refactor(frontend): os.select, MkSelectのitem指定をオブジェクトによる定義に統一し、型を狭める (#16475)

* refactor(frontend): MkSelectのitem指定をオブジェクトによる定義に統一

* fix

* spdx

* fix

* fix os.select

* fix lint

* add comment

* fix

* fix: os.select対応漏れを修正

* fix

* fix

* fix: MkSelectのmodelに対する型チェックを厳格化

* fix

* fix

* fix

* Update packages/frontend/src/components/MkEmbedCodeGenDialog.vue

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

* fix

* fix types

* fix

* fix

* Update packages/frontend/src/pages/admin/roles.editor.vue

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

* fix: MkSelectに直接配列を指定している場合に正常に型が解決されるように

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/components/MkWidgets.vue

@@ -7,9 +7,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 <div :class="$style.root">
 	<template v-if="edit">
 		<header :class="$style.editHeader">
-			<MkSelect v-model="widgetAdderSelected" style="margin-bottom: var(--MI-margin)" data-cy-widget-select>
+			<MkSelect v-model="widgetAdderSelected" :items="widgetAdderSelectedDef" style="margin-bottom: var(--MI-margin)" data-cy-widget-select>
 				<template #label>{{ i18n.ts.selectWidget }}</template>
-				<option v-for="widget in _widgetDefs" :key="widget" :value="widget">{{ i18n.ts._widgets[widget] }}</option>
 			</MkSelect>
 			<MkButton inline primary data-cy-widget-add @click="addWidget"><i class="ti ti-plus"></i> {{ i18n.ts.add }}</MkButton>
 			<MkButton inline @click="emit('exit')">{{ i18n.ts.close }}</MkButton>
@@ -59,6 +58,7 @@ import { widgets as widgetDefs, federationWidgets } from '@/widgets/index.js';
 import * as os from '@/os.js';
 import { i18n } from '@/i18n.js';
 import { instance } from '@/instance.js';
+import { useMkSelect } from '@/composables/use-mkselect.js';
 
 const Sortable = defineAsyncComponent(() => import('vuedraggable').then(x => x.default));
 
@@ -89,7 +89,15 @@ const widgetRefs = {};
 const configWidget = (id: string) => {
 	widgetRefs[id].configure();
 };
-const widgetAdderSelected = ref<string | null>(null);
+
+const {
+	model: widgetAdderSelected,
+	def: widgetAdderSelectedDef,
+} = useMkSelect({
+	items: computed(() => [{ label: i18n.ts.none, value: null }, ..._widgetDefs.value.map(x => ({ label: i18n.ts._widgets[x], value: x }))]),
+	initialValue: null,
+});
+
 const addWidget = () => {
 	if (widgetAdderSelected.value == null) return;