fix(mobile): prevent crash when restoring a saved playback queue

apps/mobile/test/eventId.test.ts

@@ -0,0 +1,19 @@
+import { afterEach, expect, it, vi } from 'vitest';
+import { EventBuffer } from '@pipu/core';
+import { eventId } from '../src/player/eventId';
+
+afterEach(() => vi.unstubAllGlobals());
+
+it('queues restored-track events on Hermes without Web Crypto', () => {
+  vi.stubGlobal('crypto', undefined);
+  const nativeUuid = vi.fn()
+    .mockReturnValueOnce('00000000-0000-4fff-bfff-ffffffffffff')
+    .mockReturnValueOnce('00000000-0000-4fff-bfff-fffffffffffe');
+  vi.stubGlobal('expo', { uuidv4: nativeUuid });
+  const buffer = new EventBuffer({ send: vi.fn() }, () => 0x0190_0000_0000, undefined, eventId);
+  buffer.push({ type: 'play_start', track_id: 'restored-track' });
+  buffer.push({ type: 'skip', track_id: 'restored-track' });
+  expect(buffer.pending[0]?.id).toBe('01900000-0000-7fff-bfff-ffffffffffff');
+  expect(buffer.pending[1]?.id).not.toBe(buffer.pending[0]?.id);
+  expect(nativeUuid).toHaveBeenCalledTimes(2);
+});