refactor(player): 提取播放栏共享逻辑为 composable

- 新增 useVolumeControl：统一音量管理（volumeSlider、mute、滚轮调节）
- 新增 useFavorite：收藏状态与切换
- 新增 usePlaybackControl：播放/暂停、上/下一首
- PlayBar、MiniPlayBar、SimplePlayBar、MobilePlayBar 使用新 composable
- 修复音量存储不一致：MiniPlayBar/SimplePlayBar 原先绕过 playerStore 直接操作 localStorage

src/renderer/hooks/usePlaybackControl.ts

@@ -0,0 +1,41 @@
+import { computed } from 'vue';
+
+import { playMusic } from '@/hooks/MusicHook';
+import { usePlayerStore } from '@/store/modules/player';
+
+/**
+ * 播放控制 composable（播放/暂停、上一首、下一首）
+ */
+export function usePlaybackControl() {
+  const playerStore = usePlayerStore();
+
+  /** 是否正在播放 */
+  const isPlaying = computed(() => playerStore.isPlay);
+
+  /** 播放/暂停切换 */
+  const playMusicEvent = async () => {
+    try {
+      await playerStore.setPlay({ ...playMusic.value });
+    } catch (error) {
+      console.error('播放出错:', error);
+      playerStore.nextPlay();
+    }
+  };
+
+  /** 下一首 */
+  const handleNext = () => {
+    playerStore.nextPlay();
+  };
+
+  /** 上一首 */
+  const handlePrev = () => {
+    playerStore.prevPlay();
+  };
+
+  return {
+    isPlaying,
+    playMusicEvent,
+    handleNext,
+    handlePrev
+  };
+}