cleanup: trim trailing whitespace (#11136)

* cleanup: trim trailing whitespace

* update(`.editorconfig`)

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Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/pages/admin/index.vue

@@ -1,6 +1,6 @@
 <template>
 <div ref="el" class="hiyeyicy" :class="{ wide: !narrow }">
-	<div v-if="!narrow || currentPage?.route.name == null" class="nav">	
+	<div v-if="!narrow || currentPage?.route.name == null" class="nav">
 		<MkSpacer :contentMax="700" :marginMin="16">
 			<div class="lxpfedzu">
 				<div class="banner">