Available Quiz List Page

List of the quizzes that are public and ready to take.
List of the quizzes that are private and is exclusive for you to take.

No files or tests are named in the issue. Start by checking the Vue frontend routes and quiz-related views/components to find where quiz lists are currently rendered, then trace the data flow that supplies quiz visibility and ownership. Add/update the page so it presents two lists (public ready-to-take and user-exclusive private quizzes), then verify with any existing quiz-related tests or manual route checks that both sections load correctly.

索引モデルが issue の本文から書いたものです。