refactor(player): 重构播放控制系统，移除 Howler.js 改用原生 HTMLAudioElement

- 新建 playbackController.ts，使用 generation-based 取消替代 playbackRequestManager 状态机
- audioService 重写：单一持久 HTMLAudioElement + Web Audio API，createMediaElementSource 只调一次
- playerCore 瘦身为纯状态管理，移除 handlePlayMusic/playAudio/checkPlaybackState
- playlist next/prev 简化，区分用户手动切歌和歌曲自然播完
- MusicHook 适配 HTMLAudioElement API（.currentTime/.duration/.paused）
- preloadService 从 Howl 实例缓存改为 URL 可用性验证
- 所有 view/component 调用者迁移到 playbackController.playTrack()

修复：快速切歌竞态、seek 到未缓冲位置失败、重启后自动播放循环提示、EQ 重建崩溃

src/renderer/components/player/ReparsePopover.vue

@@ -100,9 +100,9 @@ import { useI18n } from 'vue-i18n';
 import { CacheManager } from '@/api/musicParser';
 import { playMusic } from '@/hooks/MusicHook';
 import { initLxMusicRunner, setLxMusicRunner } from '@/services/LxMusicSourceRunner';
+import { reparseCurrentSong } from '@/services/playbackController';
 import { SongSourceConfigManager } from '@/services/SongSourceConfigManager';
 import { useSettingsStore } from '@/store';
-import { usePlayerStore } from '@/store/modules/player';
 import type { LxMusicScriptConfig } from '@/types/lxMusic';
 import type { Platform } from '@/types/music';
 import { type MusicSourceGroup, useMusicSources } from '@/utils/musicSourceConfig';
@@ -119,7 +119,6 @@ type ReparseSourceItem = {
   lxScriptId?: string;
 };
 
-const playerStore = usePlayerStore();
 const settingsStore = useSettingsStore();
 const { t } = useI18n();
 const message = useMessage();
@@ -253,7 +252,7 @@ const reparseWithLxScript = async (source: ReparseSourceItem) => {
     selectedSourceId.value = source.id;
     SongSourceConfigManager.setConfig(songId, ['lxMusic'], 'manual');
 
-    const success = await playerStore.reparseCurrentSong('lxMusic', false);
+    const success = await reparseCurrentSong('lxMusic', false);
 
     if (success) {
       message.success(t('player.reparse.success'));
@@ -283,7 +282,7 @@ const directReparseMusic = async (source: ReparseSourceItem) => {
     selectedSourceId.value = source.id;
     SongSourceConfigManager.setConfig(songId, [source.platform], 'manual');
 
-    const success = await playerStore.reparseCurrentSong(source.platform, false);
+    const success = await reparseCurrentSong(source.platform, false);
 
     if (success) {
       message.success(t('player.reparse.success'));