feat(queue): add Timeline display mode (#1004)

* feat(queue): add Timeline display mode

A third queue display mode alongside Queue and Playlist. Timeline shows
the full queue anchored on the current track — played history above
(dimmed), upcoming below — with 'History' and 'Up next' dividers and the
current row auto-centered. It already follows shuffle order since the
queue is stored in play order. The header mode button now cycles
queue → timeline → playlist; Settings gains a third option.

* i18n(queue): Timeline mode strings (9 locales)

* docs(changelog): note Timeline queue mode (#1004)

CHANGELOG.md

@@ -31,6 +31,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 
+### Queue — Timeline display mode
+
+**By [@Psychotoxical](https://github.com/Psychotoxical), PR [#1004](https://github.com/Psychotoxical/psysonic/pull/1004), suggested by [@Legislate3030](https://github.com/Legislate3030)**
+
+* New third queue display mode (cycle the header button, or pick it in **Settings → Personalisation → Queue display**). Timeline keeps the current track centered with played history above and upcoming tracks below — both visible at once — so it's easy to follow playback and jump back to earlier songs.
+* The up-next order respects shuffle, and a "History" / "Up next" divider marks the boundary.
+
+
+
 ## Changed
 
 ### Dependencies — npm and Rust refresh

src/components/QueuePanel.test.tsx

@@ -156,16 +156,16 @@ describe('QueuePanel — display mode', () => {
     expect(container.textContent).toContain('No upcoming tracks');
   });
 
-  it('header mode-toggle button flips queueDisplayMode (default queue → playlist)', () => {
+  it('header mode-toggle button advances queueDisplayMode (default queue → timeline)', () => {
     seedQueue(makeTracks(3), { index: 0, currentTrack: makeTrack() });
     const { container } = renderWithProviders(<QueuePanel />);
     // The mode toggle is the first .queue-action-btn in the header (the
-    // collapse chevron is the second). The default mode is 'queue', so the
-    // toggle's label names its target ("Playlist").
+    // collapse chevron is the second). The toggle's label names its target;
+    // from the default 'queue' that is the next mode in the cycle, "Timeline".
     const toggle = container.querySelector<HTMLButtonElement>('.queue-header .queue-action-btn');
-    expect(toggle?.getAttribute('aria-label')).toBe('Playlist');
+    expect(toggle?.getAttribute('aria-label')).toBe('Timeline');
     toggle!.click();
-    expect(useAuthStore.getState().queueDisplayMode).toBe('playlist');
+    expect(useAuthStore.getState().queueDisplayMode).toBe('timeline');
   });
 });
 

src/components/queuePanel/QueueHeader.tsx

@@ -1,5 +1,5 @@
 import { useDeferredValue, useMemo, useSyncExternalStore } from 'react';
-import { ChevronDown, ListMusic, ListOrdered } from 'lucide-react';
+import { AlignCenterVertical, ChevronDown, ListMusic, ListOrdered } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
 import type { TFunction } from 'i18next';
 import { usePlayerStore } from '../../store/playerStore';
@@ -81,6 +81,16 @@ export function QueueHeader({
 
   const isEta = durationMode === 'eta';
 
+  // Cycle the panel through the three render modes; icon + title show the active
+  // one, tooltip names the one a click switches to.
+  const DISPLAY_MODE_CYCLE: QueueDisplayMode[] = ['queue', 'timeline', 'playlist'];
+  const nextDisplayMode =
+    DISPLAY_MODE_CYCLE[(DISPLAY_MODE_CYCLE.indexOf(queueDisplayMode) + 1) % DISPLAY_MODE_CYCLE.length];
+  const displayModeLabel = (m: QueueDisplayMode) =>
+    m === 'playlist' ? t('queue.modePlaylist') : m === 'timeline' ? t('queue.modeTimeline') : t('queue.title');
+  const displayModeIcon = (m: QueueDisplayMode) =>
+    m === 'playlist' ? <ListMusic size={15} /> : m === 'timeline' ? <AlignCenterVertical size={15} /> : <ListOrdered size={15} />;
+
   return (
     <div className="queue-header">
       <div style={{ display: "flex", flexDirection: "column", minWidth: 0, flex: 1 }}>
@@ -91,17 +101,17 @@ export function QueueHeader({
           <button
             type="button"
             className="queue-action-btn"
-            onClick={() => setQueueDisplayMode(queueDisplayMode === 'playlist' ? 'queue' : 'playlist')}
-            data-tooltip={queueDisplayMode === 'playlist' ? t('queue.title') : t('queue.modePlaylist')}
-            aria-label={queueDisplayMode === 'playlist' ? t('queue.title') : t('queue.modePlaylist')}
+            onClick={() => setQueueDisplayMode(nextDisplayMode)}
+            data-tooltip={displayModeLabel(nextDisplayMode)}
+            aria-label={displayModeLabel(nextDisplayMode)}
             style={{ width: 24, height: 24, alignSelf: 'center', flexShrink: 0 }}
           >
-            {queueDisplayMode === 'playlist' ? <ListMusic size={15} /> : <ListOrdered size={15} />}
+            {displayModeIcon(queueDisplayMode)}
           </button>
-          {/* Title doubles as the mode indicator so the panel reads "Playlist"
-              in playlist mode rather than the misleading "Queue". */}
+          {/* Title doubles as the mode indicator so the panel names the active
+              mode rather than always reading "Queue". */}
           <h2 style={{ fontSize: "16px", fontWeight: 700, margin: 0, flexShrink: 0 }}>
-            {queueDisplayMode === 'playlist' ? t('queue.modePlaylist') : t('queue.title')}
+            {displayModeLabel(queueDisplayMode)}
           </h2>
           {queue.length > 0 && (
             <span style={{ fontSize: "13px", color: "var(--text-muted)", whiteSpace: "nowrap", userSelect: "none" }}>

src/components/queuePanel/QueueList.tsx

@@ -108,6 +108,16 @@ export function QueueList({
       return pinToTop(0, displayBaseIndex);
     }
 
+    if (queueDisplayMode === 'timeline') {
+      // Anchor the current track in the middle — history above, up-next below.
+      rowVirtualizer.scrollToIndex(queueIndex, { align: 'center' });
+      const id = requestAnimationFrame(() => {
+        const el = queueListRef.current?.querySelector<HTMLElement>(`[data-queue-idx="${queueIndex}"]`);
+        el?.scrollIntoView({ block: 'center', behavior: 'instant' });
+      });
+      return () => cancelAnimationFrame(id);
+    }
+
     // Playlist: lazy. Let the highlight wander while the now-playing row stays
     // visible; only re-pin it to the top once it has scrolled out of view.
     const viewport = queueListRef.current;
@@ -148,6 +158,8 @@ export function QueueList({
           const base = queue[idx];
           const track = resolveQueueTrack(base);
           const isPlaying = absIdx === queueIndex;
+          const isTimeline = queueDisplayMode === 'timeline';
+          const isPast = isTimeline && absIdx < queueIndex;
           const isFirstAutoAdded = base.autoAdded && (idx === 0 || !queue[idx - 1].autoAdded);
           const isFirstRadioAdded = base.radioAdded && (idx === 0 || !queue[idx - 1].radioAdded);
 
@@ -169,6 +181,16 @@ export function QueueList({
               ref={rowVirtualizer.measureElement}
               style={{ position: 'absolute', top: 0, left: 0, width: '100%', transform: `translateY(${vi.start}px)` }}
             >
+            {isTimeline && idx === 0 && queueIndex > 0 && (
+              <div className="queue-divider" style={{ margin: '2px 0' }}>
+                <span style={{ fontSize: '11px', fontWeight: 600, color: 'var(--text-muted)' }}>{t('queue.history')}</span>
+              </div>
+            )}
+            {isTimeline && absIdx === queueIndex + 1 && (
+              <div className="queue-divider" style={{ margin: '2px 0' }}>
+                <span style={{ fontSize: '11px', fontWeight: 600, color: 'var(--text-muted)' }}>{t('queue.upNext')}</span>
+              </div>
+            )}
             {isFirstRadioAdded && (
               <div className="queue-divider" style={{ margin: '2px 0' }}>
                 <span style={{ fontSize: '11px', fontWeight: 500, color: 'var(--text-muted)' }}>{t('queue.radioAdded')}</span>
@@ -213,7 +235,7 @@ export function QueueList({
                 document.addEventListener('mousemove', onMove);
                 document.addEventListener('mouseup', onUp);
               }}
-              style={dragStyle}
+              style={{ ...(isPast && !isPlaying ? { opacity: 0.5 } : null), ...dragStyle }}
             >
               <div className="queue-item-info">
                 <div className="queue-item-title truncate" style={{ display: 'flex', alignItems: 'center', gap: '6px' }}>

src/components/settings/PersonalisationTab.tsx

@@ -84,8 +84,8 @@ export function PersonalisationTab() {
         icon={<ListOrdered size={16} />}
       >
         <div className="settings-card">
-          {/* Two mutually exclusive modes — exactly one is always active, so
-              turning one on turns the other off; the active one cannot be
+          {/* Three mutually exclusive modes — exactly one is always active, so
+              turning one on turns the others off; the active one cannot be
               switched off directly (ignore the uncheck). */}
           <div className="settings-toggle-row">
             <div>
@@ -116,6 +116,21 @@ export function PersonalisationTab() {
               <span className="toggle-track" />
             </label>
           </div>
+          <div className="settings-section-divider" />
+          <div className="settings-toggle-row">
+            <div>
+              <div style={{ fontWeight: 500 }}>{t('queue.modeTimeline')}</div>
+              <div style={{ fontSize: 12, color: 'var(--text-muted)' }}>{t('settings.queueModeTimelineSub')}</div>
+            </div>
+            <label className="toggle-switch" aria-label={t('queue.modeTimeline')}>
+              <input
+                type="checkbox"
+                checked={queueDisplayMode === 'timeline'}
+                onChange={e => { if (e.target.checked) setQueueDisplayMode('timeline'); }}
+              />
+              <span className="toggle-track" />
+            </label>
+          </div>
         </div>
       </SettingsSubSection>
 

src/locales/de/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'Warteschlange',
   modePlaylist: 'Playlist',
+  modeTimeline: 'Zeitachse',
+  upNext: 'Als Nächstes',
+  history: 'Verlauf',
   noUpcoming: 'Keine weiteren Titel.',
   savePlaylist: 'Playlist speichern',
   updatePlaylist: 'Playlist aktualisieren',

src/locales/de/settings.ts

@@ -330,6 +330,7 @@ export const settings = {
   queueModeTitle: 'Warteschlangen-Ansicht',
   queueModeQueueSub: 'Zeigt nur kommende Titel. Der laufende Titel bleibt im Kopf und verschwindet aus der Liste, sobald er gespielt wurde.',
   queueModePlaylistSub: 'Behält die ganze Warteschlange in der Liste, der laufende Titel oben hervorgehoben; gespielte Titel bleiben stehen.',
+  queueModeTimelineSub: 'Aktuellen Titel zentrieren — gespielter Verlauf darüber, kommende Titel (in Shuffle-Reihenfolge) darunter.',
   queueToolbarTitle: 'Warteschlangen-Toolbar',
   queueToolbarReset: 'Zurücksetzen',
   queueToolbarSeparator: 'Trennlinie',

src/locales/en/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'Queue',
   modePlaylist: 'Playlist',
+  modeTimeline: 'Timeline',
+  upNext: 'Up next',
+  history: 'History',
   noUpcoming: 'No upcoming tracks.',
   savePlaylist: 'Save Playlist',
   updatePlaylist: 'Update Playlist',

src/locales/en/settings.ts

@@ -394,6 +394,7 @@ export const settings = {
   queueModeTitle: 'Queue Display Mode',
   queueModeQueueSub: 'Show only upcoming tracks. The current track stays in the header and leaves the list once it has played.',
   queueModePlaylistSub: 'Keep the whole queue in the list with the current track highlighted at the top; played tracks stay.',
+  queueModeTimelineSub: 'Center the current track, with played history above and upcoming tracks (in shuffle order) below.',
   queueToolbarTitle: 'Queue Toolbar',
   queueToolbarReset: 'Reset to default',
   queueToolbarSeparator: 'Separator',

src/locales/es/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'Cola',
   modePlaylist: 'Lista',
+  modeTimeline: 'Cronología',
+  upNext: 'A continuación',
+  history: 'Historial',
   noUpcoming: 'No hay próximas pistas.',
   savePlaylist: 'Guardar Lista',
   updatePlaylist: 'Actualizar Lista',

src/locales/es/settings.ts

@@ -329,6 +329,7 @@ export const settings = {
   queueModeTitle: 'Modo de visualización de la cola',
   queueModeQueueSub: 'Muestra solo las próximas pistas. La pista actual permanece en el encabezado y sale de la lista al reproducirse.',
   queueModePlaylistSub: 'Mantiene toda la cola en la lista, con la pista actual resaltada arriba; las reproducidas permanecen.',
+  queueModeTimelineSub: 'Centrar la pista actual, con el historial reproducido arriba y las próximas pistas (en orden aleatorio) debajo.',
   queueToolbarTitle: 'Barra de herramientas de cola',
   queueToolbarReset: 'Restablecer a predeterminado',
   queueToolbarSeparator: 'Separador',

src/locales/fr/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'File d\'attente',
   modePlaylist: 'Liste de lecture',
+  modeTimeline: 'Chronologie',
+  upNext: 'À suivre',
+  history: 'Historique',
   noUpcoming: 'Aucune piste à venir.',
   savePlaylist: 'Enregistrer la liste',
   updatePlaylist: 'Mettre à jour la liste',

src/locales/fr/settings.ts

@@ -327,6 +327,7 @@ export const settings = {
   queueModeTitle: 'Mode d\'affichage de la file',
   queueModeQueueSub: 'N\'affiche que les pistes à venir. La piste en cours reste dans l\'en-tête et quitte la liste une fois jouée.',
   queueModePlaylistSub: 'Conserve toute la file dans la liste, la piste en cours surlignée en haut ; les pistes jouées restent.',
+  queueModeTimelineSub: 'Centrer le morceau en cours, avec l\'historique au-dessus et les morceaux à venir (dans l\'ordre aléatoire) en dessous.',
   queueToolbarTitle: 'Barre d\'outils de file d\'attente',
   queueToolbarReset: 'Réinitialiser',
   queueToolbarSeparator: 'Séparateur',

src/locales/nb/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'Kø',
   modePlaylist: 'Spilleliste',
+  modeTimeline: 'Tidslinje',
+  upNext: 'Neste',
+  history: 'Historikk',
   noUpcoming: 'Ingen kommende spor.',
   savePlaylist: 'Lagre spilleliste',
   updatePlaylist: 'Oppdater spilleliste',

src/locales/nb/settings.ts

@@ -326,6 +326,7 @@ export const settings = {
   queueModeTitle: 'Visningsmodus for kø',
   queueModeQueueSub: 'Viser bare kommende spor. Det gjeldende sporet blir i toppen og forsvinner fra listen når det er spilt.',
   queueModePlaylistSub: 'Beholder hele køen i listen med gjeldende spor uthevet øverst; avspilte spor blir værende.',
+  queueModeTimelineSub: 'Sentrer gjeldende spor, med avspilt historikk over og kommende spor (i shuffle-rekkefølge) under.',
   queueToolbarTitle: 'Kø-verktøylinje',
   queueToolbarReset: 'Tilbakestill til standard',
   queueToolbarSeparator: 'Skilje',

src/locales/nl/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'Wachtrij',
   modePlaylist: 'Afspeellijst',
+  modeTimeline: 'Tijdlijn',
+  upNext: 'Hierna',
+  history: 'Geschiedenis',
   noUpcoming: 'Geen volgende nummers.',
   savePlaylist: 'Afspeellijst opslaan',
   updatePlaylist: 'Afspeellijst bijwerken',

src/locales/nl/settings.ts

@@ -327,6 +327,7 @@ export const settings = {
   queueModeTitle: 'Weergavemodus wachtrij',
   queueModeQueueSub: 'Toont alleen komende nummers. Het huidige nummer blijft in de kop en verdwijnt uit de lijst zodra het is afgespeeld.',
   queueModePlaylistSub: 'Houdt de hele wachtrij in de lijst met het huidige nummer bovenaan gemarkeerd; afgespeelde nummers blijven staan.',
+  queueModeTimelineSub: 'Centreer de huidige track, met de afgespeelde geschiedenis erboven en de komende tracks (in shuffle-volgorde) eronder.',
   queueToolbarTitle: 'Wachtrij-werkbalk',
   queueToolbarReset: 'Standaard herstellen',
   queueToolbarSeparator: 'Scheiding',

src/locales/ro/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'Coadă',
   modePlaylist: 'Playlist',
+  modeTimeline: 'Cronologie',
+  upNext: 'Urmează',
+  history: 'Istoric',
   noUpcoming: 'Nicio piesă în continuare.',
   savePlaylist: 'Salvează Playlist',
   updatePlaylist: 'Actualizează Playlist',

src/locales/ro/settings.ts

@@ -332,6 +332,7 @@ export const settings = {
   queueModeTitle: 'Mod de afișare a cozii',
   queueModeQueueSub: 'Arată doar piesele următoare. Piesa curentă rămâne în antet și iese din listă după ce a fost redată.',
   queueModePlaylistSub: 'Păstrează toată coada în listă, cu piesa curentă evidențiată sus; piesele redate rămân.',
+  queueModeTimelineSub: 'Centrează piesa curentă, cu istoricul redat deasupra și piesele următoare (în ordine aleatorie) dedesubt.',
   queueToolbarTitle: 'Toolbar Coadă',
   queueToolbarReset: 'Resetează la implicit',
   queueToolbarSeparator: 'Separator',

src/locales/ru/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: 'Очередь',
   modePlaylist: 'Плейлист',
+  modeTimeline: 'Хронология',
+  upNext: 'Далее',
+  history: 'История',
   noUpcoming: 'Нет следующих треков.',
   savePlaylist: 'Сохранить как плейлист',
   updatePlaylist: 'Обновить плейлист',

src/locales/ru/settings.ts

@@ -408,6 +408,7 @@ export const settings = {
   queueModeTitle: 'Режим отображения очереди',
   queueModeQueueSub: 'Показывает только предстоящие треки. Текущий трек остаётся в заголовке и исчезает из списка после воспроизведения.',
   queueModePlaylistSub: 'Сохраняет всю очередь в списке, текущий трек выделен вверху; воспроизведённые треки остаются.',
+  queueModeTimelineSub: 'Центрировать текущий трек: история воспроизведения сверху, предстоящие треки (в порядке перемешивания) снизу.',
   queueToolbarTitle: 'Панель инструментов очереди',
   queueToolbarReset: 'Сбросить',
   queueToolbarSeparator: 'Разделитель',

src/locales/zh/queue.ts

@@ -1,6 +1,9 @@
 export const queue = {
   title: '队列',
   modePlaylist: '播放列表',
+  modeTimeline: '时间轴',
+  upNext: '即将播放',
+  history: '历史',
   noUpcoming: '没有后续曲目。',
   savePlaylist: '保存为播放列表',
   updatePlaylist: '更新播放列表',

src/locales/zh/settings.ts

@@ -326,6 +326,7 @@ export const settings = {
   queueModeTitle: '队列显示模式',
   queueModeQueueSub: '仅显示即将播放的曲目。当前曲目保留在标题栏中，播放完毕后从列表移除。',
   queueModePlaylistSub: '在列表中保留整个队列，当前曲目在顶部高亮显示；已播放的曲目保留。',
+  queueModeTimelineSub: '将当前曲目居中显示，已播放的历史在上方，即将播放的曲目（按随机顺序）在下方。',
   queueToolbarTitle: '队列工具栏',
   queueToolbarReset: '重置为默认',
   queueToolbarSeparator: '分隔符',

src/store/authStoreRehydrate.ts

@@ -106,7 +106,7 @@ export function computeAuthStoreRehydration(state: AuthState): Partial<AuthState
 
   // Missing key (pre-feature persist) / garbage maps to 'queue' — the default
   // mode, which lists only upcoming tracks.
-  const VALID_QUEUE_DISPLAY_MODES = new Set<string>(['playlist', 'queue']);
+  const VALID_QUEUE_DISPLAY_MODES = new Set<string>(['playlist', 'queue', 'timeline']);
   const queueDisplayModeMigrated = VALID_QUEUE_DISPLAY_MODES.has(
     (state as { queueDisplayMode?: unknown }).queueDisplayMode as string,
   )

src/store/authStoreTypes.ts

@@ -42,7 +42,7 @@ export type DurationMode = 'total' | 'remaining' | 'eta';
  * - `queue`: the list shows upcoming tracks only — the current track lives in
  *   the header and drops out of the list once it has played.
  */
-export type QueueDisplayMode = 'playlist' | 'queue';
+export type QueueDisplayMode = 'playlist' | 'queue' | 'timeline';
 export type LoggingMode = 'off' | 'normal' | 'debug';
 /**
  * Wall-clock format for ETA / sleep-timer labels. `'auto'` follows the user's
@@ -185,7 +185,9 @@ export interface AuthState {
   queueNowPlayingCollapsed: boolean;
   /** Queue header duration chip mode (cycle: total → remaining → ETA). */
   queueDurationDisplayMode: DurationMode;
-  /** Queue panel render mode: full timeline (`playlist`) vs. upcoming-only (`queue`). */
+  /** Queue panel render mode: full list from top (`playlist`), upcoming-only
+   *  (`queue`), or full list centered on the current track with history above
+   *  and up-next below (`timeline`). */
   queueDisplayMode: QueueDisplayMode;
 
   /** Alpha: native hi-res sample rate output (disabled = safe 44.1 kHz mode) */