fix: add missing FeaturesRoadmap.vue referenced by manifest custom page

docs/features.json

@@ -0,0 +1 @@
+[]

lib/Controller/PreferencesController.php

@@ -62,7 +62,7 @@ public function __construct(
      *
      * @NoAdminRequired
      * @NoCSRFRequired
-     * @spec openspec/changes/retrofit-2026-05-26-frontend-foundation/tasks.md#task-5
+     * @spec            openspec/changes/retrofit-2026-05-26-frontend-foundation/tasks.md#task-5
      */
     public function getPreference(string $key): JSONResponse
     {
@@ -102,7 +102,7 @@ public function getPreference(string $key): JSONResponse
      *
      * @NoAdminRequired
      * @NoCSRFRequired
-     * @spec openspec/changes/retrofit-2026-05-26-frontend-foundation/tasks.md#task-5
+     * @spec            openspec/changes/retrofit-2026-05-26-frontend-foundation/tasks.md#task-5
      */
     public function setPreference(string $key, string $value=''): JSONResponse
     {

src/views/FeaturesRoadmap.vue

@@ -0,0 +1,38 @@
+<template>
+	<CnFeaturesAndRoadmapView
+		:repo="repo"
+		:features="features"
+		:disabled="disabled" />
+</template>
+
+<script>
+// SPDX-License-Identifier: EUPL-1.2
+// Copyright (C) 2026 Conduction B.V.
+//
+// Features & Roadmap page — thin wrapper around `CnFeaturesAndRoadmapView`
+// from `@conduction/nextcloud-vue`. Mounted as the manifest `custom` page
+// `FeaturesRoadmap` (route `/features-roadmap`, surfaced from the Settings
+// section of the nav). `repo` / `features` / `disabled` come from
+// server-provided initial state when available, with sensible fallbacks so
+// the page is usable without backend wiring (the roadmap proxy and the
+// `openregister::features_roadmap_enabled` flag live on OpenRegister).
+
+import { CnFeaturesAndRoadmapView } from '@conduction/nextcloud-vue'
+import { loadState } from '@nextcloud/initial-state'
+
+export default {
+	name: 'FeaturesRoadmap',
+
+	components: {
+		CnFeaturesAndRoadmapView,
+	},
+
+	data() {
+		return {
+			repo: loadState('openbuilt', 'features_roadmap_repo', 'ConductionNL/openbuilt'),
+			features: loadState('openbuilt', 'features_roadmap_features', []),
+			disabled: loadState('openbuilt', 'features_roadmap_disabled', false),
+		}
+	},
+}
+</script>