tun init logic seperation by platforms

client/src/platform/desktop.rs

@@ -0,0 +1,9 @@
+use crate::tun::tun::Tun; // Убедись, что путь к Tun верный
+use std::io;
+
+pub fn setup_platform_routing(tun_device: &Tun, remote_address: &str) -> io::Result<()> {
+    let proxy_ip = remote_address.split(':').next().unwrap_or(remote_address);
+    tun_device.setup_routing(proxy_ip)?;
+    tun_device.setup_dns_redirection()?;
+    Ok(())
+}