fix(mpris): 修复 MPRIS 模块多项安全和性能问题

- 将 fix-sandbox.js 从 postinstall 移除，避免 npm install 时执行 sudo
- 修复 play/pause/stop 事件语义错误，不再全部映射到 togglePlay
- 缓存平台信息避免 sendSync 阻塞渲染进程
- 修复 cleanupAppShortcuts 中缺少 MPRIS 监听器清理导致的事件泄漏
- destroyMpris 中添加 IPC 监听器清理
- 清理冗余调试日志，安全加载 dbus-native 模块
- 添加 mpris-service 类型声明解决跨平台类型检查问题

fix-sandbox.js

@@ -1,9 +1,21 @@
+/**
+ * 修复 Linux 下 Electron sandbox 权限问题
+ * chrome-sandbox 需要 root 拥有且权限为 4755
+ *
+ * 注意：此脚本需要 sudo 权限，仅在 CI 环境或手动执行时使用
+ * 用法：sudo node fix-sandbox.js
+ */
 const { execSync } = require('child_process');
+const fs = require('fs');
+const path = require('path');
 
 if (process.platform === 'linux') {
-  // You need to make sure that
-  // /home/runner/work/VutronMusic/VutronMusic/node_modules/electron/dist/chrome-sandbox
-  // is owned by root and has mode 4755.
-  execSync('sudo chown root:root ./node_modules/electron/dist/chrome-sandbox');
-  execSync('sudo chmod 4755 ./node_modules/electron/dist/chrome-sandbox');
+  const sandboxPath = path.resolve('./node_modules/electron/dist/chrome-sandbox');
+  if (fs.existsSync(sandboxPath)) {
+    execSync(`sudo chown root:root ${sandboxPath}`);
+    execSync(`sudo chmod 4755 ${sandboxPath}`);
+    console.log('[fix-sandbox] chrome-sandbox permissions fixed');
+  } else {
+    console.log('[fix-sandbox] chrome-sandbox not found, skipping');
+  }
 }