chore(scripts): 移动 fix-sandbox.js 到 scripts 目录

将根目录的运维脚本统一收纳到 scripts/，并把脚本内的相对路径
改为基于 __dirname，避免在仓库子目录执行时找不到 node_modules。

scripts/fix-sandbox.js

@@ -0,0 +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 npm run fix-sandbox
+ */
+const { execSync } = require('child_process');
+const fs = require('fs');
+const path = require('path');
+
+if (process.platform === 'linux') {
+  const sandboxPath = path.resolve(__dirname, '../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');
+  }
+}