feat(hyprland): render session env registry

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

@@ -58,6 +58,10 @@ in
         };
       };
     };
+    registry.env.${config.networking.hostName} = {
+      HYPRCURSOR_THEME = config.stylix.cursor.name;
+      HYPRCURSOR_SIZE = toString config.stylix.cursor.size;
+    };
 
     home-manager.users.${user} = {
       # Stylix drives the cursor through home-manager's pointer-cursor config,