refactor(player): E.42 — migrate playerStore re-exports to direct imports (#607)

Migrates ~74 call sites away from the playerStore re-export shims that
were kept during M0–E.41 to avoid touching 30+ imports per PR. Now
that the bigger refactor work is done, each helper goes back to its
real home:

- `initAudioListeners`, `installQueueUndoHotkey`, `flushPlayQueuePosition`
  → from their own store modules
- `getPlaybackProgressSnapshot`, `subscribePlaybackProgress`,
  `PlaybackProgressSnapshot` → from `playbackProgress`
- `resolveReplayGainDb`, `shuffleArray`, `songToTrack`
  → from `utils/*`
- `_resetQueueUndoStacksForTest`, `consumePendingQueueListScrollTop`,
  `registerQueueListScrollTopReader` → from `queueUndo`
- `PlayerState`, `Track` types → from `playerStoreTypes`

Drops the corresponding 13 re-export stubs from `playerStore.ts` and
the now-unused imports. Also drops dead section banners + per-wrapper
comments above one-line action delegates. Trims one stale "(separate
PR)" note in `transportLightActions.ts` since that follow-up landed
in E.39.

`playerStore.ts`: 180 → 112 LOC (−68). Down from Phase E's starting
3732 LOC.

`bootstrap.test.ts` mock target updated from `../store/playerStore`
to `../store/queueUndoHotkey` to keep the spy reachable after the
import change.

src/hooks/useLyrics.ts

@@ -1,3 +1,4 @@
+import type { Track } from '../store/playerStoreTypes';
 import { useEffect, useState } from 'react';
 import { useShallow } from 'zustand/react/shallow';
 import { invoke } from '@tauri-apps/api/core';
@@ -9,8 +10,6 @@ import { useAuthStore } from '../store/authStore';
 import { useOfflineStore } from '../store/offlineStore';
 import { useHotCacheStore } from '../store/hotCacheStore';
 import { getCachedLyrics, putCachedLyrics, lyricsCacheKey } from '../utils/lyricsPersistentCache';
-import type { Track } from '../store/playerStore';
-
 export type LyricsSource = 'server' | 'lrclib' | 'netease' | 'embedded' | 'lyricsplus';
 
 /**