Add single instance plugin

src-tauri/Cargo.toml

@@ -29,6 +29,7 @@ window-vibrancy = "0.7.1"
 windows-version = "0.1.7"
 
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
+tauri-plugin-single-instance = "2"
 tauri-plugin-window-state = "2"
 
 [profile.release]

src-tauri/src/lib.rs

@@ -163,6 +163,11 @@ fn reset_scan(state: State<'_, AppState>) {
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
+        .plugin(tauri_plugin_single_instance::init(|app, _args, _cwd| {
+            if let Some(window) = app.get_webview_window("main") {
+                let _ = window.set_focus();
+            }
+        }))
         .plugin(tauri_plugin_window_state::Builder::new().build())
         .plugin(tauri_plugin_prevent_default::init())
         .plugin(tauri_plugin_opener::init())