FIX: Regression after a core change (#27)

a3d0a9edbb in core converted the Users route to a native class, which meant that `queryParams` merging no longer works.

Extend it manually in `init()`.

javascripts/discourse/initializers/user-card-directory.js

@@ -11,6 +11,11 @@ export default {
       api.modifyClass("route:users", {
         pluginId: "user-card-directory",
 
+        init() {
+          this._super(...arguments);
+          this.queryParams.cards = { refreshModel: true };
+        },
+
         get templateName() {
           if (this.modelFor("users")?.showAsCards) {
             return "users-as-card-directory";
@@ -26,10 +31,6 @@ export default {
           }
         },
 
-        queryParams: {
-          cards: { refreshModel: true },
-        },
-
         model(params) {
           return this._super(params).then((model) => {
             model.showAsCards =