Fix bos-settings compile errors and use REGISTRY_TOKEN for publishing

bos-settings was scaffolded but never compiled. Fixes:
- main.rs: import gtk4::prelude (connect_activate/run)
- window.rs: disambiguate WidgetExt::display(); drop unused GBox import
- hyprland.rs: Label has no set_monospace -> use the monospace CSS class
- theme.rs: drop unused prelude import

Also switch package.yml to secrets.REGISTRY_TOKEN (scoped write:package),
since the auto Actions token is not authorized for the owner registry.

bos-settings/src/main.rs

@@ -2,6 +2,8 @@ mod config;
 mod theme;
 mod ui;
 
+use gtk4::prelude::*;
+
 fn main() {
     let app = gtk4::Application::builder()
         .application_id("com.breadway.bos-settings")

bos-settings/src/theme.rs

@@ -1,4 +1,3 @@
-use gtk4::prelude::*;
 use gtk4::CssProvider;
 
 const CSS: &str = r#"

bos-settings/src/ui/views/hyprland.rs

@@ -50,7 +50,7 @@ pub fn build() -> GBox {
         for mon in &monitors {
             let lbl = Label::new(Some(mon));
             lbl.set_xalign(0.0);
-            lbl.set_monospace(true);
+            lbl.add_css_class("monospace");
             vbox.append(&lbl);
         }
     }

bos-settings/src/ui/window.rs

@@ -1,5 +1,5 @@
 use gtk4::prelude::*;
-use gtk4::{Application, ApplicationWindow, Box as GBox, Orientation, Paned, Stack};
+use gtk4::{Application, ApplicationWindow, Orientation, Paned, Stack};
 
 use super::sidebar;
 use super::views;
@@ -12,7 +12,7 @@ pub fn build_ui(app: &Application) {
         .default_height(640)
         .build();
 
-    crate::theme::load(&window.display());
+    crate::theme::load(&WidgetExt::display(&window));
 
     let hpaned = Paned::new(Orientation::Horizontal);
     hpaned.set_position(190);