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/pages/Albums.tsx

@@ -4,6 +4,7 @@ import GenreFilterBar from '../components/GenreFilterBar';
 import YearFilterButton from '../components/YearFilterButton';
 import SortDropdown from '../components/SortDropdown';
 import { getAlbumList, getAlbumsByGenre, getAlbum, SubsonicAlbum, buildDownloadUrl } from '../api/subsonic';
+import { songToTrack } from '../store/playerStore';
 import { useTranslation } from 'react-i18next';
 import { useAuthStore } from '../store/authStore';
 import { useOfflineStore } from '../store/offlineStore';
@@ -13,7 +14,7 @@ import { invoke } from '@tauri-apps/api/core';
 import { join } from '@tauri-apps/api/path';
 import { showToast } from '../utils/toast';
 import { useZipDownloadStore } from '../store/zipDownloadStore';
-import { CheckSquare2, Download, HardDriveDownload, ListMusic, Disc3 } from 'lucide-react';
+import { CheckSquare2, Download, HardDriveDownload, ListMusic, Disc3, ListPlus } from 'lucide-react';
 
 type SortType = 'alphabeticalByName' | 'alphabeticalByArtist';
 type CompFilter = 'all' | 'only' | 'hide';
@@ -79,6 +80,22 @@ export default function Albums() {
 
   const selectedAlbums = visibleAlbums.filter(a => selectedIds.has(a.id));
   const openContextMenu = usePlayerStore(state => state.openContextMenu);
+  const enqueue = usePlayerStore(state => state.enqueue);
+
+  const handleEnqueueSelected = async () => {
+    if (selectedAlbums.length === 0) return;
+    try {
+      // Parallel — Navidrome handles concurrent getAlbum requests fine.
+      const results = await Promise.all(selectedAlbums.map(a => getAlbum(a.id).catch(() => null)));
+      const tracks = results.flatMap(r => r ? r.songs.map(songToTrack) : []);
+      if (tracks.length > 0) {
+        enqueue(tracks);
+        showToast(t('albums.enqueueQueued', { count: selectedAlbums.length }), 2500, 'info');
+      }
+    } finally {
+      clearSelection();
+    }
+  };
 
   const cycleCompFilter = () => {
     setCompFilter(v => v === 'all' ? 'only' : v === 'only' ? 'hide' : 'all');
@@ -210,6 +227,10 @@ export default function Albums() {
         <div style={{ display: 'flex', alignItems: 'center', gap: '0.5rem', flexWrap: 'wrap' }}>
           {selectionMode && selectedIds.size > 0 ? (
             <>
+              <button className="btn btn-surface albums-selection-action-btn" onClick={handleEnqueueSelected}>
+                <ListPlus size={15} />
+                {t('albums.enqueueSelected', { count: selectedIds.size })}
+              </button>
               <button className="btn btn-surface albums-selection-action-btn" onClick={handleAddOffline}>
                 <HardDriveDownload size={15} />
                 {t('albums.addOffline')}