v0.7.0 — Live Tune-panel sync to web /visualizer

What's new

Your Tune-panel sliders now drive the web /visualizer live.

Previously, the sliders in the companion's Tune panel only affected the in-app visualizer. If you had the web /visualizer running in OBS as a Browser Source, it ignored your tuning — you'd have to regenerate the OBS URL or refresh the source to see any change.

This release adds a new viz/settings WebSocket topic. Every slider drag (Audio gain, Attack, Release, Spectrum tilt, Noise gate, Auto-cycle, Blend time) broadcasts live to every connected external client. Your OBS viz now mirrors the Tune panel in real time.

How to install

1. Download tracklist-link.exe below.
2. Close the currently-running companion (right-click tray icon → Quit).
3. Replace your existing tracklist-link.exe with this one.
4. Launch it. The WebSocket server starts immediately and any paired OBS /visualizer Browser Source will start receiving Tune updates within a second.

What pairs with this release

The web side of the live-sync wiring shipped as part of twitch-spotify-tool#2 and is already live on https://music.blackpearl.gg. That PR also fixed:

• Preset catalog 404 on /visualizers
• Site header showing inside /visualizer OBS Browser Sources
• Low-res / cropped rendering on larger OBS sources
• Music overlay analyzer's per-frequency response (removed the uniform beat-driven boost)

Technical

• Tokio broadcast channel + new ServerMessage::VizSettings variant
• Snapshot sent right after Hello so new clients catch up without requiring a slider change
• Always-on broadcast (like Heartbeat) — no subscription required
• Companion frontend invokes set_viz_settings alongside localStorage writes

Protocol is backwards-compatible — older clients ignore the unknown kind: viz/settings per the forward-compat rules.