feat: add multi-monitor support

widgets/bar/index.tsx

@@ -8,10 +8,11 @@ import { Tray } from "./tray";
 import { WorkspaceButton } from "./workspace";
 import { Bluetooth } from "./bluetooth";
 import { Cava } from "./cava";
+import { onCleanup } from "gnim";
 
 export const WINDOW_NAME = "bar";
 
-export const Bar = (gdkmonitor: Gdk.Monitor) => {
+export const Bar = ({ gdkmonitor }: { gdkmonitor: Gdk.Monitor }) => {
   const { TOP } = Astal.WindowAnchor;
 
   return (
@@ -24,6 +25,7 @@ export const Bar = (gdkmonitor: Gdk.Monitor) => {
       anchor={TOP}
       widthRequest={1200}
       application={app}
+      $={(self) => onCleanup(() => self.destroy())}
     >
       <centerbox>
         <box spacing={10} $type="start">