adjust smoothing in now playing spectrum

src/components/player/NowPlayingOverlay.tsx

@@ -109,6 +109,7 @@ const SUB_ICON_SIZE = 20;
 const MENU_ANIMATION_IN_MS = 130;
 const MENU_ANIMATION_OUT_MS = 100;
 const MENU_ENTER_OFFSET_Y = -8;
+const NOW_PLAYING_SPECTRUM_SMOOTHING = 0.85;
 
 interface NowPlayingMenuItem {
   key: string;
@@ -983,6 +984,7 @@ export function NowPlayingOverlay() {
                           size={artBoxSize}
                           stripWidth={layout.scopeWidth}
                           artworkUri={backdropArtworkUri}
+                          spectrumSmoothing={NOW_PLAYING_SPECTRUM_SMOOTHING}
                           paused={!playerOpen || queueOpen || !effectiveScopeStageVisible}
                         />
                       </Animated.View>
@@ -1457,6 +1459,7 @@ function ScopeRail({ width, height, mode, paused, revealed, onSwap }: ScopeRailP
         showChrome={false}
         mode={mode}
         edgeFade
+        spectrumSmoothing={NOW_PLAYING_SPECTRUM_SMOOTHING}
         paused={paused}
       />
       <Animated.View pointerEvents="none" style={[styles.scopeSwap, labelStyle]}>

src/components/player/ScopeRack.tsx

@@ -35,6 +35,7 @@ interface ScopeRackProps {
   /** Strip span (the rail's width): wider than the card, overflowing it. */
   stripWidth: number;
   artworkUri: string | null;
+  spectrumSmoothing?: number;
   /** Freeze the scopes without unmounting (overlay closed / queue open). */
   paused?: boolean;
 }
@@ -45,7 +46,13 @@ interface ScopeRackProps {
  * backdrop dissolves past the former card frame, while the strips span the
  * full rail width and independently fade at their ends.
  */
-export function ScopeRack({ size, stripWidth, artworkUri, paused = false }: ScopeRackProps) {
+export function ScopeRack({
+  size,
+  stripWidth,
+  artworkUri,
+  spectrumSmoothing,
+  paused = false,
+}: ScopeRackProps) {
   const styles = useStyles();
   const artwork = useImage(artworkUri);
   const active = useScopeActive() && !paused;
@@ -114,6 +121,7 @@ export function ScopeRack({ size, stripWidth, artworkUri, paused = false }: Scop
         <SpectrumCurve
           active={active}
           frameMs={STAGE_FRAME_MS}
+          smoothing={spectrumSmoothing}
           width={width}
           height={stripHeight}
           glow