feat(albums): add 'Enqueue' option to album cover, context menu and multi-select toolbar (closes #253) (#256)

Per bcorporaal's request in #253: making a queue from multiple albums
required either replacing the queue (Play) or going into each album
detail page first. Three new entry points cover the common workflows:

1. Hover button on the album cover next to Play. Both buttons share
   the same accent style and size so the secondary action is just as
   readable as the primary — first attempt with a darker pill was hard
   to see and unbalanced the hover.

2. Context-menu entry "Enqueue Album" between "Open Album" and "Go to
   Artist". The i18n key already existed (was used by the album-song
   sub-context); just wiring up the action.

3. Multi-select toolbar in Albums.tsx: new "Enqueue (N)" button placed
   before "Add Offline" so power users selecting several albums no
   longer have to right-click. Plus a context-menu entry "Enqueue N
   Albums" for the same flow when a multi-album right-click happens
   anywhere else.

All multi-album fetches use Promise.all(getAlbum(...)) — Navidrome
handles parallel requests instantly (per memory note from PR #246).

i18n: 4 new keys per locale (3 with pluralisation: contextMenu.enqueueAlbums,
albums.enqueueSelected, albums.enqueueQueued).

Co-authored-by: Psychotoxical <dev@psysonic.app>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/locales/de.ts

@@ -99,6 +99,8 @@ export const deTranslation = {
     playNext: 'Als Nächstes abspielen',
     addToQueue: 'Zur Warteschlange hinzufügen',
     enqueueAlbum: 'Ganzes Album einreihen',
+    enqueueAlbums_one: '{{count}} Album einreihen',
+    enqueueAlbums_other: '{{count}} Alben einreihen',
     startRadio: 'Radio starten',
     instantMix: 'Instant Mix',
     instantMixFailed: 'Instant Mix konnte nicht erstellt werden — Server- oder Pluginfehler.',
@@ -303,6 +305,10 @@ export const deTranslation = {
     selectionCount: '{{count}} ausgewählt',
     downloadZips: 'ZIPs herunterladen',
     addOffline: 'Offline hinzufügen',
+    enqueueSelected_one: 'Einreihen ({{count}})',
+    enqueueSelected_other: 'Einreihen ({{count}})',
+    enqueueQueued_one: '{{count}} Album zur Warteschlange hinzugefügt',
+    enqueueQueued_other: '{{count}} Alben zur Warteschlange hinzugefügt',
     downloadingZip: 'Lade {{current}}/{{total}} herunter: {{name}}',
     downloadZipDone: '{{count}} ZIP(s) heruntergeladen',
     downloadZipFailed: 'Download fehlgeschlagen: {{name}}',

src/locales/en.ts

@@ -100,6 +100,8 @@ export const enTranslation = {
     playNext: 'Play Next',
     addToQueue: 'Add to Queue',
     enqueueAlbum: 'Enqueue Album',
+    enqueueAlbums_one: 'Enqueue {{count}} Album',
+    enqueueAlbums_other: 'Enqueue {{count}} Albums',
     startRadio: 'Start Radio',
     instantMix: 'Instant Mix',
     instantMixFailed: 'Could not build Instant Mix — server or plugin error.',
@@ -304,6 +306,10 @@ export const enTranslation = {
     selectionCount: '{{count}} selected',
     downloadZips: 'Download ZIPs',
     addOffline: 'Add Offline',
+    enqueueSelected_one: 'Enqueue ({{count}})',
+    enqueueSelected_other: 'Enqueue ({{count}})',
+    enqueueQueued_one: 'Added {{count}} album to queue',
+    enqueueQueued_other: 'Added {{count}} albums to queue',
     downloadingZip: 'Downloading {{current}}/{{total}}: {{name}}',
     downloadZipDone: '{{count}} ZIP(s) downloaded',
     downloadZipFailed: 'Failed to download {{name}}',

src/locales/es.ts

@@ -100,6 +100,8 @@ export const esTranslation = {
     playNext: 'Reproducir Siguiente',
     addToQueue: 'Agregar a la Cola',
     enqueueAlbum: 'Agregar Álbum a la Cola',
+    enqueueAlbums_one: 'Agregar {{count}} álbum a la cola',
+    enqueueAlbums_other: 'Agregar {{count}} álbumes a la cola',
     startRadio: 'Iniciar Radio',
     instantMix: 'Mezcla Instantánea',
     instantMixFailed: 'No se pudo crear la Mezcla Instantánea — error del servidor o plugin.',
@@ -304,6 +306,10 @@ export const esTranslation = {
     selectionCount: '{{count}} seleccionados',
     downloadZips: 'Descargar ZIPs',
     addOffline: 'Agregar Offline',
+    enqueueSelected_one: 'A la cola ({{count}})',
+    enqueueSelected_other: 'A la cola ({{count}})',
+    enqueueQueued_one: '{{count}} álbum añadido a la cola',
+    enqueueQueued_other: '{{count}} álbumes añadidos a la cola',
     downloadingZip: 'Descargando {{current}}/{{total}}: {{name}}',
     downloadZipDone: '{{count}} ZIP(s) descargado(s)',
     downloadZipFailed: 'Error al descargar {{name}}',

src/locales/fr.ts

@@ -99,6 +99,8 @@ export const frTranslation = {
     playNext: 'Lire ensuite',
     addToQueue: 'Ajouter à la file',
     enqueueAlbum: 'Mettre l\'album en file',
+    enqueueAlbums_one: 'Mettre {{count}} album en file',
+    enqueueAlbums_other: 'Mettre {{count}} albums en file',
     startRadio: 'Démarrer la radio',
     instantMix: 'Mix instantané',
     instantMixFailed: 'Impossible de créer le mix instantané — erreur serveur ou plugin.',
@@ -303,6 +305,10 @@ export const frTranslation = {
     selectionCount: '{{count}} sélectionnés',
     downloadZips: 'Télécharger les ZIPs',
     addOffline: 'Ajouter hors ligne',
+    enqueueSelected_one: 'Mettre en file ({{count}})',
+    enqueueSelected_other: 'Mettre en file ({{count}})',
+    enqueueQueued_one: '{{count}} album ajouté à la file',
+    enqueueQueued_other: '{{count}} albums ajoutés à la file',
     downloadingZip: 'Téléchargement {{current}}/{{total}} : {{name}}',
     downloadZipDone: '{{count}} ZIP(s) téléchargé(s)',
     downloadZipFailed: 'Échec du téléchargement de {{name}}',

src/locales/nb.ts

@@ -99,6 +99,8 @@ export const nbTranslation = {
     playNext: 'Spill neste',
     addToQueue: 'Legg til i kø',
     enqueueAlbum: 'Legg albumet i kø',
+    enqueueAlbums_one: 'Legg {{count}} album i kø',
+    enqueueAlbums_other: 'Legg {{count}} album i kø',
     startRadio: 'Start radio',
     instantMix: 'Instant Mix',
     instantMixFailed: 'Kunne ikke lage Instant Mix — server- eller pluginfeil.',
@@ -303,6 +305,10 @@ export const nbTranslation = {
     selectionCount: '{{count}} valgt',
     downloadZips: 'Last ned ZIPs',
     addOffline: 'Legg til offline',
+    enqueueSelected_one: 'Legg i kø ({{count}})',
+    enqueueSelected_other: 'Legg i kø ({{count}})',
+    enqueueQueued_one: '{{count}} album lagt til i køen',
+    enqueueQueued_other: '{{count}} album lagt til i køen',
     downloadingZip: 'Laster ned {{current}}/{{total}}: {{name}}',
     downloadZipDone: '{{count}} ZIP(s) lastet ned',
     downloadZipFailed: 'Kunne ikke laste ned {{name}}',

src/locales/nl.ts

@@ -99,6 +99,8 @@ export const nlTranslation = {
     playNext: 'Volgende afspelen',
     addToQueue: 'Aan wachtrij toevoegen',
     enqueueAlbum: 'Album in wachtrij',
+    enqueueAlbums_one: '{{count}} album in wachtrij',
+    enqueueAlbums_other: '{{count}} albums in wachtrij',
     startRadio: 'Radio starten',
     instantMix: 'Instant Mix',
     instantMixFailed: 'Instant Mix mislukt — server- of pluginfout.',
@@ -302,6 +304,10 @@ export const nlTranslation = {
     selectionCount: '{{count}} geselecteerd',
     downloadZips: 'ZIPs downloaden',
     addOffline: 'Offline toevoegen',
+    enqueueSelected_one: 'In wachtrij ({{count}})',
+    enqueueSelected_other: 'In wachtrij ({{count}})',
+    enqueueQueued_one: '{{count}} album toegevoegd aan wachtrij',
+    enqueueQueued_other: '{{count}} albums toegevoegd aan wachtrij',
     downloadingZip: 'Downloaden {{current}}/{{total}}: {{name}}',
     downloadZipDone: '{{count}} ZIP(s) gedownload',
     downloadZipFailed: 'Downloaden van {{name}} mislukt',

src/locales/ru.ts

@@ -100,6 +100,10 @@ export const ruTranslation = {
     playNext: 'Играть следующим',
     addToQueue: 'В конец очереди',
     enqueueAlbum: 'Альбом в очередь',
+    enqueueAlbums_one: '{{count}} альбом в очередь',
+    enqueueAlbums_few: '{{count}} альбома в очередь',
+    enqueueAlbums_many: '{{count}} альбомов в очередь',
+    enqueueAlbums_other: '{{count}} альбомов в очередь',
     startRadio: 'Радио по похожим',
     instantMix: 'Instant Mix',
     instantMixFailed: 'Не удалось собрать Instant Mix — ошибка сервера или плагина.',
@@ -314,6 +318,14 @@ export const ruTranslation = {
     selectionCount: '{{count}} выбрано',
     downloadZips: 'Скачать ZIP-архивы',
     addOffline: 'Добавить офлайн',
+    enqueueSelected_one: 'В очередь ({{count}})',
+    enqueueSelected_few: 'В очередь ({{count}})',
+    enqueueSelected_many: 'В очередь ({{count}})',
+    enqueueSelected_other: 'В очередь ({{count}})',
+    enqueueQueued_one: '{{count}} альбом добавлен в очередь',
+    enqueueQueued_few: '{{count}} альбома добавлены в очередь',
+    enqueueQueued_many: '{{count}} альбомов добавлены в очередь',
+    enqueueQueued_other: '{{count}} альбомов добавлены в очередь',
     downloadingZip: 'Загрузка {{current}}/{{total}}: {{name}}',
     downloadZipDone: '{{count}} ZIP-архив(ов) загружено',
     downloadZipFailed: 'Не удалось скачать {{name}}',

src/locales/zh.ts

@@ -99,6 +99,8 @@ export const zhTranslation = {
     playNext: '下一首播放',
     addToQueue: '添加到队列',
     enqueueAlbum: '专辑加入队列',
+    enqueueAlbums_one: '{{count}} 张专辑加入队列',
+    enqueueAlbums_other: '{{count}} 张专辑加入队列',
     startRadio: '开始电台',
     instantMix: '即时混音',
     instantMixFailed: '无法生成即时混音 — 服务器或插件出错。',
@@ -302,6 +304,10 @@ export const zhTranslation = {
     selectionCount: '{{count}} 已选择',
     downloadZips: '下载 ZIP',
     addOffline: '添加离线',
+    enqueueSelected_one: '加入队列 ({{count}})',
+    enqueueSelected_other: '加入队列 ({{count}})',
+    enqueueQueued_one: '已将 {{count}} 张专辑加入队列',
+    enqueueQueued_other: '已将 {{count}} 张专辑加入队列',
     downloadingZip: '正在下载 {{current}}/{{total}}: {{name}}',
     downloadZipDone: '已下载 {{count}} 个 ZIP',
     downloadZipFailed: '下载 {{name}} 失败',