fix(desktop): abstract open_folder across platforms and clean up native_window.h

desktop/app/cpp/native_window.h

@@ -18,7 +18,6 @@ class NativeWindow : public QQuickWindow
     Q_OBJECT
     QML_ELEMENT
 
-
     // Show Mica behind transparent areas.
     Q_PROPERTY(bool backdrop READ backdrop WRITE setBackdrop NOTIFY backdropChanged)
     // Use Windows 11 Desktop Acrylic (DWMSBT_TRANSIENTWINDOW) when backdrop is active (for Liquid Glass theme).

desktop/app/src/bridge/photo_backup.rs

@@ -158,7 +158,7 @@ impl qobject::PhotoBackup {
         let name = core_host::host().hub.read(|s| s.name_of(&id)).unwrap_or_default();
         let folder = photo_backup::summary(id, &name).folder;
         if std::fs::create_dir_all(&folder).is_ok()
-            && let Err(e) = std::process::Command::new("explorer.exe").arg(&folder).spawn()
+            && let Err(e) = crate::win::shell::open_folder(&folder)
         {
             tracing::warn!(error = %e, "can't open the photo backup folder");
         }

desktop/app/src/mac/shell.rs

@@ -71,6 +71,11 @@ pub fn sleep() -> Result<(), String> {
     std::process::Command::new("pmset").arg("sleepnow").spawn().map(|_| ()).map_err(|e| e.to_string())
 }
 
+/// Opens a directory in Finder.
+pub fn open_folder(path: &Path) -> Result<(), String> {
+    std::process::Command::new("open").arg(path).spawn().map(|_| ()).map_err(|e| e.to_string())
+}
+
 /// Launches an application bundle or executable.
 pub fn launch_app(path: &Path) -> Result<(), String> {
     std::process::Command::new("open").arg(path).spawn().map(|_| ()).map_err(|e| e.to_string())

desktop/app/src/win/shell.rs

@@ -188,6 +188,11 @@ pub fn launch_app(path: &std::path::Path) -> Result<(), String> {
     if result.0 as isize > 32 { Ok(()) } else { Err(format!("ShellExecute returned {}", result.0 as isize)) }
 }
 
+/// Opens a directory in File Explorer.
+pub fn open_folder(path: &std::path::Path) -> Result<(), String> {
+    std::process::Command::new("explorer.exe").arg(path).spawn().map(|_| ()).map_err(|e| e.to_string())
+}
+
 /// Runs a PC-configured shell command (`cmd.exe /C <command>`) without flashing
 /// a console window.
 pub fn run_command(command: &str) -> Result<(), String> {