quickshell: focus window on tray icon click for xembed-sni-proxy items

XTest click forwarding doesn't work under Hyprland's XWayland, so
fall back to Hyprland.dispatch focuswindow for menu-less tray items.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

settings/hyprland.nix

@@ -1203,6 +1203,9 @@ in
                                                 });
                                             } else {
                                                 modelData.activate();
+                                                if (!modelData.hasMenu && modelData.title) {
+                                                    Hyprland.dispatch("focuswindow title:" + modelData.title);
+                                                }
                                             }
                                         }
                                     }