The highway showed two overlapping note-detection scoreboards at once: the
core v3 live-performance HUD (#v3-live-performance-hud) and the note_detect
plugin's own HUD (.nd-hud). Both auto-render off the same note:hit/note:miss
events and neither suppressed the other.
Add a Settings → Visualization "Scoreboard" selector (Streak / Detailed /
Off, default Streak) backed by a single source of truth on
<html data-scoreboard>. CSS shows exactly one:
core (default) → core HUD; hide .nd-hud
detailed → .nd-hud; hide the core HUD
off → hide both
CSS-based suppression keys the default off ":not(detailed):not(off)", so the
correct HUD is right even before the pref script runs (no flash) and it
robustly hides any .nd-hud regardless of how many note_detect instances load.
Detection itself is untouched — only the duplicate scoreboard panel is hidden.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
