fix(general): some fixes and improvements of Play visibility (#14384)

* fix(backend): missing `visibility` param in packing flash

* fix(frontend): use `visibility` value got from API

* enhance(frontend): change preview appearance of private Play

* Update CHANGELOG.md

packages/backend/src/core/entities/FlashEntityService.ts

@@ -49,6 +49,7 @@ export class FlashEntityService {
 			title: flash.title,
 			summary: flash.summary,
 			script: flash.script,
+			visibility: flash.visibility,
 			likedCount: flash.likedCount,
 			isLiked: meId ? await this.flashLikesRepository.exists({ where: { flashId: flash.id, userId: meId } }) : undefined,
 		});