fix: prevent duplicate tray instances on relaunch (#1458)

Author: shm11C3

Cargo.lock

@@ -54,6 +54,7 @@ async-trait = "0.1"
 tauri-plugin-os = "2.3.2"
 tauri-plugin-clipboard-manager = "2.3.2"
 tauri-plugin-opener = "2.5.3"
+tauri-plugin-single-instance = "2.4.2"
 
 [dependencies.uuid]
 version = "1.23.1"

src-tauri/Cargo.toml

@@ -150,6 +150,9 @@ pub fn run() {
 
   let mut tauri_builder = tauri::Builder::<Wry>::default()
     .invoke_handler(builder.invoke_handler())
+    .plugin(tauri_plugin_single_instance::init(|app, _args, _cwd| {
+      lifecycle::on_second_instance(app);
+    }))
     .setup(move |app| {
       let path_resolver = app.path();
 

src-tauri/src/lib.rs

@@ -93,6 +93,11 @@ pub fn on_close_requested(window: &Window) {
   });
 }
 
+/// Hook into second launch attempts while this process is already running.
+pub fn on_second_instance(app: &tauri::AppHandle) {
+  restore_main_window(app);
+}
+
 /// Hook into app-level runtime events that affect the main window lifecycle.
 pub fn on_run_event(app: &tauri::AppHandle, event: tauri::RunEvent) {
   #[cfg(target_os = "macos")]