sway: sync Xwayland keyboard layout

user/sway/sway-sync-xkbmap.nix

@@ -0,0 +1,27 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  cfg = config.my.sway;
+in
+{
+  config = lib.mkIf cfg.enable {
+    systemd.user.services.sway-sync-xkbmap = {
+      Unit = {
+        Description = "Sync xkbmap with sway keyboard layout";
+        PartOf = [ "graphical-session.target" ];
+        After = [ "graphical-session.target" ];
+      };
+      Service = {
+        ExecStart = lib.getExe pkgs.sway-sync-xkbmap;
+        Restart = "on-failure";
+      };
+      Install = {
+        WantedBy = [ "sway-session.target" ];
+      };
+    };
+  };
+}