initial scaffold

src/stores/playerStore.ts

@@ -0,0 +1,41 @@
+import { create } from 'zustand';
+import type { PlaybackState, Track } from '@/types/audio';
+
+/**
+ * Player state — the UI's single source of truth, mirrored from the playback
+ * engine (RNTP at M0) by `usePlaybackSync`. Field names match desktop
+ * `playerStore` so queue/transport logic ports cleanly. Setters are called by
+ * the sync layer and the playback controller, not directly by screens.
+ */
+interface PlayerStore {
+  currentTrack: Track | null;
+  playbackState: PlaybackState;
+  currentTime: number;
+  duration: number;
+  volume: number; // 0–1
+  isMuted: boolean;
+
+  setCurrentTrack: (track: Track | null) => void;
+  setPlaybackState: (state: PlaybackState) => void;
+  setProgress: (currentTime: number, duration: number) => void;
+  setVolume: (volume: number) => void;
+  setMuted: (isMuted: boolean) => void;
+  reset: () => void;
+}
+
+export const usePlayerStore = create<PlayerStore>((set) => ({
+  currentTrack: null,
+  playbackState: 'stopped',
+  currentTime: 0,
+  duration: 0,
+  volume: 1,
+  isMuted: false,
+
+  setCurrentTrack: (currentTrack) => set({ currentTrack }),
+  setPlaybackState: (playbackState) => set({ playbackState }),
+  setProgress: (currentTime, duration) => set({ currentTime, duration }),
+  setVolume: (volume) => set({ volume }),
+  setMuted: (isMuted) => set({ isMuted }),
+  reset: () =>
+    set({ currentTrack: null, playbackState: 'stopped', currentTime: 0, duration: 0 }),
+}));