fix(frontend): fix MkInput style

packages/frontend/src/components/MkInput.vue

 <template>
 <div>
 	<div :class="$style.label" @click="focus"><slot name="label"></slot></div>
-	<div :class="[$style.input, { inline, disabled, focused }]">
+	<div :class="[$style.input, { [$style.inline]: inline, [$style.disabled]: disabled, [$style.focused]: focused }]">
 		<div ref="prefixEl" :class="$style.prefix"><slot name="prefix"></slot></div>
 		<input
 			ref="inputEl"