diff --git a/desktop/src-tauri/src/main.rs b/desktop/src-tauri/src/main.rs
deleted file mode 100644
index 0ea9255..0000000
--- a/desktop/src-tauri/src/main.rs
+++ /dev/null
@@ -1,250 +0,0 @@
-#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
-
-mod engine;
-
-use engine::CallEngine;
-use serde::Serialize;
-use std::sync::Arc;
-use tauri::Emitter;
-use tokio::sync::Mutex;
-
-#[derive(Clone, Serialize)]
-struct CallEvent {
-    kind: String,
-    message: String,
-}
-
-#[derive(Clone, Serialize)]
-struct Participant {
-    fingerprint: String,
-    alias: Option<String>,
-    relay_label: Option<String>,
-}
-
-#[derive(Clone, Serialize)]
-struct CallStatus {
-    active: bool,
-    mic_muted: bool,
-    spk_muted: bool,
-    participants: Vec<Participant>,
-    encode_fps: u64,
-    recv_fps: u64,
-    audio_level: u32,
-    call_duration_secs: f64,
-    fingerprint: String,
-    tx_codec: String,
-    rx_codec: String,
-}
-
-struct AppState {
-    engine: Mutex<Option<CallEngine>>,
-}
-
-/// Ping result with RTT and server identity hash.
-#[derive(Clone, Serialize)]
-struct PingResult {
-    rtt_ms: u32,
-    /// Server identity: SHA-256 of the QUIC peer certificate, hex-encoded.
-    server_fingerprint: String,
-}
-
-/// Ping a relay to check if it's online, measure RTT, and get server identity.
-#[tauri::command]
-async fn ping_relay(relay: String) -> Result<PingResult, String> {
-    let addr: std::net::SocketAddr = relay.parse().map_err(|e| format!("bad address: {e}"))?;
-    let _ = rustls::crypto::ring::default_provider().install_default();
-    let bind: std::net::SocketAddr = "0.0.0.0:0".parse().unwrap();
-    let endpoint = wzp_transport::create_endpoint(bind, None).map_err(|e| format!("{e}"))?;
-    let client_cfg = wzp_transport::client_config();
-
-    let start = std::time::Instant::now();
-    let conn_result = tokio::time::timeout(
-        std::time::Duration::from_secs(3),
-        wzp_transport::connect(&endpoint, addr, "ping", client_cfg),
-    )
-    .await;
-
-    // Always close endpoint to prevent resource leaks
-    endpoint.close(0u32.into(), b"done");
-
-    match conn_result {
-        Ok(Ok(conn)) => {
-            let rtt_ms = start.elapsed().as_millis() as u32;
-
-            let server_fingerprint = conn
-                .peer_identity()
-                .and_then(|id| id.downcast::<Vec<rustls::pki_types::CertificateDer>>().ok())
-                .and_then(|certs| certs.first().map(|c| {
-                    use std::hash::{Hash, Hasher};
-                    let mut hasher = std::collections::hash_map::DefaultHasher::new();
-                    c.as_ref().hash(&mut hasher);
-                    let h = hasher.finish();
-                    format!("{h:016x}")
-                }))
-                .unwrap_or_else(|| {
-                    format!("{:x}", addr.ip().to_string().len() as u64 * 0x9e3779b97f4a7c15 + addr.port() as u64)
-                });
-
-            conn.close(0u32.into(), b"ping");
-            Ok(PingResult { rtt_ms, server_fingerprint })
-        }
-        Ok(Err(e)) => Err(format!("{e}")),
-        Err(_) => Err("timeout (3s)".into()),
-    }
-}
-
-/// Read fingerprint from ~/.wzp/identity without connecting.
-#[tauri::command]
-fn get_identity() -> Result<String, String> {
-    let home = std::env::var("HOME").unwrap_or_else(|_| ".".into());
-    let path = std::path::PathBuf::from(home).join(".wzp").join("identity");
-    if path.exists() {
-        if let Ok(hex) = std::fs::read_to_string(&path) {
-            if let Ok(seed) = wzp_crypto::Seed::from_hex(hex.trim()) {
-                let fp = seed.derive_identity().public_identity().fingerprint;
-                return Ok(fp.to_string());
-            }
-        }
-    }
-    // No identity yet — generate one so we can show the fingerprint
-    let seed = wzp_crypto::Seed::generate();
-    let fp = seed.derive_identity().public_identity().fingerprint;
-    if let Some(parent) = path.parent() {
-        std::fs::create_dir_all(parent).ok();
-    }
-    let hex: String = seed.0.iter().map(|b| format!("{b:02x}")).collect();
-    std::fs::write(&path, hex).ok();
-    Ok(fp.to_string())
-}
-
-#[tauri::command]
-async fn connect(
-    state: tauri::State<'_, Arc<AppState>>,
-    app: tauri::AppHandle,
-    relay: String,
-    room: String,
-    alias: String,
-    os_aec: bool,
-    quality: String,
-) -> Result<String, String> {
-    let mut engine_lock = state.engine.lock().await;
-    if engine_lock.is_some() {
-        return Err("already connected".into());
-    }
-
-    let app_clone = app.clone();
-    match CallEngine::start(relay, room, alias, os_aec, quality, move |event_kind, message| {
-        let _ = app_clone.emit(
-            "call-event",
-            CallEvent {
-                kind: event_kind.to_string(),
-                message: message.to_string(),
-            },
-        );
-    })
-    .await
-    {
-        Ok(eng) => {
-            *engine_lock = Some(eng);
-            Ok("connected".into())
-        }
-        Err(e) => Err(format!("{e}")),
-    }
-}
-
-#[tauri::command]
-async fn disconnect(state: tauri::State<'_, Arc<AppState>>) -> Result<String, String> {
-    let mut engine_lock = state.engine.lock().await;
-    if let Some(engine) = engine_lock.take() {
-        engine.stop().await;
-        Ok("disconnected".into())
-    } else {
-        Err("not connected".into())
-    }
-}
-
-#[tauri::command]
-async fn toggle_mic(state: tauri::State<'_, Arc<AppState>>) -> Result<bool, String> {
-    let engine_lock = state.engine.lock().await;
-    if let Some(ref engine) = *engine_lock {
-        Ok(engine.toggle_mic())
-    } else {
-        Err("not connected".into())
-    }
-}
-
-#[tauri::command]
-async fn toggle_speaker(state: tauri::State<'_, Arc<AppState>>) -> Result<bool, String> {
-    let engine_lock = state.engine.lock().await;
-    if let Some(ref engine) = *engine_lock {
-        Ok(engine.toggle_speaker())
-    } else {
-        Err("not connected".into())
-    }
-}
-
-#[tauri::command]
-async fn get_status(state: tauri::State<'_, Arc<AppState>>) -> Result<CallStatus, String> {
-    let engine_lock = state.engine.lock().await;
-    if let Some(ref engine) = *engine_lock {
-        let status = engine.status().await;
-        Ok(CallStatus {
-            active: true,
-            mic_muted: status.mic_muted,
-            spk_muted: status.spk_muted,
-            participants: status
-                .participants
-                .into_iter()
-                .map(|p| Participant {
-                    fingerprint: p.fingerprint,
-                    alias: p.alias,
-                    relay_label: p.relay_label,
-                })
-                .collect(),
-            encode_fps: status.frames_sent,
-            recv_fps: status.frames_received,
-            audio_level: status.audio_level,
-            call_duration_secs: status.call_duration_secs,
-            fingerprint: status.fingerprint,
-            tx_codec: status.tx_codec,
-            rx_codec: status.rx_codec,
-        })
-    } else {
-        Ok(CallStatus {
-            active: false,
-            mic_muted: false,
-            spk_muted: false,
-            participants: vec![],
-            encode_fps: 0,
-            recv_fps: 0,
-            audio_level: 0,
-            call_duration_secs: 0.0,
-            fingerprint: String::new(),
-            tx_codec: String::new(),
-            rx_codec: String::new(),
-        })
-    }
-}
-
-fn main() {
-    tracing_subscriber::fmt().init();
-
-    let state = Arc::new(AppState {
-        engine: Mutex::new(None),
-    });
-
-    tauri::Builder::default()
-        .plugin(tauri_plugin_shell::init())
-        .manage(state)
-        .invoke_handler(tauri::generate_handler![
-            ping_relay,
-            get_identity,
-            connect,
-            disconnect,
-            toggle_mic,
-            toggle_speaker,
-            get_status,
-        ])
-        .run(tauri::generate_context!())
-        .expect("error while running WarzonePhone Desktop");
-}