fix: improve app identification in task managers

Set GTK_APPLICATION_ID for proper WM_CLASS and add desktop template
with StartupWMClass for correct process identification on Linux.
Also add window label for Tauri window configuration.

src-tauri/src/main.rs

@@ -22,6 +22,16 @@ fn is_nvidia_gpu() -> bool {
 }
 
 fn main() {
+    // Set the application name/class for Linux window managers
+    // This helps task managers and window switchers identify the app correctly
+    #[cfg(target_os = "linux")]
+    {
+        // Set program name (affects WM_CLASS)
+        std::env::set_var("GTK_APPLICATION_ID", "com.blitzfc.qbz");
+        // GLib program name helps with process identification
+        // This is set before any GTK initialization
+    }
+
     // Use xdg-desktop-portal for file dialogs on Linux
     // This makes GTK apps use native file pickers (e.g., KDE's on Plasma)
     #[cfg(target_os = "linux")]

src-tauri/tauri.conf.json

@@ -12,6 +12,7 @@
   "app": {
     "windows": [
       {
+        "label": "main",
         "title": "QBZ",
         "width": 1280,
         "height": 800,

src-tauri/templates/app.desktop

@@ -0,0 +1,14 @@
+[Desktop Entry]
+Name={{name}}
+{{#if comment}}
+Comment={{comment}}
+{{/if}}
+Exec={{exec}}
+Type=Application
+Icon={{icon}}
+Categories={{categories}}
+Terminal=false
+StartupWMClass=com.blitzfc.qbz
+StartupNotify=true
+Keywords=music;audio;qobuz;hifi;streaming;audiophile;flac;
+MimeType=x-scheme-handler/qbz;