0.23.0 — karaoke sync, mood-driven motion, and the visuals on the GPU

The visual-depth release: the words move with the voice, the field moves with
the mood, and the heavy layers moved onto the GPU.

What's new

• Karaoke word fill. The word being sung lights up left-to-right in time,
  instead of all at once.
• The visuals match the mood. A calm song moves gently, a driving one
  harder — not just a different colour.
• A deep-space starfield drifts behind the field, rendered on the GPU.
• The galaxy runs on the GPU now — the 260-point spiral moved off the CPU
  into the shader, same look, far cheaper.
• MilkDrop presets stick — a preset you pick no longer snaps back to the
  default when the frame rate dips.

Under the hood

Both new visual layers degrade gracefully: if a shader can't build, the app
falls back to the old path rather than showing nothing.

Install

On 0.22.0 this arrives by auto-update, differentially — a few MB, not the whole
download.