dankinstall: xray false for niri in default config

core/internal/config/embedded/niri-layout.kdl

@@ -20,3 +20,10 @@ window-rule {
     tiled-state true
     draw-border-with-background false
 }
+
+layer-rule {
+    exclude namespace="^dms:bar$"
+    background-effect {
+        xray false
+    }
+}