feat(track): play-on-hover cover art, replacing double-click

Add a play overlay button shown on cover art hover that inserts the
track into the queue right after the current track and jumps to it,
so it takes priority over what's already queued. Replaces the
double-click-to-play interaction with a new playNow queue action.

src/components/track/TrackRow.tsx

@@ -1,10 +1,12 @@
 import { Row } from '@olly/modern-sk';
+import { useTranslation } from 'react-i18next';
 import { TrackContextMenu } from './TrackContextMenu';
 import { AvailabilityBadge } from './AvailabilityBadge';
 import { MetadataStatusBadge } from './MetadataStatusBadge';
+import { Icon } from '../common/Icon';
 import { formatDuration } from '../../lib/format';
 import { useAppDispatch, useAppSelector } from '../../hooks/useAppDispatch';
-import { play } from '../../store/slices/player';
+import { playNow } from '../../store/slices/queue';
 import type { Track } from '../../api/types';
 import { getCoverUrl, getTrackCoverUrl } from '../../api/endpoints/streaming';
 
@@ -25,6 +27,7 @@ export function TrackRow({
   onEditMetadata,
   onDelete,
 }: Props) {
+  const { t } = useTranslation();
   const dispatch = useAppDispatch();
   const currentTrackId = useAppSelector((s) => s.player.currentTrackId);
   const isPlaying = useAppSelector((s) => s.player.isPlaying);
@@ -36,10 +39,22 @@ export function TrackRow({
     getCoverUrl(track.albumArtUrl) ??
     (token ? getTrackCoverUrl(track.id, token, track.hasCover) : undefined);
 
+  const handlePlayNow = () => {
+    dispatch(
+      playNow({
+        trackId: track.id,
+        title: track.title,
+        artistName: track.artistName,
+        albumTitle: track.albumTitle,
+        durationMs: track.durationMs,
+        albumArtUrl: track.albumArtUrl,
+      }),
+    );
+  };
+
   return (
     <Row
       selected={isActive}
-      onDoubleClick={() => dispatch(play(track.id))}
       style={{
         display: 'grid',
         gridTemplateColumns: '2rem 2.5rem 1fr auto auto',
@@ -58,6 +73,10 @@ export function TrackRow({
       >
         {isActive && isPlaying ? '▶' : index !== undefined ? index + 1 : ''}
       </span>
+      <div
+        className="track-art"
+        style={{ position: 'relative', width: 36, height: 36 }}
+      >
         {artUrl ? (
           <img
             src={artUrl}
@@ -76,6 +95,16 @@ export function TrackRow({
             }}
           />
         )}
+        <button
+          type="button"
+          className="track-art-play"
+          onClick={handlePlayNow}
+          aria-label={t('track.menu.playNow')}
+          title={t('track.menu.playNow')}
+        >
+          <Icon name="play" fill />
+        </button>
+      </div>
       <div style={{ minWidth: 0 }}>
         <div
           style={{

src/store/slices/queue.ts

@@ -59,6 +59,11 @@ export const queueSlice = createSlice({
     addNextInQueue(state, action: PayloadAction<QueueEntry>) {
       state.entries.splice(state.currentIndex + 1, 0, action.payload);
     },
+    playNow(state, action: PayloadAction<QueueEntry>) {
+      const insertAt = state.currentIndex + 1;
+      state.entries.splice(insertAt, 0, action.payload);
+      state.currentIndex = insertAt;
+    },
     removeFromQueue(state, action: PayloadAction<number>) {
       state.entries.splice(action.payload, 1);
       if (action.payload < state.currentIndex) state.currentIndex--;
@@ -93,6 +98,7 @@ export const {
   setQueue,
   addToQueue,
   addNextInQueue,
+  playNow,
   removeFromQueue,
   moveInQueue,
   goToIndex,

src/styles/shell.css

@@ -951,3 +951,28 @@
 .sb-sec-link.active {
   color: var(--fg-1);
 }
+
+/* ============================================================
+   TRACK ROW — cover art play overlay
+   ============================================================ */
+.track-art-play {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border: none;
+  border-radius: 4px;
+  background: rgba(0, 0, 0, 0.5);
+  color: var(--fg-1);
+  font-size: 16px;
+  cursor: pointer;
+  opacity: 0;
+  transition: opacity var(--dur-quick);
+}
+.track-art:hover .track-art-play {
+  opacity: 1;
+}
+.track-art-play:hover {
+  color: var(--lime);
+}