cfg(target_os = "windows")]
+            let default = "powershell";
+
+            default.to_string()
+        }
+    };
+    match env_type.as_str() {
+        "bash" => cliboard.write_text(sh).unwrap_or_default(),
+        "cmd" => cliboard.write_text(cmd).unwrap_or_default(),
+        "powershell" => cliboard.write_text(ps).unwrap_or_default(),
+        "nushell" => cliboard.write_text(nu).unwrap_or_default(),
+        _ => log::error!(target: "app", "copy_clash_env: Invalid env type! {env_type}"),
+    };
+}