Social profiles, following, and playlists (in-app music sharing)

Add social features so creators can share and discover music directly on Songer, without sending people to YouTube or other platforms.

Requested features:

1. Profile pages – A personal page (MySpace-style) where users can showcase their songs and videos in one place and share a single link with others.

2. Following – The ability to follow other users (including friends and family) and see what they're creating.

3. Playlists – Group songs into playlists that play continuously, so there's no need to manually start each track.

4. Better organization – Improved layout and structure for browsing and managing songs.

The goal is to make Songer a place to both create and listen, with built-in support for discovering and supporting other creators.