ghostty: reload service on configuration change

modules/programs/ghostty.nix

@@ -231,6 +231,15 @@ in
         xdg.configFile."systemd/user/app-com.mitchellh.ghostty.service.d/overrides.conf".text = ''
           [Unit]
           X-SwitchMethod=keep-old
+          X-Reload-Triggers=${
+            let
+              storePathOf = name: config.xdg.configFile.${name}.source;
+            in
+            toString (
+              lib.optionals (cfg.settings != { }) [ (storePathOf "ghostty/config") ]
+              ++ lib.mapAttrsToList (name: _: storePathOf "ghostty/themes/${name}") cfg.themes
+            )
+          }
         '';
 
         dbus.packages = [ cfg.package ];