enhance(frontend): リアクションの表示サイズをより大きくできるように

packages/frontend/src/store.ts

@@ -316,9 +316,9 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'device',
 		default: false,
 	},
-	largeNoteReactions: {
+	reactionsDisplaySize: {
 		where: 'device',
-		default: false,
+		default: 'medium' as 'small' | 'medium' | 'large',
 	},
 	forceShowAds: {
 		where: 'device',