fix: remove compiler warnings for unused imports, variables, and irrefutable patterns

- Remove unused CommandExt import in app_server.rs
- Prefix unused cfg-gated variables with underscore (lib.rs event, tailscale command)
- Replace irrefutable let...else with plain let in remote_backend tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: AndrewMoryakov

src-tauri/src/backend/app_server.rs

@@ -19,8 +19,6 @@ use crate::types::WorkspaceEntry;
 
 #[cfg(target_os = "windows")]
 use crate::shared::process_core::{build_cmd_c_command, resolve_windows_executable};
-#[cfg(target_os = "windows")]
-use std::os::windows::process::CommandExt;
 
 fn extract_thread_id(value: &Value) -> Option<String> {
     fn extract_from_container(container: Option<&Value>) -> Option<String> {

src-tauri/src/lib.rs

@@ -102,12 +102,12 @@ pub fn run() {
     let builder = tauri::Builder::default();
 
     let builder = builder
-        .on_window_event(|window, event| {
+        .on_window_event(|window, _event| {
             if window.label() != "main" {
                 return;
             }
             #[cfg(target_os = "macos")]
-            if let WindowEvent::CloseRequested { api, .. } = event {
+            if let WindowEvent::CloseRequested { api, .. } = _event {
                 api.prevent_close();
                 let _ = window.hide();
             }

src-tauri/src/remote_backend/mod.rs

@@ -273,9 +273,7 @@ mod tests {
         settings.remote_backend_host = "tcp.example:4732".to_string();
 
         let config = resolve_transport_config(&settings).expect("transport config");
-        let RemoteTransportConfig::Tcp { host, .. } = config else {
-            panic!("expected tcp transport config");
-        };
+        let RemoteTransportConfig::Tcp { host, .. } = config;
         assert_eq!(host, "tcp.example:4732");
     }
 
@@ -304,9 +302,7 @@ mod tests {
         settings.active_remote_backend_id = Some("staging".to_string());
 
         let config = resolve_transport_config(&settings).expect("transport config");
-        let RemoteTransportConfig::Tcp { host, auth_token } = config else {
-            panic!("expected tcp transport config");
-        };
+        let RemoteTransportConfig::Tcp { host, auth_token } = config;
         assert_eq!(host, "staging.example:4732");
         assert!(auth_token.is_none());
     }
@@ -318,9 +314,7 @@ mod tests {
         settings.active_remote_backend_id = Some("nonexistent".to_string());
 
         let config = resolve_transport_config(&settings).expect("transport config");
-        let RemoteTransportConfig::Tcp { host, .. } = config else {
-            panic!("expected tcp transport config");
-        };
+        let RemoteTransportConfig::Tcp { host, .. } = config;
         assert_eq!(host, "fallback:4732");
     }
 

src-tauri/src/tailscale/mod.rs

@@ -26,7 +26,7 @@ use self::core as tailscale_core;
 #[cfg(any(target_os = "android", target_os = "ios"))]
 const UNSUPPORTED_MESSAGE: &str = "Tailscale integration is only available on desktop.";
 
-fn apply_tailscale_command_env(command: &mut tokio::process::Command) {
+fn apply_tailscale_command_env(_command: &mut tokio::process::Command) {
     #[cfg(target_os = "macos")]
     {
         // The app-bundled Tailscale binary can fail with CLIError 3 when TERM is missing