First batch of beta feedback fixes
Eight items from the first round of beta feedback, in one focused day. A subtle Compose race condition that broke Feel-the-Beat, a rename of “Special Entry” to “Break”, per-playlist rename via a 3-dot overflow menu, an in-library New Song affordance, a system-nav clipping fix, a restructured top-bar menu, and the first version of an Edit Sound screen with live frequency and tone control plumbed all the way down to the Oboe callback.