Add redirect from item.index to item.data

app/routes/admin/indexes/item/index.js

@@ -0,0 +1,12 @@
+import Route from '@ember/routing/route';
+import { inject as service } from '@ember/service';
+
+export default class AdminIndexesItemIndexRoute extends Route {
+  @service router;
+
+  beforeModel() {
+    const item = this.modelFor('admin.indexes.item');
+
+    this.router.transitionTo('admin.indexes.item.data', item);
+  }
+}

app/templates/admin/indexes/item.hbs

@@ -2,7 +2,7 @@
 
 <h1 class="text-2xl mb-4">{{capitalize @model.name}}</h1>
 
-<div class="flex border-b">
+<div class="flex">
   <Tab @route="admin.indexes.item.data" @text="Data" @icon="database-outline" @model={{@model.name}} />
   <Tab @route="admin.indexes.item.settings" @text="Settings" @icon="cog-outline" @model={{@model.name}} />
 </div>

app/templates/admin/indexes/item/index.hbs

@@ -0,0 +1,2 @@
+{{page-title "Index"}}
+{{outlet}}

tests/unit/routes/admin/indexes/item/index-test.js

@@ -0,0 +1,11 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+
+module('Unit | Route | admin/indexes/item/index', function (hooks) {
+  setupTest(hooks);
+
+  test('it exists', function (assert) {
+    let route = this.owner.lookup('route:admin/indexes/item/index');
+    assert.ok(route);
+  });
+});