optimize further

src/stores/playerUiStore.ts

@@ -0,0 +1,25 @@
+import { create } from 'zustand';
+
+/**
+ * Now-playing overlay gate. The player is an always-mounted overlay above the
+ * navigator (not a route): `everOpened` latches the first mount so cold start
+ * pays nothing, `playerOpen` drives the UI-thread slide open/close. Session
+ * state only — never persisted.
+ */
+interface PlayerUiStore {
+  playerOpen: boolean;
+  /** Mount latch: once true the overlay stays mounted (hidden) for instant reopen. */
+  everOpened: boolean;
+  openPlayer: () => void;
+  closePlayer: () => void;
+  /** Mount the overlay hidden (e.g. shortly after playback starts) so even the first open is instant. */
+  prewarm: () => void;
+}
+
+export const usePlayerUiStore = create<PlayerUiStore>((set) => ({
+  playerOpen: false,
+  everOpened: false,
+  openPlayer: () => set({ playerOpen: true, everOpened: true }),
+  closePlayer: () => set({ playerOpen: false }),
+  prewarm: () => set({ everOpened: true }),
+}));