refactor(orbit,playback): move feature-owned stores (helpModal→orbit; libraryPlaybackHint+playerBarLayout→playback)

src/features/playback/store/audioEventHandlers.ts

@@ -9,7 +9,7 @@ import { resolveQueueTrack } from '@/features/playback/store/queueTrackView';
 import { invoke } from '@tauri-apps/api/core';
 import { getMusicNetworkRuntimeOrNull } from '@/music-network';
 import { setDeferHotCachePrefetch } from '@/utils/cache/hotCacheGate';
-import { notifyLibraryPlaybackHint } from '@/store/libraryPlaybackHint';
+import { notifyLibraryPlaybackHint } from '@/features/playback/store/libraryPlaybackHint';
 import {
   playListenSessionFinalize,
   playListenSessionOnProgress,

src/features/playback/store/libraryPlaybackHint.ts

@@ -0,0 +1,25 @@
+import { librarySetPlaybackHint, type PlaybackHint } from '@/lib/api/library';
+import { useAuthStore } from '@/store/authStore';
+import { useLibraryIndexStore } from '@/store/libraryIndexStore';
+
+/**
+ * Bridge from the audio lifecycle to the Rust library scheduler's
+ * bandwidth lane (spec §6.2.4, PR-5 kickoff Q3 — JS pushes the hint).
+ * Only fires when the local index is enabled for the active server,
+ * and dedupes repeated identical hints so we don't spam the IPC
+ * boundary on every progress tick.
+ */
+let lastHint: PlaybackHint | null = null;
+
+export function notifyLibraryPlaybackHint(hint: PlaybackHint): void {
+  const activeId = useAuthStore.getState().activeServerId;
+  if (!useLibraryIndexStore.getState().isIndexEnabled(activeId)) {
+    lastHint = null;
+    return;
+  }
+  if (lastHint === hint) return;
+  lastHint = hint;
+  void librarySetPlaybackHint(hint).catch(() => {
+    /* best-effort — scheduler falls back to Idle parallelism */
+  });
+}

src/features/playback/store/playerBarLayoutStore.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it, beforeEach } from 'vitest';
+import {
+  DEFAULT_PLAYER_BAR_LAYOUT_ITEMS,
+  usePlayerBarLayoutStore,
+} from '@/features/playback/store/playerBarLayoutStore';
+
+describe('playerBarLayoutStore', () => {
+  beforeEach(() => {
+    usePlayerBarLayoutStore.getState().reset();
+  });
+
+  it('starts with all six items visible in declared order', () => {
+    const items = usePlayerBarLayoutStore.getState().items;
+    expect(items.map(i => i.id)).toEqual([
+      'starRating', 'favorite', 'lastfmLove', 'playbackRate', 'equalizer', 'miniPlayer',
+    ]);
+    expect(items.every(i => i.visible)).toBe(true);
+  });
+
+  it('toggleItem flips the matching id without disturbing the others', () => {
+    usePlayerBarLayoutStore.getState().toggleItem('equalizer');
+    const items = usePlayerBarLayoutStore.getState().items;
+    expect(items.find(i => i.id === 'equalizer')?.visible).toBe(false);
+    expect(items.find(i => i.id === 'starRating')?.visible).toBe(true);
+    expect(items.find(i => i.id === 'miniPlayer')?.visible).toBe(true);
+  });
+
+  it('reset restores defaults after toggles', () => {
+    const { toggleItem, reset } = usePlayerBarLayoutStore.getState();
+    toggleItem('favorite');
+    toggleItem('lastfmLove');
+    reset();
+    expect(usePlayerBarLayoutStore.getState().items).toEqual(DEFAULT_PLAYER_BAR_LAYOUT_ITEMS);
+  });
+});

src/features/playback/store/playerBarLayoutStore.ts

@@ -0,0 +1,63 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+export type PlayerBarLayoutItemId =
+  | 'starRating'
+  | 'favorite'
+  // 'lastfmLove' is the enrichment-primary love button. The id is kept (not
+  // renamed to 'networkLove') because it is persisted in user layouts — renaming
+  // would silently drop the button from existing configs. Label is provider-neutral.
+  | 'lastfmLove'
+  | 'playbackRate'
+  | 'equalizer'
+  | 'miniPlayer';
+
+export interface PlayerBarLayoutItemConfig {
+  id: PlayerBarLayoutItemId;
+  visible: boolean;
+}
+
+export const DEFAULT_PLAYER_BAR_LAYOUT_ITEMS: PlayerBarLayoutItemConfig[] = [
+  { id: 'starRating',  visible: true },
+  { id: 'favorite',    visible: true },
+  { id: 'lastfmLove',  visible: true },
+  { id: 'playbackRate', visible: true },
+  { id: 'equalizer',   visible: true },
+  { id: 'miniPlayer',  visible: true },
+];
+
+interface PlayerBarLayoutStore {
+  items: PlayerBarLayoutItemConfig[];
+  setItems: (items: PlayerBarLayoutItemConfig[]) => void;
+  toggleItem: (id: PlayerBarLayoutItemId) => void;
+  reset: () => void;
+}
+
+export const usePlayerBarLayoutStore = create<PlayerBarLayoutStore>()(
+  persist(
+    (set) => ({
+      items: DEFAULT_PLAYER_BAR_LAYOUT_ITEMS,
+
+      setItems: (items) => set({ items }),
+
+      toggleItem: (id) => set((s) => ({
+        items: s.items.map(it => it.id === id ? { ...it, visible: !it.visible } : it),
+      })),
+
+      reset: () => set({ items: DEFAULT_PLAYER_BAR_LAYOUT_ITEMS }),
+    }),
+    {
+      name: 'psysonic_player_bar_layout',
+      onRehydrateStorage: () => (state) => {
+        if (!state) return;
+        const knownIds = new Set(DEFAULT_PLAYER_BAR_LAYOUT_ITEMS.map(i => i.id));
+        const safe = (state.items ?? [])
+          .filter((i): i is PlayerBarLayoutItemConfig =>
+            i != null && typeof i.id === 'string' && knownIds.has(i.id as PlayerBarLayoutItemId));
+        const seen = new Set(safe.map(i => i.id));
+        const missing = DEFAULT_PLAYER_BAR_LAYOUT_ITEMS.filter(i => !seen.has(i.id));
+        state.items = missing.length > 0 ? [...safe, ...missing] : safe;
+      },
+    }
+  )
+);