feat(hyprland): emit compositor config as lua

configs/nixos/modules/desktop/utilities/recording.nix

@@ -6,6 +6,16 @@
 }:
 # Keybound screen recording: pick a region, then toggle a video-only capture.
 let
+  execBind = key: command: {
+    _args = [
+      key
+      (luaCall "hl.dsp.exec_cmd" [ command ])
+    ];
+  };
+  luaCall =
+    function: args:
+    lib.generators.mkLuaInline "${function}(${lib.concatMapStringsSep ", " toLua args})";
+
   user = config.user.name;
 
   slurp = "${pkgs.slurp}/bin/slurp";
@@ -38,6 +48,8 @@ let
     ${wf-recorder} -g "$region" -f "$file"
     ${notify-send} -a "Screen recording" "Recording saved" "$file"
   '';
+
+  toLua = lib.generators.toLua { };
 in
 {
   options.modules.desktop.utilities.recording.enable =
@@ -45,9 +57,8 @@ in
 
   config = lib.mkIf config.modules.desktop.utilities.recording.enable {
     home-manager.users.${user} = {
-      # $mod is defined by the compositor config these binds share.
       wayland.windowManager.hyprland.settings.bind = [
-        "$mod SHIFT, R, exec, ${toggle}"
+        (execBind "SUPER + SHIFT + R" "${toggle}")
       ];
     };
   };