Add WindowBuilder transparency

apps/magpie/src/service/window.rs

@@ -47,7 +47,9 @@ impl Window {
         renderer: Arc<Renderer>,
         event_loop: &EventLoopWindowTarget<WindowMessage>,
     ) -> anyhow::Result<Self> {
-        let window = WindowBuilder::new().build(&event_loop)?;
+        let window = WindowBuilder::new()
+            .with_transparent(true)
+            .build(&event_loop)?;
         let surface = unsafe { instance.create_surface(&window) };
         let last_update = Instant::now();