YooA Project Y: Menguasai Misuh, Totalitas Akting Debut Ala Latihan Vokal

I will ensure:
* Strong hard news lead.
* In-depth analysis of the "vocal training" analogy.
* Context of K-pop idol transitions and image management.
* Implications for YooA's career and the industry.
* Objective, formal tone, active voice.
* Plain text, no markdown, no title, no dateline, no AI intro.
* Citations for all factual claims from search results.