feat: v1.24.0 — Playlist Management, native sample rate playback

- Full playlist feature: overview grid, detail page with hero collage,
  tracklist DnD, song search, suggestions, context menu submenu
- Audio: disable all app-level resampling — every track plays at its
  native sample rate (target_rate always 0 in audio_play + chain_next)
- Fix: playlist hero bg flicker (memoize buildCoverArtUrl calls)
- Fix: input focus double-border (search-input → .input class)
- Polish: redesigned playlist search panel

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/store/playlistStore.ts

@@ -0,0 +1,23 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+interface PlaylistStore {
+  recentIds: string[];
+  touchPlaylist: (id: string) => void;
+  removeId: (id: string) => void;
+}
+
+export const usePlaylistStore = create<PlaylistStore>()(
+  persist(
+    (set) => ({
+      recentIds: [],
+      touchPlaylist: (id) =>
+        set((s) => ({
+          recentIds: [id, ...s.recentIds.filter((x) => x !== id)].slice(0, 50),
+        })),
+      removeId: (id) =>
+        set((s) => ({ recentIds: s.recentIds.filter((x) => x !== id) })),
+    }),
+    { name: 'psysonic_playlists_recent' }
+  )
+);