Fix space reservation

- Override window management to avoid reserving space or moving other windows

crates/popcorn/src/show_popup.rs

@@ -80,10 +80,17 @@ fn set_ui_props(
 /// Create and display the OSD popup window.
 /// Loads config, applies X11 window attributes, sets UI props, and runs the Slint event loop.
 pub fn show_popup(args: &OsdArgs) -> Result<(), Box<dyn std::error::Error>> {
+    // Load configs.
     let cfg = PopcornConfig::load_or_default();
 
-    // Mark the window as a dock-type override window so WMs treat it like an OSD layer.
-    let window_attrs = |attrs: WindowAttributes| attrs.with_x11_window_type(vec![WindowType::Dock]);
+    // Configure X11 window attributes before Slint creates the window.
+    let window_attrs = |attrs: WindowAttributes| {
+        attrs
+            // Present the window as a dock so most WMs avoid decorations and normal window rules.
+            .with_x11_window_type(vec![WindowType::Dock])
+            // Make the window unmanaged. This prevents tiling WMs from reserving space or moving it.
+            .with_override_redirect(true)
+    };
 
     // Build and activate backend with X11 window-attribute hook.
     let backend = Backend::builder()
@@ -95,6 +102,8 @@ pub fn show_popup(args: &OsdArgs) -> Result<(), Box<dyn std::error::Error>> {
     let ui = OSDpopup::new()?;
     set_ui_props(&ui, &cfg, args)?;
 
+    // Run!
     ui.run()?;
+
     Ok(())
 }