Sanitize for open-source release

- Replace internal tenant name your-tenant.feishu.cn with your-tenant.feishu.cn
- Replace real wiki token with placeholder WikiNodeTokenExample
- Parameterize tenant via FEISHU_TENANT env var in feishu-to-md.mjs
- Expand .gitignore to cover cookies, auth artifacts, IDE files

feishu-to-md.mjs

@@ -21,14 +21,25 @@ if (!argv[0] || argv[0] === '--help' || argv[0] === '-h') {
 
 示例：
   node feishu-to-md.mjs https://your-tenant.feishu.cn/wiki/WikiNodeTokenExample
-  node feishu-to-md.mjs WikiNodeTokenExample
+  FEISHU_TENANT=your-tenant node feishu-to-md.mjs WikiNodeTokenExample
 `);
   process.exit(0);
 }
 
 const input   = argv[0].trim();
 const outDir  = argv[1] ? resolve(argv[1]) : resolve('./output');
-const wikiUrl = input.startsWith('http') ? input : `https://your-tenant.feishu.cn/wiki/${input}`;
+let wikiUrl;
+if (input.startsWith('http')) {
+  wikiUrl = input;
+} else {
+  const tenant = process.env.FEISHU_TENANT;
+  if (!tenant) {
+    console.error('❌ 传入纯 token 时需设置 FEISHU_TENANT 环境变量，例如：');
+    console.error('   FEISHU_TENANT=your-tenant node feishu-to-md.mjs <token>');
+    process.exit(1);
+  }
+  wikiUrl = `https://${tenant}.feishu.cn/wiki/${input}`;
+}
 
 // lark-cli 命令必须在 outDir 下执行（+media-preview 只接受相对路径）
 process.chdir(outDir);