enhance(frontend): ページのデザインを調整 (#13590)

* enhance(frontend): ページのデザインを調整

* 共有ボタンを直感的な導線に変更

* Update Changelog

* Update packages/frontend/src/components/page/page.image.vue

---------

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

packages/frontend/src/components/page/page.vue

@@ -4,7 +4,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div :class="{ [$style.center]: page.alignCenter, [$style.serif]: page.font === 'serif' }" class="_gaps_s">
+<div :class="{ [$style.center]: page.alignCenter, [$style.serif]: page.font === 'serif' }" class="_gaps">
 	<XBlock v-for="child in page.content" :key="child.id" :page="page" :block="child" :h="2"/>
 </div>
 </template>