fix(queue): marquee long track names + dedupe now-playing bars

Queue sidebar no longer scrolls horizontally on long titles/artists:
text now ping-pong scrolls (news-ticker style) only when it overflows,
via a new Marquee component; .qd-scroll also clips overflow-x.

The current track previously showed the playing-bars indicator both in
place of the drag grip and over the cover. Keep only the cover overlay
and restore the drag grip on the current row.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/common/Marquee.tsx

@@ -0,0 +1,39 @@
+import { useLayoutEffect, useRef, useState, type CSSProperties } from 'react';
+
+/** Single-line text that ping-pong scrolls (like a news ticker) only when it
+ * overflows its container, otherwise renders as static clipped text. Keeps the
+ * queue panel from ever growing a horizontal scrollbar on long titles. */
+export function Marquee({
+  text,
+  className,
+}: {
+  text: string;
+  className?: string;
+}) {
+  const ref = useRef<HTMLSpanElement>(null);
+  const [shift, setShift] = useState(0);
+
+  useLayoutEffect(() => {
+    const el = ref.current;
+    if (!el) return;
+    const measure = () => {
+      const inner = el.firstElementChild as HTMLElement | null;
+      const overflow = (inner?.scrollWidth ?? 0) - el.clientWidth;
+      setShift(overflow > 1 ? overflow : 0);
+    };
+    measure();
+    const ro = new ResizeObserver(measure);
+    ro.observe(el);
+    return () => ro.disconnect();
+  }, [text]);
+
+  return (
+    <span
+      ref={ref}
+      className={`marquee${shift ? ' on' : ''}${className ? ` ${className}` : ''}`}
+      style={shift ? ({ '--mq-shift': `-${shift}px` } as CSSProperties) : undefined}
+    >
+      <span className="marquee-inner">{text}</span>
+    </span>
+  );
+}

src/components/player/QueuePanel.tsx

@@ -26,6 +26,7 @@ import {
 import { CSS } from '@dnd-kit/utilities';
 import { Icon } from '../common/Icon';
 import { ArtTile } from '../common/ArtTile';
+import { Marquee } from '../common/Marquee';
 import { PlayingIndicator } from '../common/PlayingIndicator';
 import { useAppDispatch, useAppSelector } from '../../hooks/useAppDispatch';
 import {
@@ -259,13 +260,9 @@ function QueueRow({
       onDoubleClick={onPlay}
       title={t('queue.doubleClickPlay')}
     >
-      {isCurrent ? (
-        <PlayingIndicator animate={isPlaying} />
-      ) : (
-        <span className="grip" {...attributes} {...listeners}>
-          <Icon name="dots-six-vertical" />
-        </span>
-      )}
+      <span className="grip" {...attributes} {...listeners}>
+        <Icon name="dots-six-vertical" />
+      </span>
       <div className="qart">
         <ArtTile seed={albumTitle} size={36} label={albumTitle} src={artUrl} />
         {isCurrent && (
@@ -275,8 +272,8 @@ function QueueRow({
         )}
       </div>
       <div className="qt">
-        <div className="t">{resolved?.title ?? entry.title}</div>
-        <div className="r">{resolved?.artistName ?? entry.artistName}</div>
+        <Marquee className="t" text={resolved?.title ?? entry.title} />
+        <Marquee className="r" text={resolved?.artistName ?? entry.artistName} />
       </div>
       <Menu>
         <MenuTrigger asChild>

src/styles/shell.css

@@ -651,6 +651,7 @@
   flex: 1;
   min-height: 0;
   overflow-y: auto;
+  overflow-x: hidden;
   padding: 12px 12px 18px;
 }
 .qrow {
@@ -700,23 +701,46 @@
   font-size: 13px;
   font-weight: 500;
   color: var(--fg-1);
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
 }
 .qrow .qt .r {
   font-size: 11px;
   color: var(--fg-3);
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  display: flex;
-  align-items: center;
-  gap: 4px;
 }
-.qrow .qt .r .ph {
-  color: var(--lime);
-  font-size: 11px;
+
+/* News-ticker text: clips by default, ping-pong scrolls only when it overflows
+   (the .on class is set by the Marquee component after measuring). */
+.marquee {
+  display: block;
+  max-width: 100%;
+  overflow: hidden;
+  white-space: nowrap;
+}
+.marquee-inner {
+  display: inline-block;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+  max-width: 100%;
+  overflow: hidden;
+  vertical-align: bottom;
+}
+.marquee.on .marquee-inner {
+  max-width: none;
+  animation: marquee-pingpong 9s ease-in-out infinite alternate;
+}
+@keyframes marquee-pingpong {
+  0%,
+  12% {
+    transform: translateX(0);
+  }
+  88%,
+  100% {
+    transform: translateX(var(--mq-shift, 0));
+  }
+}
+@media (prefers-reduced-motion: reduce) {
+  .marquee.on .marquee-inner {
+    animation: none;
+  }
 }
 .qd-radio {
   margin-bottom: 14px;