ReactionsViewerが消えることがある問題を修正

packages/frontend/src/components/MkReactionsViewer.reaction.vue

 <template>
 <button
-	v-if="count > 0"
 	ref="buttonRef"
 	v-ripple="canToggle"
 	class="hkzvhatu _button"

packages/frontend/src/components/MkReactionsViewer.vue

 <template>
 <Transition :name="$store.state.animation ? 'y' : ''">
-<div v-if="Object.keys(note.reactions).length > 0" class="tdflqwzn" :class="{ isMe }">
-	<TransitionGroup :name="$store.state.animation ? 'x' : ''">
+	<TransitionGroup v-if="Object.keys(note.reactions).length > 0" :name="$store.state.animation ? 'x' : ''" tag="div" class="tdflqwzn" :class="{ isMe }">
 		<XReaction v-for="(count, reaction) in note.reactions" :key="reaction" :reaction="reaction" :count="count" :is-initial="initialReactions.has(reaction)" :note="note"/>
 	</TransitionGroup>
-</div>
 </Transition>
 </template>
 

packages/frontend/src/scripts/use-note-capture.ts

@@ -45,6 +45,7 @@ export function useNoteCapture(props: {
 				const currentCount = (note.value.reactions || {})[reaction] || 0;
 
 				note.value.reactions[reaction] = Math.max(0, currentCount - 1);
+				if (note.value.reactions[reaction] === 0) delete note.value.reactions[reaction];
 
 				if ($i && (body.userId === $i.id)) {
 					note.value.myReaction = null;